Three control options allow surface heaters to satisfy heating needs for process heating, freeze protection, laboratory testing and research and development. Model SDX digital PID temperature controller is intended for a laboratory environment or any indoor application where accurate control is required. It has universal voltage from 100 to 240 VAC with a 15 A relay. Model HL101 digital benchtop temperature limit incorporates built-in temperature control to provide current cutoff to existing temperature controllers or devices. It has a plug-and-play design for dry-environment use. Model BH-330 inline and Model BH-510 digital wet-area controllers are designed for use in wet or outdoor areas. Both controllers offer the company’s Fast-Adaptive-Tuning technology, which optimizes the controller to adjust the logic between the setpoint temperature and the actual temperature.