Company details for:
Keller UK
0130...
Little Keep Gate,
Barrack Road,
Dorchester,
Dorset,
DT1 1AH,
United Kingdom
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Highly Precise Pressure Transmitters Series 33 X / 35 X
Mathematically Compensated / Programmable
Digital Output of Transmitter:
This high precision of 0,01 %FS is available as an option (the standard Series 33 X has an accuracy of 0,05 %FS). These Series are based on the stable, floating piezoresisitive transducer and the newly developed XEMICS micro-processor with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the sensor are mathematically compensated.
Transmitter with Analog Output:
Integrated in the XEMICS processor is a D/A converter of 16 bit for analog signal outputs of 4…20 mA or 0…10 V. The output rate is 400 Hz. The accuracy is diminished by this converting process by 0,05 %FS. The digital output is available on all transmitters with analog output.
Digital Output of Transmitter:
This high precision of 0,01 %FS is available as an option (the standard Series 33 X has an accuracy of 0,05 %FS). These Series are based on the stable, floating piezoresisitive transducer and the newly developed XEMICS micro-processor with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the sensor are mathematically compensated.
Transmitter with Analog Output:
Integrated in the XEMICS processor is a D/A converter of 16 bit for analog signal outputs of 4…20 mA or 0…10 V. The output rate is 400 Hz. The accuracy is diminished by this converting process by 0,05 %FS. The digital output is available on all transmitters with analog output.
OEM Pressure Transducer Series 10 L
The pressure transducers of the 10L series have a robust housing made of stainless steel, giving them optimum long-term stability for a range of OEM applications. The metal diaphragm is welded on front-flush and gap-free, separating off the piezoresistive pressure sensor, which is made of silicon, from the measuring medium. Every pressure transducer is measured over the entire pressure and temperature profile and is supplied with a detailed calibration sheet.
Piezoresistive OEM Pressure Transducers Series 6LHP
The high-pressure transducers of the 6LHP series have a robust housing made of stainless steel, giving them optimum long-term stability for a range of OEM applications. The metal diaphragm is welded on front-flush and gap-free, separating off the piezoresistive pressure sensor, which is made of silicon, from the measuring medium. Every pressure transducer is measured over the entire pressure and temperature profile and is supplied with a detailed calibration sheet.
Piezoresistive OEM Pressure Transmitters Series 4 LD…9 LD
With I2C interface and Embedded Signal Conditioning
With the D-line, Keller introduces a unique combination consisting of an exceedingly robust industrial pressure transducer and the popular I2C microcontroller interface. Pressure transmitters with this interface are commonly available only in consumer market housings made of plastic or ceramic, where merely the parameters for compensation are stored in an integrated memory. The D-line OEM transmitters however have an unprecedented embedded digital signal processing (DSP) core for the compensation and normalization of the output values.
Performance features:
• Ultra low power consumption, optimised for battery powered applications
• Hermetically protected sensor electronics − extremely resistant to environmental influences
• Ultra-compact, robust housing made from stainless steel (optional Hastelloy C-276)
• No external electronics for compensation or signal processing
• Extremely accurate, outstanding long-term stability, no hysteresis
• Pressure ranges of 1 bar to 200 bar
• Easy to integrate into microcontroller based systems
• Internal two-chip solution with pressure sensor and signal processing separation provides a high degree of flexibility
With the D-line, Keller introduces a unique combination consisting of an exceedingly robust industrial pressure transducer and the popular I2C microcontroller interface. Pressure transmitters with this interface are commonly available only in consumer market housings made of plastic or ceramic, where merely the parameters for compensation are stored in an integrated memory. The D-line OEM transmitters however have an unprecedented embedded digital signal processing (DSP) core for the compensation and normalization of the output values.
Performance features:
• Ultra low power consumption, optimised for battery powered applications
• Hermetically protected sensor electronics − extremely resistant to environmental influences
• Ultra-compact, robust housing made from stainless steel (optional Hastelloy C-276)
• No external electronics for compensation or signal processing
• Extremely accurate, outstanding long-term stability, no hysteresis
• Pressure ranges of 1 bar to 200 bar
• Easy to integrate into microcontroller based systems
• Internal two-chip solution with pressure sensor and signal processing separation provides a high degree of flexibility
Piezoresistive Pressure Transmitters Series 21 Y
For Industrial Applications
The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide.
