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[June 2007]
Piezoresistive High-Pressure RH Sensor
Kistler Group (Winterthur, Switzerland) reports that in contrast with many other pressure sensors, it is possible to measure hot media up to 300°C directly with the company's RH High-Pressure, High-Temperature Sensor. The unique construction with a special silicon measuring cell does not require any interfering or toxic pressure transmission fluid. Kistler adds that an extremely robust sensor diaphragm enables the sensor to be used even under the most difficult conditions in hydraulic and process applications.The RH-sensor's high sensitivity, its excellent stability, high accuracy and a very high natural frequency provide additional advantages, enabling both static and dynamic pressures to be measured. The sensors are available as absolute pressure types with a Wheatstone bridge output for pressure ranges of between 100 to 3,000 bar. The sensor can be supplied for more stringent requirements with a set of coefficients for digital sensor compensation.
When combined with the external amplifier Type 4618A, the sensor output signal is converted to a common industrial signal. The integral calibration function makes it extremely simple to exchange and adjust the sensor as required. Two individually adjustable limits can be selected for additional process monitoring.
Additionally, an option is available for measuring the temperature as an output signal of 10mV/°C using the same sensor without an integral thermocouple. Depending on temperature range and cable selected, the sensor and amplifier can be installed over 50 metres from each other.
www.kistler.com
ENDS