The Model TSA and Model TF142 Low Limit Temperature Controllers provide low-limit temperature control in operating dampers, valves, compressors, or fan motors in HVAC systems and Building Automation Systems, BAS. Manual and automatic reset model temp controllers are available with SPDT or DPDT switching action. Models TSA and TF142 respond to the lowest temperature sensed along any 1' (0.3m) section of the capillary element.