Keller pressure transmitter

This piezoresistive pressure transmitter fits 19 mm (3/4”) manifold pressure ports for applications in bio-reactors or autoclaves. The transmitter is compensated up to 150 °C and may be operated continuously or sterilised at this level, including the special circuit electronics. The transmitter circuit is based on the “PROGRES” programmable KELLER amplifier. In the 25HT-PRO version, the programming leads are taken to the 7-pin connector, thus allowing to reprogram the transmitter at any time, altering the zero and the range by a factor of 5, using the hand held PP-96 Progres Programmer. The cable outlet version does not provide these control lines and cannot be reprogrammed. The transmitters are normally supplied in absolute versions. Gauge versions are available upon request. SPECIFICATIONS Pressure Ranges (FS) Version Absolute / Gauge 0,5 1 2 5 10 20 bar Overpressure 2 3 4 8 15 30 bar Typ 2-Wire 3-Wire 3-Wire Excitation (U) 8…28 VDC 8…28 VDC 13…28 VDC Signal Output 4…20 mA 0…20 mA 0…10 V Load Resistor (Ω) ≤(U-8V)/0,02A ≤(U-5V)/0,02A >2kΩ Linearity 0,2% FS typ. 0,5% FS max. Stability 0,1% FS typ. 0,2% FS max. Operating Temperature 20…150°C - Temp. Coeff. of Zero 0,

This piezoresistive high temperature transmitter (-transducer) is suited for media temperatures up to 300!aC. The pressure, acting onto the flush diaphragm, is transferred over an oil-fille capillary onto the silicon measuring cell. The capillary has the function of a cooling spiral. When measuring media with temperatures of 300!aC, the temperature at the silicon cell onl increases by 100!aC. The integrated amplifier electronics provide a voltage- or current signa proportional to the pressure. For highly aggressive media, KELLER offers pressure ports in different materials. SPECIFICATIONS PA(A) 25HTC PAA: Zero at Vacuum   PA: Zero at 1bar absolute PR-25HTC PR:   Vented Gauge Pressure Ranges0,20,51,02,05,0102025bar Overload2,52,53,05,07,5153030bar PAA: Zero at Vacuum   PA: Zero at 1bar absolute PA(A) 25HTC Pressure Ranges501002004006001000bar Overload751503005007001100bar Linearity Error<0,5%FS (optional 0,2%FS and 0,1%FS) Media Temperature25!-300! T.C. of Zero<0,03%FS/!a T.C. of Sensitivity<0,02%FS/!a Frequency Rangetyp. 50 Hz (function of media temperature) Insulation>10 M @ 50 V 2-Wire 3-Wire Excitation13...28V10...28

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. With the READ30 software and the KELLER cable K-107, the calculated pressure can be displayed on a Laptop or PC. The READ 30 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. 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. Programming With the KELLER software READ30 and PROG 30, a RS485 converter (i.e. K102 or K107 from KELLER) and a PC, the pressure can be displayed, the units changed, a new gain or zero set. The analog output can be

These piezoresistive pressure transmitters are approved for use in hazardous areas of groups I (mining industry) and II (industrial applications) where there is a high risk of explosion. Signal processing This series features microcontroller-based electronic evaluation to ensure maximum accuracy. Each transmitter is gauged across the entire pressure and temperature range. This measurement data is used to calculate a mathematical model that enables correction of all reproducible errors. In this way, KELLER can guarantee high accuracy as an error band within the overall compensated pressure and temperature range. Two compensated temperature ranges are available for industrial transmitters, according to choice: -10…80 °C and 10…40 °C. The level probes are gauged in the 0…50 °C temperature range only. The calculated pressure value can be read via the interface, and is simultaneously processed as an analog signal. Interface The interface is designed as a robust RS485 half-duplex for 9’600 and 115’200 baud. It can be used to implement bus systems with 128 subscribers and line lengths of up to 1400 m. There is an external leadthrough for the interface on all products except the version w

Piezoresistive pressure transmitter for applications in bio-reactors or autoclaves. The transmitter is compensated up to 150 °C and may be operated continuously or sterilised at this level, including the special circuit electronics. The transmitters are supplied in absolute or gauge versions, with current or voltage output. The sensing component is a micro-machined silicon pressure chip of high sensitivity. An independent temperature sensor is integrated on the surface of the silicon chip. Digital Output of Transmitter These Series are 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 Transmitter with Analog Output The micro-processor integrates a D/A converter of 16 bit for analog signal outputs of 4…20 mA or 0…10 V. The output rate is 100

This piezoresistive high temperature transmitter is suited for media temperatures up to 300°C. The pressure, acting onto the flush diaphragm, is transferred over an oil-filled capillary onto the silicon measuring cell. The capillary has the function of a cooling spiral, allowing media temperatures of up to 300°C. The temperature of the electronics, which can be read out with the PROG30 software, may not exceed 120°C. For highly aggressive media, KELLER offers pressure ports in different materials. Digital Output of Transmitter These Series are based on the stable, piezoresisitive transducer and a micro-processor electronics with integrated 16 bit A/D converter. Temperature dependencies and nonlinearities 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. Transmitter with Analog Output The micro-processor integrates a D/A converter of 16 bit for analog signal outputs of 4…20 mA or 0…10 V. The output rate i