The vertical range of manufacture, the modular design and the programmable electronics make it possible to manufacture large, customer-specific batches.
The 21Y product line is outstanding due to its extreme robustness against electromagnetic fields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated fields. These transmitters are also extremely immune to external voltages between the housing and the electrical connection, which is particularly important when frequency converters are being used. The high insulation voltage of 300V make this product ideal for use in the harshest of environments.
The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide.
The vertical range of manufacture, the modular design and the programmable electronics make it possible to manufacture large, customer-specific batches.
The 21Y product line is outstanding due to its extreme robustness against electromagnetic fields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated fields. These transmitters are also extremely immune to external voltages between the housing and the electrical connection, which is particularly important when frequency converters are being used. The high insulation voltage of 300V make this product ideal for use in the harshest of environments.
Capacitive Transmitter Series 41 X / 41 X Ei
From 1 mbar Full Range / Resolution 1 µbar
The Series 41 X combines the ceramic measurement cell for low pressure ranges with the µP-electronics of the digital Series 30 transmitter. The pressure values from the signals of the pressure and temperature sensors are determined by polynomial compensation. The values can be displayed and stored on a PC via an RS485 interface and programming can also be carried out.
This pressure transmitter is also available as intrinsically safe version (Series 41 X Ei). It is used in explosion exposed areas, where the categories 1 and 2 are required.
The Series 41 X combines the ceramic measurement cell for low pressure ranges with the µP-electronics of the digital Series 30 transmitter. The pressure values from the signals of the pressure and temperature sensors are determined by polynomial compensation. The values can be displayed and stored on a PC via an RS485 interface and programming can also be carried out.
This pressure transmitter is also available as intrinsically safe version (Series 41 X Ei). It is used in explosion exposed areas, where the categories 1 and 2 are required.
Ultra-Fast Miniature Pressure Transducer Series M5
Bandwidth 50 kHz / Resistant up to 200 °C / Accuracy 0,1 %FS
The Series M5 pressure transmitters, with their 0…50 kHz dynamic range and M5 pressure connection, are optimised both for dynamic (i.e. fast pressure pulsations at close proximity) as well as static pressure measurements. The sensor design enables excellent media compatibility and supports measurements at temperatures of up to 200 °C without cooling adapters.
Electronics
The circuitry for the Series M5 HB was specifically developed to take advantage of the high dynamic range of the M5 sensor head. The signal path remains entirely analogue, although it is readjusted in real time by means of a high-precision digital compensation circuit. This ensures the full dynamic range of the sensor and the accuracy of the measurement signal are maintained across the entire 0…50 kHz bandwidth. With a temperature range of -40…+125 °C, the remote signal converter satisfies the exceptional demands associated with hostile environments; e.g., engine test benches. The sensor head alone (see the data sheet for the Series M5), i.e., without the remote signal converter, is available for those applications better served by a sensor with 80 mV output (@ 1mA supply). Included with this configuration is a calibration card providing the user with actual test data taken from the sensor during factory calibration.
The Series M5 pressure transmitters, with their 0…50 kHz dynamic range and M5 pressure connection, are optimised both for dynamic (i.e. fast pressure pulsations at close proximity) as well as static pressure measurements. The sensor design enables excellent media compatibility and supports measurements at temperatures of up to 200 °C without cooling adapters.
Electronics
The circuitry for the Series M5 HB was specifically developed to take advantage of the high dynamic range of the M5 sensor head. The signal path remains entirely analogue, although it is readjusted in real time by means of a high-precision digital compensation circuit. This ensures the full dynamic range of the sensor and the accuracy of the measurement signal are maintained across the entire 0…50 kHz bandwidth. With a temperature range of -40…+125 °C, the remote signal converter satisfies the exceptional demands associated with hostile environments; e.g., engine test benches. The sensor head alone (see the data sheet for the Series M5), i.e., without the remote signal converter, is available for those applications better served by a sensor with 80 mV output (@ 1mA supply). Included with this configuration is a calibration card providing the user with actual test data taken from the sensor during factory calibration.
Ultra-Fast and Precise Pressure Transmitters Series M5 HB
Bandwidth 50 kHz / Resistant up to 200 °C / Accuracy 0,1 %FS
The Series M5 pressure transmitters, with their 0…50 kHz dynamic range and M5 pressure connection, are optimized both for dynamic (i.e. fast pressure pulsations at close proximity) as well as static pressure measurements. The sensor design enables excellent media compatibility and supports measurements at temperatures of up to 200 °C without cooling adapters.
