I have a server room with an air conditioning unit. The unit is supposed to run 24x7, but ND tends to get 100 °F in the summer and -40 °F in the winter. This is a little harsh on the equipment and we have had failures. I have a temperature sensor, but I want a little more warning.
I am trying to cook up some solution that monitors the air flow and sends an e-mail when the air stops. I have looked at various anemometer (wind speed indicators), but they all seem to log data and not provide updates, plus they all seem to be rather large and not a good thing to have spinning in a server room. I want to hang the sensor from the ceiling in front of the air conditioner.