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SOI technology extends life of melt pressure sensor
Traditional transducers for measuring the pressure of plastic melt extrusion use mercury or oil filled capillaries to isolate the sensing element from the very high media temperature and require a relatively thin isolation diaphragm to transmit the pressure through the fluid.The IMPACT melt pressure transducer has no mercury or oil filling but instead incorporates a new 'Silicon on Insulator' (SOI) strain gauge sensing element which can withstand very high temperatures without any need for capillary isolation which degrades the accuracy, stability and sensitivity of the sensing element.
The SOI chip is positioned directly behind a process contact membrane which exploits the high stability qualities of silicon strain gauge technology to provide a more stable reading requiring less re-calibrations over time.
The very high gauge factor properties of the SOI pressure sensor chip have made it possible to use a process contact membrane that is 15x thicker than the ones used in traditional plastic melt pressure sensors and thus offer much greater abrasion resistance with a much more robust mechanical design extending operating life of the sensor.
The IMPACT high temperature pressure transmitters can work with process temperatures up to 350 Deg C in direct contact with the contact membrane and achieve a total error band of better than +/-2.5% of full scale over a wide process temperature range of +20 to +350 Deg C.
The IMPACT plastic injection pressure sensor is available with a 4-20mA current output (IE), or with a 5V or 10V (IN) amplified voltage output.
The IMPACT melt pressure transducers offer a major improvement in performance for users of plastic extrusion moulding machines with a longer life for their sensors and improved accuracy & stability of process measurements.
Related Products
Technical info for the IMPACT pressure transducer
Technical info for the IMPACT pressure transmitter
Plastic melt pressure transducers and transmitters
High temperature media compatible pressure sensors
Flush diaphragm pressure sensors for highly viscous liquids
Pressure sensors grouped by sensing technology
Associated Topics
Measuring the pressure of viscous media
Sanitary pressure transmitter for measuring food processing media up to 300 degC
Site Last Updated: 04/02/12
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