Posted 3/26/2020 10:26 (#8140093 - in reply to #8140065) Subject: RE: Any way to get Fan speed and low bin level sensors into Ag Leader planter monitoring?
Central, IA
I'm going to assume that your fan has some sort of pulse sensor on it. It most likely takes 12 volts and either sends a 12v+ or a ground signal into the harness when it reads a pulse.
Here is a $70 battery powered tach display that can take a voltage or ground signal. It doesn't really do any math, so the rpm sensor would need to read 1 pulse per rev.