Keller pressure transmitter

Series 22 offers a reliable cost effective solution for customers requiring medium to high  quantities, of mass produced transmitters. Utilising the KELLER automatic brazing lines, this new technology allows crevice-free construction of the pressure port with no internal seals or O-rings, making possible high volumes at low cost. In the brass 22 M, a steel insert and a nickel diaphragm are brazed into a brass housing. In the steel 22 S, all parts are stainless steel (AISI 316 L). The glass feed-through header and silicon pressure sensor are welded to the steel insert underneath the oil illing. The electronic circuit is itted to the Packard plug. EMC-protection-components are mounted on the plug side, the ampliier on the sensor side. A lexible printed circuit !°TAB!± connects the senso. Series 22 M 3/8!±-24 UNF-2 with the electronics. The transmitters are designed to have exceptionally good EMC ratings and operate over a wide temperature band, ideal for automotive, hydraulic and refrigeration control applications. Speciications    Pressure Ranges PAA-22 M  /  PAA-22 S   5  10  20  30      bar PA-22

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 (see reverse). The values can be displayed and stored on a PC via an RS485 interface and programming can also be carried out. The transmitters are calibrated to the base range. The PROG30 software permits programming of the analog output signal in each section of the range within the base range (e.g. range 100 mbar. Output 4…20 mA for 20…60 mbar). With KELLER RS converters K-100 Series, up to 128 transmitters can be hooked together into a bus system and read by means of a PC or laptop. READ30 software allows the current pressure of each transmitter to be read or the pressure activity of several transmitters to be recorded or stored whilst “on line”. Specifications    Standard FS Pressure Ranges PR-41 X (relative)  PD-41 X (diff.) 30 100 300 mbar Overpressure 300 1000 1500 mbar Neg. Overpressure 30 100 300 mbar    2-Wire     3-Wire Supply (UB ) 41 X 8…28 VDC   

TheSeries PRD-33 Xwas developed for applications that require a high accuracy differential pressure measurement together with high overload resistance in differential pressure ranges as low as 350 mbar.TheSeries PRD-33 Xis the result of ongoing development of the KELLERPD-33 Xdifferential pressure transmitters. Thanks to a second integrated pressure sensor, the line, or common mode, pressure can now be measured along with the differential pressure, resulting in several notable features not found in traditional differential pressure transmitters.Features- High-accuracy differential pressure measurement with compensated line pressure,dependency- Differential pressure range from 350 mbar to 3 bar- Pressure- and temperature-

The KELLER Series 21 / 21 PRO are extremely reliable and cost effective pressure transmitters. These pressure transmitters use a programmable KELLER-ASIC microchip called!±ProgRes!±  (programmable resistors). The !±ProgRes!± chip enables the transmitters to be up and calibrated using automated test equipment, for improved product quality and lower costs. The PRO versions also have the unique feature that they can be programmed or reranged by the end user, via the hand held PP-96 programmer. Since its first introduction in1989, the Series 21 / 21 PRO was an immediate success, thousands of transmitters and hundreds of programmers are in daily service worldwide.This transmitter uses the KELLERSeries 6 SC capsule as the core. The sensor is a piezo-resistive silicon pressure sensor, mounted in an oil filled capsule. The media pressure is isolated by a stainless steel diaphragm and transferred to the silicon sensor hydraulically via the oil. The !±ProgRes!± circuit has programmable resistor networks, to set the Zero / Gain and therm coefficients. All Series 21 / 21 PRO transmitters are subjected to comprehensive test procedures which cycle both pressure and temperature, the various

Piezo-resistive Pressure transmitter for industrial aPPlications, RatiometRic outPut Technology     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 lexibility. 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. RoHS conformity and comprehensive EMC protection are a matter of course, therefore qualifying the Series 21 C for use in industrial areas. Performance features - Hermetically sealed electronics, extremely compact design - No internal seals, all

