Based on a digital platform, gas detectors for industrial refrigeration include multiple communication and integration options to ease calibration and maintenance. Line of detectors includes models ranging from basic to heavy duty that are able to detect a range of refrigerants. These include ammonia (R-717), CO2 (R-744), fluorinated refrigerants (HCFCs and HFCs), and propane (R-290). The line includes models witha electrochemical, semiconductor, pellistor and infrared sensor technologies. Each gas detector includes analog and RS485 Modbus connections. Stand-alone gas detection units with integrated relays can be directly connected to external systems to activate alarm devices.