The new 5100-28 combustible IR gas sensor module is designed to utilize infrared technology to monitor for combustible gases over the range of 0 to 100% LEL. Model 5100-28 is the latest addition to the Sentry Gas Risk Management System, designed to provide a comprehensive proactive means to monitor for hazardous gases. It says its rugged module requires minimal maintenance with a calibration check once a year. The 5100-28 interfaces to the Sentry controller via the proprietary digital Sentry bus.
— Sierra Motor Corp.