Electronics
The circuitry for the Series M5 HB was specifically developed to take advantage of the high dynamic range of the M5 sensor head. The signal path remains entirely analog, although it is readjusted in real time by means of a high-precision digital compensation circuit. This ensures the full dynamic range of the sensor and the accuracy of the measurement signal are maintained across the entire 0…50 kHz bandwidth. With a temperature range of -40…+125 °C, the remote signal converter satisfies the exceptional demands associated with hostile environments; e.g., engine test benches. The sensor head alone (see the data sheet for the Series M5), i.e., without the remote signal converter, is available for those applications better served by a sensor with 80 mV output (@ 1 mA supply). Included with this configuration is a calibration card providing the user with actual test data taken from the sensor during factory calibration.
The Series M5 pressure transmitters, with their 0…50 kHz dynamic range and M5 pressure connection, are optimized both for dynamic (i.e. fast pressure pulsations at close proximity) as well as static pressure measurements. The sensor design enables excellent media compatibility and supports measurements at temperatures of up to 200 °C without cooling adapters.
Electronics
The circuitry for the Series M5 HB was specifically developed to take advantage of the high dynamic range of the M5 sensor head. The signal path remains entirely analog, although it is readjusted in real time by means of a high-precision digital compensation circuit. This ensures the full dynamic range of the sensor and the accuracy of the measurement signal are maintained across the entire 0…50 kHz bandwidth. With a temperature range of -40…+125 °C, the remote signal converter satisfies the exceptional demands associated with hostile environments; e.g., engine test benches. The sensor head alone (see the data sheet for the Series M5), i.e., without the remote signal converter, is available for those applications better served by a sensor with 80 mV output (@ 1 mA supply). Included with this configuration is a calibration card providing the user with actual test data taken from the sensor during factory calibration.
Piezoresistive OEM Pressure Transmitters Series 4 LC…9 LC
40…150 °C, with Embedded Signal Conditioning
The Series 4 LC…9 LC family of miniature OEM pressure transmitters combines a piezo resistive pressure sensor with -40…150 °C-capable signal conditioning in one compact, easy-to-integrate package.
The "LC" line of miniature pressure transmitters leverages Keller's extensive background in high-stability piezoresistive pressure sensors and innovative digital signal processing. Now, both pressure sensor and signal processor are integrated into a miniature, hermetically-sealed housing no larger than was once required for the sensor only!
The name given to this new technology is Chip-In-Oil (CIO). CIO means not only that the entire pressure transmitter is embedded within a hermetically-sealed, oil-filled housing, but that this transmitter can then be seamlessly integrated into the OEM product, achieving cost savings and system performance not possible with other, conventional technologies.
The Series 4 LC…9 LC family of miniature OEM pressure transmitters combines a piezo resistive pressure sensor with -40…150 °C-capable signal conditioning in one compact, easy-to-integrate package.
The "LC" line of miniature pressure transmitters leverages Keller's extensive background in high-stability piezoresistive pressure sensors and innovative digital signal processing. Now, both pressure sensor and signal processor are integrated into a miniature, hermetically-sealed housing no larger than was once required for the sensor only!
The name given to this new technology is Chip-In-Oil (CIO). CIO means not only that the entire pressure transmitter is embedded within a hermetically-sealed, oil-filled housing, but that this transmitter can then be seamlessly integrated into the OEM product, achieving cost savings and system performance not possible with other, conventional technologies.
Piezoresistive Pressure Transmitter Series 21 C
For Industrial Applications, Ratiometric Output
The C-series transmitters are noted for their ability to deliver high accuracy over a wide temperature range. This is achieved by means of mathematical modelling of the sensor characteristics and digital compensation. In order to do this, each transmitter is gauged over pressure and temperature, programmed and checked after calibration in the same test set-up.
The modular design of the Series 21 C and the extensive vertical range of in-house manufacture provide a high degree of flexibility. The company can quickly adapt to customer requests, even with large production batches. The extensive standard range of connectors and pressure connections means that a CIO measuring cell (Chip-in-Oil) can be quickly welded in from stock if small numbers are involved, and then calibrated to the required temperature range.
The C-series transmitters are noted for their ability to deliver high accuracy over a wide temperature range. This is achieved by means of mathematical modelling of the sensor characteristics and digital compensation. In order to do this, each transmitter is gauged over pressure and temperature, programmed and checked after calibration in the same test set-up.