Piezoresistive Pressure transmitters for industrial aPPlications series 21 G •  Weighing only 30 grams, the smallest known transmitter with fully welded stainless steel wetted parts •  High EMC protection. Protection class IP65/IP67 •  Highest stability due to special heat treatment and annealing procedures Series 21G, is the result of a 20 year long development programme for industrial transmitters. ‘G’ stands for ‘Graduate’; this product has received ‘summa cum laude’.... the highest honours. The standard mPm electrical connector overlaps the body to remind us of ‘mortar board hats’ on graduation day. The Series 21G combines KELLER’s 30 year long experience of manufacturing industrial pressure transmitters, with all of the newest technological advantages available in the industry today. This product incorporates the very latest techniques for welding, signal processing and circuitry, automated compensation and adjustment. Each transmitter is subjected to temperature and pressure cycles during manufacture. The laser trimming final adjustment gives unrivalled accuracies over a wide temperature range. The result is a cost-effective affordable transmitter that

These piezoresistive silicon pressure transmitters are produced on the new KELLER automatic brazing lines, making possible the mass production of high quality pressure transmitters at low cost.This new technology allows the crevice-free construction of the pressure port without using seals or O-rings. In the brass sensor line (Series 21 MC), a steel insert and a nickel diaphragm is brazed into a brass housing. In the steel sensor line (Series 21 SC), all parts are of stainless steel (AISI 316 L). The header with the silicon pressure sensor and glass lead through pins is welded to the steel insert underneath the oil filling. The tiny chip-on-board amplifier (weight  1 gram) with the KELLER-specific !°PROGRES!± circuit is mounted direct on the glass feed-through pins. It is then encapsulated in silicone compound for humidity and vibration protection. Note: The cable version of the transmitters has exceptionally high RFI protection. SPECIFICATIONS Pressure Ranges (FS) PA Sealed Gauge (zero at 1 bar abs.) 5102050100200bar Series 21 MC Overpressure102040100200300bar Brass Sensor Head, Steel Body 3-Wire 4-Wire 2-Wire Excitation8!-28 V4,75!-5,25 V5!-1 ERIES 21 SC SERIES

This new range of KELLER OEM pressure transmitters offers the user the high accuracy and stability of the KELLER piezoresistive pressure capsule in a low cost OEM package. Applications include refridgeration, hydraulic controls, air compressors, ink jet printers, vacuum pumps etc. The Series 21 R is offered with soldered brass transducers (Series 21 MR), soldered steel transducers (Series 21 SR) or fully welded (Series 21 R), all providing a highly stable measuring cell with negligible hysteresis, unrivalled linearity, high output and a life of millions of pressure cycles. The transmitters are supplied with 2 metres of screened cable, or a square connector and mating plug, type mPm-193. Accuracy is achieved by very large scale predictable production quantities of the pressure  capsule (over 2 million produced today). Reliability is assured by the inherent properties of the perfectly elastic silicon chip, and ensuring that neither the pressure media nor the reference media (in the gauge version) come into contact with any sensitive parts. Temperature Compensation: Each unit is fully tested and compensated. Span errors are re duced by selecting the semiconductor doping leve

Technology:       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 ields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each ield 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 ields 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. Flexibility:  The extent of the vertical range of manufacture, the modular design and the programmable electronics make it possible to manufacture large, customer-speciic batches. The pressure sensors (insulated measuring cells) are manufactured in large quantities and kept in stock. These are then welded into the required transmitter head, equipped with electron

Series 22 DT was developed and homologated specially for use in so-called °∞bivalent vehicles fitted with engines for combined natural gas/gasoline operation. The unconventional design with a small mass swept by the flow results in a fast response with temperature changes, the temperature being measured by an NTC or PT sensor located directly behind the stainless steel separating diaphragm. The same diaphragm transmits pressure via a capillary to a stress-free mounted silicon measuring cell. The signal processing for pressure and temperature is carried out by an electronic module connected to the sensors by flexible conductors. Mounted to the back of the electronic module, which is directly connected to the 6-pole plug connector are the EMC protection components. A special feature is the immunity from interference from electromagnetic fields up to 200 V/m.SPECIFICATIONS Pressure Range PA-22 DT14 bar    Sealed Gauge. Zero at atmospheric pressure (at calibration day) Overpressure25 bar Supply 5 V °?0,25 Output0,5 V°≠4,5V ratiometri Temperature Range-40°≠140 ° Accuracy (compensated range)°?4 %FS(-40°≠0 ° °?2 %F (0°≠90 °, °?4 %FS(90°≠125 ° Isolation @ 45 V10 M

