Intended for Thermoelectric Assemblies, SR-54 Series Bi-Directional Programmable Controller features built-in monitoring and control intelligence. Microcontroller-based device drives TEAs to exact temperature set points in cooling and heating mode. Unit accommodates up to 3 NTC thermistors and can control temperature to within ±0.15°C under steady state conditions. With SR-54, alarm features can be programmed to identify problematic fan, thermoelectric module, thermostat, or temperature sensor.