The modular design of the Series 21 C and the extensive vertical range of in-house manufacture provide a high degree of flexibility. The company can quickly adapt to customer requests, even with large production batches. The extensive standard range of connectors and pressure connections means that a CIO measuring cell (Chip-in-Oil) can be quickly welded in from stock if small numbers are involved, and then calibrated to the required temperature range.
Differential Pressure Transmitters Series PD-39 X / PD-39 X Ei
The Series PD-39 X does not measure the differential pressure directly − instead, it uses two absolute pressure sensors to take the measurement indirectly. As well as reducing costs, this differential pressure transmitter is also more robust in relation to imbalanced (one-sided) overloading. The differential pressure range should be at least 5% of the standard pressure range. Each pressure side has two pressure connections, so the pressure measurements can be displayed and recorded on a PC or laptop with help of the software Control Center Series30 (CCS30) and interface cable. Export of recordings to standard file formats is possible. Up to 128 devices can be connected in a KELLER Bus-System. An intrinsically safe version Series PD-39XEi is also available.
Digital Manometer ECO 2
Max.- and Min.-Function / Accuracy: 0,5 %FS
ECO 2 is a compact and economical digital pressure measuring instrument providing medium accuracy at high resolution and repeatability. The piezoresistive pressure transducer at the heart of the instrument has gone through extensive pressure- and temperature tests.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.- pressure since the last RESET.
ECO 2 has two operating keys. The left key turns the instrument on and is used to select functions and pressure units. The right key executes the selected function or unit. The right key is also used to switch between the Max.- and Min.-value.
ECO 2 has a 7/16” UNF male thread and is delivered complete with an O-ring seal swivel fitting which allows the instrument to be rotated 360°. Only minimal torque is needed to seal up to 300bar. Process pressure connection is G1/4” male.
Optional accessories:
- Protective rubber covering
- Carrying bag
ECO 2 is a compact and economical digital pressure measuring instrument providing medium accuracy at high resolution and repeatability. The piezoresistive pressure transducer at the heart of the instrument has gone through extensive pressure- and temperature tests.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.- pressure since the last RESET.
ECO 2 has two operating keys. The left key turns the instrument on and is used to select functions and pressure units. The right key executes the selected function or unit. The right key is also used to switch between the Max.- and Min.-value.
ECO 2 has a 7/16” UNF male thread and is delivered complete with an O-ring seal swivel fitting which allows the instrument to be rotated 360°. Only minimal torque is needed to seal up to 300bar. Process pressure connection is G1/4” male.
Optional accessories:
- Protective rubber covering
- Carrying bag
Digital Manometer LEO Record (Ei)
With Record Function
LEO Record is an autonomous battery powered instrument with digital display designed to record pressure and temperature over long periods. Both the piezoresistive LEO Record as well as the capacitive LEO Record (ideal for low pressure ranges) offer the following advantages:
- High measuring accuracy, resolution and robustness
- High data security due to the use of a non-volatile memory
- Display of the actual pressure and the record status
- Recording of the pressure and temperature
- Simple and well structured configuration- and read-out software (Logger 5) for PC or PDA
- Combination of event-controlled recording and interval recording prevents unnecessary data being recorded (i.e. only measuring the pressure changes...)
- Installation data (and comments) of the measuring station can be stored in the instrument
- Pressure connection with G1/4" thread (other threads on demand)
- Intrinsically safe versions available.
LEO Record is an autonomous battery powered instrument with digital display designed to record pressure and temperature over long periods. Both the piezoresistive LEO Record as well as the capacitive LEO Record (ideal for low pressure ranges) offer the following advantages:
- High measuring accuracy, resolution and robustness
- High data security due to the use of a non-volatile memory
- Display of the actual pressure and the record status
- Recording of the pressure and temperature
- Simple and well structured configuration- and read-out software (Logger 5) for PC or PDA
- Combination of event-controlled recording and interval recording prevents unnecessary data being recorded (i.e. only measuring the pressure changes...)
- Installation data (and comments) of the measuring station can be stored in the instrument
- Pressure connection with G1/4" thread (other threads on demand)
- Intrinsically safe versions available.
Digital Manometer LEO 1
With Peak Recording
LEO 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated fast peak-, max.- and min.-function.
