Dissolved oxygen data acquisition

[Capega]

Hi

The Whistone brige module is when configured in full or half bridge, doesn't it?

If I connect the sensor in the voltage mode is also a Whistone bridge?

The manufacturer send me some information about the outpus signal of the sensor, they say its signal is between 33 and 66 nA (nanoamperes),

is there a trouble in connecting that signal to the NI 9219 in voltage mode?

Thank you 

Kind Regards

Capega

[lfelias]

Hey,

I don't think you can do that, if you connect directly this voltage you can damage the module, because the way it works internally it amplify the voltage created by the difference of resistor in the bridge.

You might need to know exaclty the value of voltage range that the module works, and condition the sensor to output that voltage. Also I am not that sure that this will work.

I strongly recommend you to use a voltage reader module instead.

[Denise_King]

Hello,

I need to record the current change vi NI9219, but first I need to apply a constant voltage to the 2-wire sensor.

I could create a analog signal (constant voltage) in signalexpress as I want and acquire data from NI9219, but how can I apply the constant voltage to the sensor so that I can record the current change?

Thanks a lot!