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The PX-40 Pressure Transducer
The PX-40 is a miniature pressure transducer that output voltage proportional to the measureable pressure range.   The spec sheet for the sensor says that the operational temperature range is from -45 to 125 degrees Celsius.


The PX-40

As you can see it is a 6 pin DIP with a small sampling tubule leading to a small chamber that contains the element which generates voltage proportional to pressure.   See the spec below on how tiny the sensor actually is...
Spec Sheet.

 



The Correlation Between Voltage and Pressure

The spec sheet specifies voltage values for null pressure and the voltage span for the measurable presure range of 0 psi (pounds per square inch) to 100 psi.   This can be summed up by one simple equation as follows:

P(t) = (V(t)-0.5)* 100.0/4.0

The pressure, P(t) is in lbs/in^2. V(t) is the voltage in volts, and its value is dependent on when or at what time the measurement is taken.



Dimensions

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