The instrument is used in two modes:
Mano-Mode:
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the MAX.- or MIN- pressure since the last RESET.
Peak-Mode:
The pressure is measured 5'000 times per second and is brought to the display twice per second. The top display shows the actual pressure, the bottom display the peak- (MAX.) or trough-pressure (MIN.).
Also available as intrinsically safe version (LEO 1 Ei).
LEO 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated fast peak-, max.- and min.-function.
The instrument is used in two modes:
Mano-Mode:
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the MAX.- or MIN- pressure since the last RESET.
Peak-Mode:
The pressure is measured 5'000 times per second and is brought to the display twice per second. The top display shows the actual pressure, the bottom display the peak- (MAX.) or trough-pressure (MIN.).
Also available as intrinsically safe version (LEO 1 Ei).
Digital Manometer LEO 2 / LEO 2 Ei
Max.- and Min.-Function / Accuracy: 0,1 %FS
LEO 2 is a compact, micro-processor (µP) controlled, highly accurate and versatile pressure measuring instrument with digital indication. The piezoresistive pressure transducer as the heart of the instrument has gone through extensive pressure- and temperature tests. Its characteristics are stored in the instruments internal EEPROM. The µP of the LEO 2 reads the characteristic values and calculates therefrom the pressure to an accuracy of < 0,1 %FS at room temperature.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.- pressure since the last RESET.
Also available as intrinsically safe version (LEO 2 Ei).
LEO 2 is a compact, micro-processor (µP) controlled, highly accurate and versatile pressure measuring instrument with digital indication. The piezoresistive pressure transducer as the heart of the instrument has gone through extensive pressure- and temperature tests. Its characteristics are stored in the instruments internal EEPROM. The µP of the LEO 2 reads the characteristic values and calculates therefrom the pressure to an accuracy of < 0,1 %FS at room temperature.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.- pressure since the last RESET.
Also available as intrinsically safe version (LEO 2 Ei).
LEX 1: Highly Precise Digital Manometer
Precision : 0,01 %FS*
LEX 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated Max.-/Min.-function for calibration and testing purposes.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.-pressure since the last RESET.
LEX 1 has two operating keys. The left key is to turn the instrument on, to select the functions and the pressure units. The right key executes the selected function resp. unit or serves to display the Max.- and Min.-value.
Also available as intrinsically safe version (LEX 1 Ei).
LEX 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated Max.-/Min.-function for calibration and testing purposes.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- or Min.-pressure since the last RESET.
LEX 1 has two operating keys. The left key is to turn the instrument on, to select the functions and the pressure units. The right key executes the selected function resp. unit or serves to display the Max.- and Min.-value.
Also available as intrinsically safe version (LEX 1 Ei).
Digital Manometer LEO3
Bus-capable / Programmable 4…20 mA Output
LEO 3 is a micro-processor based transmitter with digital double-display for pressure (top display) and for the output signal (bottom display). The display is powered from the 4...20 mA current loop. Functions:
MAX/MIN: Activating the right key brings the Max.- and Min.-values to the lower display. After 5 seconds, the analog signal is indicated again.
RESET: The Max.- and Min.-values are set to actual.
ZERO SET: The zero is set to the applied pressure.
ZERO RES: Restores the instrument back to factory settings.
UNITS: The pressure values can be displayed in different units.
LEO 3 is a micro-processor based transmitter with digital double-display for pressure (top display) and for the output signal (bottom display). The display is powered from the 4...20 mA current loop. Functions:
MAX/MIN: Activating the right key brings the Max.- and Min.-values to the lower display. After 5 seconds, the analog signal is indicated again.
RESET: The Max.- and Min.-values are set to actual.
ZERO SET: The zero is set to the applied pressure.
ZERO RES: Restores the instrument back to factory settings.
UNITS: The pressure values can be displayed in different units.
Piezoresistive Transmitters with Pressure Proof Housing
For Hazardous Applications
These piezoresistive pressure transmitters with pressure proof housing are approved for use in explosion risk areas of group II. They provide stable and accurate measurements of absolute and gauge pressures of liquid and gaseous media in the pressure range between 0,1 and 300 bar.
Analog transmitters, Series 23 Ed and 25 Ed:
This series is based on the stable piezoresistive transducer with analog electronics. The zero point and sensitivity, and the temperature coefficients for the zero point and sensitivity, are compensated by resistors and/or potentiometers.
