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Bridge nominal Resistance

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Hi, my name is Emre. I using omega pressure transducer (PXM419-001BCG10V) for detect cavitation. Also I am using LabVIEW DAQMX. When I write a code, LabVIEW ask me Bridge Nominal Resistance of Pressure Transducer. I looked specification there is some value about (input/output resistance 5000 ohm %20 ). No nominal resistance. How can I find it ? I attached the specification pdf.
Thank you.

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Message 1 of 6

The part number you posted says your sensor outputs a 0-10V signal.


That means you should be using a regular analog input module, not a bridge input module.  The underlying bridge in that sensor is irrelevant to you.

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Message 2 of 6

But this  sensor piezoresistive Pressure Transducer ? And piezoresistive sensor have the wheatsone bridge. Where is used the bridge resistance in Labview ? By the way I'm new to  labview and this subject. Thanks for return.

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Message 3 of 6

Hi e.,


And piezoresistive sensor have the wheatsone bridge.

Usually yes ("Wheatstone").

But that sensor also comes with integrated electronics, amplifiers, and so on.


Where is used the bridge resistance in Labview ?

Nowhere - because that electronics handles all for you.

You get a "standard" signal of 0-10V, so use a simple voltage measurement!

Best regards,

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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Message 4 of 6
Accepted by topic author e.aydeniz

Yes.  The sheet says it is piezo-resistive.  It doesn't say that is has a Wheatstone bridge, but typically resistive sensors do.


But you are missing the point that the model of sensor you listed has other circuitry to read that resistive part and convert it to a 0-10V DC output.  All DAQmx and LabVIEW care about is that you are reading a voltage analog input.  They don't care what happens in the sensor before that.  Just read the voltage and multiple it by the 1 bar/10V range that the sensor is sized for.  (I don't know exactly what they mean by "compound" gage and bidirectional output.  That could possibly change the scaling factor somehow.)


Go back and re-read your original message thread.   Bob, in message 2, bullet point #2, sub #1, asks you to find out about this very topic.

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Message 5 of 6

OK. I understand. Thank you.

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Message 6 of 6