Providing isolated and linear 4–20mA output proportional to input, THZ3 and TDZ3 are 2-wire transmitters configurable to accept direct signal input from diverse sensors and analog devices. In addition to enabling backup and fail-over protection, dual sensor input allows 15 transmitters to be multi-dropped on one digital HART® loop to monitor 30 temperature points. Other features include average and differential measurement, 20-bit input resolution, and sensor drift and corrosion detection.