Allen-Bradley 837-A5A Temperature Control Module

The Allen‑Bradley 837‑A5A Temperature Control Module is a Style A remote‑bulb, capillary temperature control switch designed for inline use in industrial equipment. It offers an adjustable operating range of 140 to 290 °F, with a 3 to 24 °F differential, enabling precise on/off control around a user‑setpoint, and a maximum temperature rating of 340 °F. The sensing assembly uses a 72‑inch capillary length (the capillary length includes the sensing bulb) with a 3‑3/4‑inch sensing bulb, all housed in a compact enclosure measuring 3‑3/4 inches (95 mm). This device is part of the 837 temperature‑control family and is configured for panel mounting within a 3‑3/4 inch enclosure suitable for standard industrial environments. Typical applications include heating and process‑temperature control where remote sensing is desired, such as in ovens, dryers, or other equipment requiring reliable mechanical temperature regulation without electronic sensing.