Digital transmitters Series 33 X Ed and 35 X Ed:
This series features microcontroller-based electronic evaluation to ensure maximum accuracy. Each transmitter is gauged across the entire pressure and temperature range. This provides the basis for calculating a mathematical model that corrects all reproducible errors. The pressure value can be read via the interface and at the same time it is also available in analog form as a 4…20 mA or 0…10 V version.
These piezoresistive pressure transmitters with pressure proof housing are approved for use in explosion risk areas of group II. They provide stable and accurate measurements of absolute and gauge pressures of liquid and gaseous media in the pressure range between 0,1 and 300 bar.
Analog transmitters, Series 23 Ed and 25 Ed:
This series is based on the stable piezoresistive transducer with analog electronics. The zero point and sensitivity, and the temperature coefficients for the zero point and sensitivity, are compensated by resistors and/or potentiometers.
Digital transmitters Series 33 X Ed and 35 X Ed:
This series features microcontroller-based electronic evaluation to ensure maximum accuracy. Each transmitter is gauged across the entire pressure and temperature range. This provides the basis for calculating a mathematical model that corrects all reproducible errors. The pressure value can be read via the interface and at the same time it is also available in analog form as a 4…20 mA or 0…10 V version.
Piezoresistive OEM Pressure Transmitters Series D Ei
With I2C interface for hazardous areas
With the intrinsically safe D-line, KELLER introduces a unique combination consisting of an exceedingly robust industrial pressure transducer and the popular I2C microcontroller interface for applications in strongly hazardous areas of the gas group II (industry applications). Pressure transmitters with this interface are commonly available only in consumer market housings made of plastic or ceramic, where merely the parameters for compensation are stored in an integrated memory. The intrinsically safe D-line OEM transmitters however have an unprecedented embedded digital signal processing (DSP) core for the compensation and normalization of the output values.
Performance features:
• Ultra low power consumption, optimised for battery powered applications
• Hermetically protected sensor electronics − extremely resistant to environmental influences
• Ultra-compact, robust housing made from stainless steel (optional Hastelloy C-276)
• No external electronics for compensation or signal processing
• Extremely accurate, outstanding long-term stability, no hysteresis
• Pressure ranges of 1 bar to 1000 bar
• Easy to integrate into microcontroller based systems
• Internal two-chip solution with pressure sensor and signal processing separation provides a high degree of flexibility
With the intrinsically safe D-line, KELLER introduces a unique combination consisting of an exceedingly robust industrial pressure transducer and the popular I2C microcontroller interface for applications in strongly hazardous areas of the gas group II (industry applications). Pressure transmitters with this interface are commonly available only in consumer market housings made of plastic or ceramic, where merely the parameters for compensation are stored in an integrated memory. The intrinsically safe D-line OEM transmitters however have an unprecedented embedded digital signal processing (DSP) core for the compensation and normalization of the output values.
Performance features:
• Ultra low power consumption, optimised for battery powered applications
• Hermetically protected sensor electronics − extremely resistant to environmental influences
• Ultra-compact, robust housing made from stainless steel (optional Hastelloy C-276)
• No external electronics for compensation or signal processing
• Extremely accurate, outstanding long-term stability, no hysteresis
• Pressure ranges of 1 bar to 1000 bar
• Easy to integrate into microcontroller based systems
• Internal two-chip solution with pressure sensor and signal processing separation provides a high degree of flexibility
Intrinsically Safe Piezoresistive Pressure Transmitters
For Gas and Dust Atmospheres
These piezoresistive pressure transmitters are approved for use in highly explosion risk areas of group II (gas and dust).
The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each field and programmed into the additional circuit. During operation, these values are fed into the analogue signal path depending on the temperature. Each temperature is the ”calibration temperature” for this transmitter. The accuracy thereof is mainly determined by linearity. 120 fields are available, representing a possible temperature range of 180 K. The wider the temperature range, the greater the amount of testing that is needed to minimise the inaccuracy of the mathematical model.
These piezoresistive pressure transmitters are approved for use in highly explosion risk areas of group II (gas and dust).
The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each field and programmed into the additional circuit. During operation, these values are fed into the analogue signal path depending on the temperature. Each temperature is the ”calibration temperature” for this transmitter. The accuracy thereof is mainly determined by linearity. 120 fields are available, representing a possible temperature range of 180 K. The wider the temperature range, the greater the amount of testing that is needed to minimise the inaccuracy of the mathematical model.
