Motor Speed Sensor The PU Series pick-up is an economical and reliable way to monitor motor speed. The PU pick-up operates at a 5 to 24 volt level producing a sharp square wave output, which may be fed into Dart’s field programmable tachometer, closed-loop control, counter, or any other digital device. The PU pick-up series also includes a quadrature model to monitor both motor speed and direction by providing two square wave output signals 81° out-of-phase. There are two versions of the product: The PU-E is rated for indoor industrial applications. The NEW PU-R is rated NEMA 4/4X for outdoor applications where temperature, humidity, rain and dust are present. The PU-R is also recommended for applications where water wash down is expected. Completely self contained, the PU Series eliminates the alignment hassle found with other devices. Encapsulated sensor head is dust and dirt resistant. An excellent ‘Motor Not Running’ feedback device to plc/SCADA systems.