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pressure sensor measures pressure, typically of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area. A pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed. For the purposes of this article, such a signal is electrical.

Pressure sensors are used for control and monitoring in thousands of everyday applications. Pressure sensors can also be used to indirectly measure other variables such as fluid/gas flow, speed, water level, and altitude. Pressure sensors can alternatively be called pressure transducerspressure transmitterspressure senderspressure indicatorspiezometers and manometers, among other names.

Pressure sensors can vary drastically in technology, design, performance, application suitability and cost. A conservative estimate would be that there may be over 50 technologies and at least 300 companies making pressure sensors worldwide.

There is also a category of pressure sensors that are designed to measure in a dynamic mode for capturing very high speed changes in pressure. Example applications for this type of sensor would be in the measuring of combustion pressure in an engine cylinder or in a gas turbine. These sensors are commonly manufactured out of piezoelectric materials such as quartz.

Brand: Chinese Model: SEN-037
Overview BMP085 is a digital pressure sensor. Its absolute accuracy can reach 0.03hPa and power consumption is extremely low with current of only 1μA when operating in standard mode. BMP085 adopts ultra-thin 8-pin ceramic leadless chip carrier (LCC) package, which can be connected direc..
Brand: Chinese Model: SB3111-C-1-21M- M12-X1.5-S-ZC1- CW
  Specs:- pressure range: 21MPa; Output signal: 4 ~ 20mA; power supply (9 ~ 40) V.DC; mechanical interface:. M12X1.5  Operating temperature range: (-40 ~ 85) C °..
Brand: Chinese Model: SEN-029
Specifications Model: YB-131 Series compact pressure transmitter Housing Material: All stainless steel 304 Tab Size: M20 × 1.5 (non-calibration done) Measuring range: -0.1-0-100mpa (within range options) Accuracy class: 0.5 0.2 can be customized Core: Imported diffused silicon chip Current output: 4..
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