Series 22 offers a reliable cost effective solution for customers requiring medium to high  quantities, of mass produced transmitters. Utilising the KELLER automatic brazing lines, this new technology allows crevice-free construction of the pressure port with no internal seals or O-rings, making possible high volumes at low cost. In the brass 22 M, a steel insert and a nickel diaphragm are brazed into a brass housing. In the steel 22 S, all parts are stainless steel (AISI 316 L). The glass feed-through header and silicon pressure sensor are welded to the steel insert underneath the oil illing. The electronic circuit is itted to the Packard plug. EMC-protection-components are mounted on the plug side, the ampliier on the sensor side. A lexible printed circuit !°TAB!± connects the senso Series 22 M 3/8!±-24 UNF-2 with the electronics. The transmitters are designed to have exceptionally good EMC ratings and operate over a wide temperature band, ideal for automotive, hydraulic and refrigeration control applications. Speciications    Pressure Ranges PAA-22 M  /  PAA-22 S   5  10  20  30      b

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. The Series 23 (S)Y/25 Y product line is outstanding due to its extreme ruggedness towards electromagnetic fields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated fields. · Series 23 Y Ranges 0,2…2 bar Floating mounted sensor. Internal O-Ring. · Series 23 SY Ranges 1…1000 bar Fully welded (no internal seals) · Series 25 Y Ranges 0,5…100 bar Flush, fully welded. A Compre

These piezoresistive transmitters have been designed for precision applications in industrial environments for pressures ranging from 0,2 to 1000 bar, liquids or gas. Series 23: Male pressure port Series 25:  Flush diaphragm A Complete Range Absolute, barometric, gauge (over- and underpressure) and differential for wet/wet applications. 13 nominal pressure ranges. Current or voltage output. Flexibility A modular concept uses the selection of off-the-shelf capsules, allowing a customised production. Numerous options and variants are available, fully adapted to the customer’s requirements: Mechanical and electrical interface, ports, signal outputs, materials in media contact, oil filling, oxygen-compatibility, special features, flameproof versions…Reliability / Quality These transmitters use the highly stable KELLER Series 10 capsules, proven in millions of applications throughout the world. Each capsule is subjected to severe tests and calibration procedures. The transmitters are manufactured and tested according to ISO 9001 / EN 29001.The type of the transmitter is defined according to the reference pressure: PAA-23/25 Absolute Pressure Transmitter (Zero at 0 bar abs

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. Flexibility The modular structure of this product range allows highly flexible applications and solutions that are tailored to users‘ requirements. Numerous versions are available, for example with different pressure connections, materials and filling oils, or versions for use with oxygen and with special performance characteristics. In addition to the classical analog output signal (Series 23 Ed and 25 Ed), a digital solution based on the successful high-precision Series 30 X transmitters is also available (33 X Ed and 35 X Ed). nalog transmitters, Series 23 Ed and 25 Ed This series is based on the stable piezoresistive transducer with analog electronics. The zero oint 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 el

This transmitter is well suited for use in industrial applications that require good accuracy and high stability. It is designed especially for safety critical applications where media compatibility is paramount. The Series 23S / 25S features a fully welded pressure port construction, no internal O-Rings or seals are used up to 600 bar. The wetted materials are a 316L stainless steel housing and a brazed diaphragm.!¤ Series 23    Male pressure port G1/4!  Accuracy 0,25 %FS (best straight line), optional 0,1 %FS!¤ Series 25   G1/2!± pressure port with lush diaphrag.  Accuracy 0,25 %FS (best straight line), optional 0,1 %FS Series 23 S. A Comprehensive Range Absolute, barometric, gauge (positive and negative pressures). 16 nominal pressure ranges. Current or voltage output. Flexibility A modular concept is used, with fast and economical production achieved by using off-the-shelf Series 7 S and 9 S capsules and Series 6 S sensors.Numerous options and variations are available to meet customers!ˉ speciic requirements: Pressure ranges, pressure ports, signal outputs, electrical connectors, etc.Quality Each transmitter is subjected to severe test-