The 10Pro II OT single setup controller monitors furnace temperature and provides notice if the temperature exceeds the desired setting. An easy-to-read LED display provides clear visual indication of alarm status, and the unit can also be configured as part of an industrial control panel to sound an audible alarm. Safety features prevent manual overrides to ensure the instrument is only reset when operating conditions return to a safe range. Compatible with all furnace types, the unit is configured for thermocouple universal input connections. It is designed for standard quarter DIN panel mounting and is UL and FM approved. The 10Pro II OT replaces Marathon's discontinued 10Pro L microprocessor controller.