Piezoresistive Low-Cost Level Transmitter Series 26 Y
Absolute and Relative Pressure
The pressure transmitters Series 26 Y are used in water level measurements that are price-sensitive but still require considerable accuracy.
With the Series 26 Y, the monocrystalline silicon measuring cell is reliably protected from the measuring medium by a stainless steel diaphragm. The steel diaphragm itself is protected from mechanical influence by a plastic cap, and has outstanding.
The pressure transmitters Series 26 Y are used in water level measurements that are price-sensitive but still require considerable accuracy.
With the Series 26 Y, the monocrystalline silicon measuring cell is reliably protected from the measuring medium by a stainless steel diaphragm. The steel diaphragm itself is protected from mechanical influence by a plastic cap, and has outstanding.
Highly Precise Level Transmitters Series 36 X W
Digitally Compensated / Rangeable / Digital and Analog Output
This Series is based on the stable, piezoresisitive transducer and a micro-processor electronics with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the sensor are mathematically compensated. With the READ30 software and the KELLER cable K-107, the calculated pressure can be displayed on a Palmtop, Laptop or PC. The READ30 software also allows the recording of pressure signals and the graphic display on the PC. Up to 128 transmitters can be hooked together to a Bus-system.
Programming:
Pressure measurements can be displayed and recorded on PC or Laptop with help of the software ControlCenterSeries30 (CCS30) and a seriel interface cable. Export of recordings to usual file formats possible. Up to 128 devices can be connected together into a KELLER Bus-system.
This Series is based on the stable, piezoresisitive transducer and a micro-processor electronics with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the sensor are mathematically compensated. With the READ30 software and the KELLER cable K-107, the calculated pressure can be displayed on a Palmtop, Laptop or PC. The READ30 software also allows the recording of pressure signals and the graphic display on the PC. Up to 128 transmitters can be hooked together to a Bus-system.
Programming:
Pressure measurements can be displayed and recorded on PC or Laptop with help of the software ControlCenterSeries30 (CCS30) and a seriel interface cable. Export of recordings to usual file formats possible. Up to 128 devices can be connected together into a KELLER Bus-system.
Pressure Calibrators
Low-, Medium- and High Pressure
KELLER pressure calibrators are highly accurate calibration instruments which are available for the following pressure ranges: -0,85...10 bar (LPX), -0,85...25 bar (MPX) or 0...700 bar (HPX) (special measurement ranges are available on request).
The pressure generator is accommodated together with the pressure display in a functional housing. The pressure on a test object that is fitted to the calibrator can be built up quickly, and tracking is made easy thanks to the integrated display.
Measurement work is made easier by a wide range of functions, such as setting any desired pressure zero point, display of peak and trough pressure values, or leak measurements.
Furthermore, the applied pressure can be displayed directly on a computer via the integrated interface (USB converter), after which it can be saved and processed or managed in any desired manner.
The calibrator, including accessories, is supplied in a durable carrying case, making it ideal for assignments in the field.
KELLER pressure calibrators are highly accurate calibration instruments which are available for the following pressure ranges: -0,85...10 bar (LPX), -0,85...25 bar (MPX) or 0...700 bar (HPX) (special measurement ranges are available on request).
The pressure generator is accommodated together with the pressure display in a functional housing. The pressure on a test object that is fitted to the calibrator can be built up quickly, and tracking is made easy thanks to the integrated display.
Measurement work is made easier by a wide range of functions, such as setting any desired pressure zero point, display of peak and trough pressure values, or leak measurements.
Furthermore, the applied pressure can be displayed directly on a computer via the integrated interface (USB converter), after which it can be saved and processed or managed in any desired manner.
The calibrator, including accessories, is supplied in a durable carrying case, making it ideal for assignments in the field.
Pressure Transmitters & Pressure Transducers
Product Lines at a Glance
MathMod Compensation: Mathematical modelling of the sensor characteristics allows for accurate compensation and results in a standardized output signal. Depending on the complexity of the modelling or the compensation algorithms, this is practically free of temperature influences and linearity errors.
CiO-Technology: In chip-in-oil technology, the signal conditioning chip is housed with the pressure sensing chip inside the oil-filled housing. As there are no external electronics, more compact constructions are possible, and the products are extremely robust against environmental influences such as moisture, vibrations, shock and EMC.
