Sensaphone FGD-0069-DUCT Duct Mount Air Flow Transmitter

This air fl ow transmitter registers the airfl ow speed according to a thermal principal based on the fact that the cooling action of air increases with airspeed. Used with any Sensaphone that will accept a 4-20mA input signal, the device will provide real time data and will cause your Sensaphone to activate an alarm when the airfl ow reaches a set threshold. This is especially useful for monitoring air conditioning in ducts.