Hello, do you know what the output voltage of this device is? Thank you.
great, thanks for the reply. I am using http://www.omega.com/Manuals/manualpdf/M4172.pdf flowmeter. I am using an external 12V power supply for the flowmeter. So i think i can connect arduino gnd to flowmeter gnd and pwr supply gnd, flowmeter signal to arduino digital pin with internal pullup R enabled, and flowmeter power to external power.