MathMod Compensation: Mathematical modelling of the sensor characteristics allows for accurate compensation and results in a standardized output signal. Depending on the complexity of the modelling or the compensation algorithms, this is practically free of temperature influences and linearity errors.
CiO-Technology: In chip-in-oil technology, the signal conditioning chip is housed with the pressure sensing chip inside the oil-filled housing. As there are no external electronics, more compact constructions are possible, and the products are extremely robust against environmental influences such as moisture, vibrations, shock and EMC.
Digital Manometers & Display Units
Good reasons for digital piezoresistive manometers
> Maximum class accuracy and repeatability
> No material fatigue in the measuring element − Keyword: Long-term stability
> No plastic deformation in the measuring element −
Keyword: Pressure
> Robust housing, Protection class IP65…66
> No recalibration required after external damage
> Can be recalibrated with software
> Zeroing at the touch of a button
> No reading errors
> High reading accuracy
> Selectable measurement units
> Backlighting possible
> Electrical interfaces possible
> Temperature display possible
> Signal analyses such as min./max. possible
> Measurement data recording possible
> Wide range of pressure ranges up to 2000 bar
> Maximum class accuracy and repeatability
> No material fatigue in the measuring element − Keyword: Long-term stability
> No plastic deformation in the measuring element −
Keyword: Pressure
> Robust housing, Protection class IP65…66
> No recalibration required after external damage
> Can be recalibrated with software
> Zeroing at the touch of a button
> No reading errors
> High reading accuracy
> Selectable measurement units
> Backlighting possible
> Electrical interfaces possible
> Temperature display possible
> Signal analyses such as min./max. possible
> Measurement data recording possible
> Wide range of pressure ranges up to 2000 bar
About us
A leader in the European market, KELLER is a trusted and reputable company with many years’ experience in the manufacturing of pressure measurement products. In fact, we are very proud to say we are Europe’s largest manufacturer of pressure transmitters and sensors as well as global leaders in sensing technology.
Our repertoire includes high quality, cost effective and reliable pressure transducers, pressure transmitters, data loggers, level probes, digital pressure gauges, digital indicators, pressure calibrators, pressure switches and digital manometers.
Accessories are also available for the items already mentioned, and include, batteries, mating connectors, hand pumps, protective rubber coverings and cases, converters, adaptors and software.
We pride ourselves on being comprehensive in both expertise and product. Many areas and industries are covered by our vast product range and includes but is not exclusive to, oceanology, oil and gas, water depth, hydraulics, refrigeration and many more.
With our UK headquarters in Dorset, we are passionate about providing our customer with the best possible service and a quality product of the highest-level. We work together with our customers to design and engineer their own specific product and if your order is of moderate to high volume, we are more than happy to offer a price to reflect that.
Many of our products are piezoresistive and can be found in a variety of different sizes and series. Our pressure measurements range from 10mbar up to 1500bar, products are in standard outputs 4…20mA, 0…10V, 0.5…4.5V and digital RS485 and standard operating temperatures of 10…40°C, -10…80°C and 20…120°C. We can also cater for different requirements. Products also differ in range depending on the industry and/or application.
The entire product range, information and examples of applications can be found on our website along with software, converters and further details about KELLER UK.
Our repertoire includes high quality, cost effective and reliable pressure transducers, pressure transmitters, data loggers, level probes, digital pressure gauges, digital indicators, pressure calibrators, pressure switches and digital manometers.
Accessories are also available for the items already mentioned, and include, batteries, mating connectors, hand pumps, protective rubber coverings and cases, converters, adaptors and software.
We pride ourselves on being comprehensive in both expertise and product. Many areas and industries are covered by our vast product range and includes but is not exclusive to, oceanology, oil and gas, water depth, hydraulics, refrigeration and many more.
With our UK headquarters in Dorset, we are passionate about providing our customer with the best possible service and a quality product of the highest-level. We work together with our customers to design and engineer their own specific product and if your order is of moderate to high volume, we are more than happy to offer a price to reflect that.
Many of our products are piezoresistive and can be found in a variety of different sizes and series. Our pressure measurements range from 10mbar up to 1500bar, products are in standard outputs 4…20mA, 0…10V, 0.5…4.5V and digital RS485 and standard operating temperatures of 10…40°C, -10…80°C and 20…120°C. We can also cater for different requirements. Products also differ in range depending on the industry and/or application.
The entire product range, information and examples of applications can be found on our website along with software, converters and further details about KELLER UK.
