Watlow SD8C-HFAA-AARG Temperature Limit Controller

The Watlow SD8C-HFAA-AARG Temperature Limit Controller delivers reliable panel-mounted temperature-limit monitoring and overtemperature shutdown for industrial thermal processes. With a 100-240V AC supply and 50/60 Hz operation, this 1/8 DIN, panel-mount controller accepts Universal Input and supports Thermocouple, RTD, or Process inputs, with configurable limit outputs and a dual LED display to clearly indicate status. It is designed for use in industrial ovens, heat-treatment equipment, packaging machinery, and process heating systems, providing accurate temperature limit monitoring and protective shutdown to prevent overheating. The SD8C-HFAA-AARG is part of Watlow's SD Series and carries certifications including UL, CSA, CE, and FM, with a front-panel rating of NEMA 4X / IP65 for durable protection in harsh environments. Common replacements include Omron E5CC and Honeywell UDC3200, reflecting its role in retrofit and safety upgrades performed by maintenance teams, OEMs, and system integrators in industrial automation.