In applications where the differential pressure is more than 5% of the maximum standard pressure range, differential pressure measurement with two absolute pressure sensors offers major advantages over conventional methods of differential pressure measurement (such as the Series PD-10). 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 unbalanced (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 PD-39 X is easy to use in pressure lines. So that the differential pressure can also be measured exactly if the standard pressure range/ differential pressure ratio is high, this series also features the tried-and-tested microprocessorbased technology that is used in Series 30 X. All reproducible pressure sensor errors (i.e. nonlinearities and temperature dependencies) are entirely eliminated thanks to mathematical error compensation. The sensor signals are measured with a

DESCRIPTION The Econoline by Keller America is a general purpose pressure transmitter intended for almost any application involving aggressive media and where small size, weight, and low cost are required. This proven design utilizes a media isolated, piezoresistive silicon sensor, a design known to be highly reliable in thousands of applications around the globe. Combined with state-of-the-art signal conditioning electronics, the result is a robust transmitter that will provide trouble free service and accurate results. For more information on the Econoline, or any other Keller product, please con-tact Keller America, or view the entire FEATURES 316L Stainless Steel construction for compatibility with aggressive media. Full scale ranges from 5 to 10,000 PSI 2-year warranty covers defects in materials and workmanship. Industry standard outputs simplify interface to controls, data collection, and telemetry systems. Built in the U.S.A. ARRA Section 1605 Compliant. Standard 3 day lead time APPLICATIONS Pump control Tanks level measurement Pipeline pressure measurement Hydraulic pressure monitoring SPECIFICATIONS Available ranges      Relative 0 - 5

DESCRIPTION The Preciseline by Keller America pro-vides standard features that far exceed those of comparably priced transmit- ters by combining proven piezoresistive silicon sensor technology with Keller!ˉs state-of-the-art  signal conditioning cir- cuitry. The result is outstanding !à0.25% FS standard (!à0.1% optional) Total Error Band (TEB) accuracy over a wide com- pensated temperature range. The ability of the Preciseline to provide this level of sustained performance over a wide range of operating condi-tions makes it ideally suited to pressure monitoring applications such as tank level measurement, pump control, and VFD control. Plus, guaranteed lightning protection makes this transmitter ideal for installation in areas prone to chronic damage due to transients caused by lightning. FEATURES 4...20mA models include guaranteed  lightning protection at no additional cost.16-bit internal digital error correction for cost-effective low Total Error Band (TEB) 316L stainless steel construction 2-year warranty covers defects in mate- rials and workmanship. User-rangeable analog output ensures compatibility as requirements change. RS485 modified-MODBUS compatible

DESCRIPTION The Valueline by Keller America provides standard features that far exceed those of comparably priced transmitters by combining proven piezoresistive silicon sensor technology with Keller! state-of-the-art signal conditioning circuitry. The result is outstanding !à0.25%. FS standard (!à0.1% optional) Total Error Band (TEB) accuracy over a wide compensate temperature range. The ability of the Valueline to provide this level of sustained performance over a wide range of operating condi- tions makes it ideally suited to pressure monitoring applications such as tank level measurement, pump control, and VFD control. Plus, guaranteed lightning protection makes this transmitter ideal for installation in areas prone to chronic damage due to transients caused by lightning. FEATURES 4...20mA models include guaranteed lightning protection at no additional cost. 16-bit internal digital error correction for cost-effective low Total Error Band (TEB)316L stainless steel construction 2-year warranty covers defects in mate- rials and workmanship. Standard outputs simplify interface to controls, data collection, and telemetry systems. Various electrical connections for ea

Series 23 (S) Ei, 25 (S) Ei and 26 Ei pressure transmitters are all ATEX approved for use in Hazardous Areas where there is a high risk of explosion. Series 23 Ei / 26 Ei The Series 23 Ei / 26 Ei achieve high stability (especially in low pressure ranges) with large piezoresistive capsules and stress-free, floating mountings with O-rings. Series 23 S Ei / 25 Ei / 25 S Ei The 23 S Ei / 25 Ei / 25 S Ei offer a complete range of „Ported“ and „Flush Diaphragm“ pressure transmitters for ranges of 1bar and above. Still giving high stability and accuracy but without any internal O-rings. This is achieved using either an all welded 316L stainless steel housing and diaphragm or an all welded 316L housing fitted with a brazed Nickel diaphragm. – A complete range Absolute, barometric, gauge (positive and negative). 16 nominal pressure ranges. Current or voltage output. – Flexibility A modular concept is used, with fast and economical production achieved by using off-theshelf sensors. Numerous options and variations are available to meet customers’  specific requirements: Pressure ranges, mechanical- and electrical interface, process- and plug connection, signal outputs etc. – Reliabil