Allen-Bradley 837-A3X706 Temperature Controller

Allen-Bradley 837-A3X706 is an electro-mechanical temperature control switch from Rockwell Automation, part of the 837-A family. This Style A device uses a remote bulb and capillary sense line to monitor process temperatures away from the control body and actuates a mechanical switch to regulate heating or cooling equipment; it is an open-type enclosure (not housed in a separate metal or plastic case). The unit is configured with a 125°F setpoint and is intended for industrial environments where remote sensing and rugged, maintenance-friendly operation are required, such as commercial ovens, thermostatically controlled heaters, or temperature-controlled process equipment. As a legacy, electro-mechanical control, it provides straightforward on/off switching without electronics, designed for compatibility with standard 837-A control circuits used in older Rockwell/Allen-Bradley installations.