Product category:
Pressure sensors
News Release from: SensorsOne | Subject: Impact melt pressure sensor
Edited by the Engineeringtalk Editorial
Team on 03 July 2006
Melt pressure sensor handles the heat
Gefran's Impact melt pressure sensor incorporates a silicon on insulator strain gauge sensing element that can withstand very high temperatures.
Available now from SensorsOne, Gefran's Impact melt pressure sensor has no mercury or oil filling Such fluids are typically used to fill the capillaries of traditional melt pressure sensors to isolate the sensing element, but cannot operate at the very high process temperatures used in plastic extrusion machines
This article was originally published on Engineeringtalk on 24 May 2006 at 8.00am (UK)
Related stories
Digital auto-zero and span option for transmitters
Industrial and precision pressure transmitters incorporate versatile zero and span trimmer that removes the need to adjust potentiometers or use handheld terminals to set the 4 to 20mA current output.
Display plugs in for pressure readout
A novel loop-powered display simply plugs-in between the DIN plug and socket of a pressure transmitter to provide a local indication of the pressure reading.
The Impact incorporates a 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 fewer recalibrations 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 can work with process temperatures up to 350C in direct contact with the contact membrane and achieves a total error band of better than +/-2.5% of full scale over a wide process temperature range of +20 to +350C.
The Impact is available as a melt pressure transmitter with 4-20mA current output, or as a melt pressure transducer with 5 or 10V amplified voltage output.
The Impact offers a major improvement in performance for users of plastic extrusion moulding machines with a longer life for their sensors and improved accuracy and stability of process measurements.
• SensorsOne: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
