NI 9422 - Flow Meter - Reed Switch

[cuaerospace]

Hi all,

I am curious if the NI 9422 can accept signals from a flow meter operating on a reed switch. I understand that when operating on this type of sensor (as opposed to a hall effect), no power supply is required. So does the circuit simply send the sensed pulses back to the card for a counter reading (I have the card configured in counter mode).

The spec on the device is that it is a reed switch two wire SPST N/O contact. 

I am asking this because our other flow meters are operating on the hall effect sensor which use a single circuit to both power the flow meter as well as take in the sensed pulses.

I want to know if the card can handle either of these switches.

Thank you.

[FuManWho]

Hi Cuearospace,

I just wanted to clarify that you want to read from the flow meter and not the switch. If you are trying to read from the switch, here is another discussion on the same topic but with a different card:

http://forums.ni.com/t5/Digital-I-O/USB-6501-magnetic-reed-switch-input/td-p/414543

But if you are reading from the flowmeter, this should be fine as you just read in the signal when it is generated.