The Current Transducer Device (CTD) Series of analog output current transducers are nonintrusive devices designed to monitor current flowing through a cable or wire. These units are a cost‑effective solution for monitoring load or proof of operation. The current transducers are ideal for monitoring current loads on pumps, driving fans, and blowers, and sensing the status of heating coils and lighting. CTD devices used for load trending over time are effective sensors for predictive maintenance programs.