Solid-state pressure switch resists vibration
A
Gems Sensors product story
Edited by the Engineeringtalk editorial team
Jun 9, 2004
The new PS98 series of pressure switches uses solid-state transducer technology to resist the damage that shock and vibration can cause to mechanical switch units.
The new PS98 series of pressure switches uses solid-state transducer technology to resist the damage that shock and vibration can cause to mechanical switch units.
Answering industry's demand for solid-state switches, the PS98 series features a polysilicon strain gauge teamed with a custom ASIC to provide accurate, thermal compensated pressure sensing.
The sensing results are used to actuate a solid-state relay or transistor switch.
With no moving parts, the construction is designed to deliver more than 100 million transistor actuation cycles under high shock and vibration conditions.
This makes the PS98 Series ideal for off-road, mobile or other demanding applications.
The new switches are manufactured using Gems proven chemical vapour deposition (CVD) technology, producing extremely stable polysilicon strain gauges.
CVD manufacturing methods bond a polysilicon strain gauge bridge layer to a stainless steel diaphragm at the molecular level to produce a sensor with superior long-term drift.
Repeatability is within 0.25% of the full set point range.
The PS98 pressure switches are an ideal alternative to electromechanical types when switch action exceeds 50 cycles per minute and a broad frequency response is needed.
The modular design allows for a wide range of configurations.
In addition to pressure sensing electronics that range from 0 to 400bar, the PS98 series offers a broad selection of pressure connections and several electrical termination options, including DIN plugs and IP68 cables.
Switch actuation and de-actuation set points are customer specified and set at the Gems factory.
Operating temperatures range from -40 to +125C.
Power requirement is 12 to 32V DC.
The switch body (minus pressure port and electrical termination) is less than 68mm long and 38mm in diameter.
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