The Crowcon SMART 3G-D2 is a fixed gas detector and has sensor options to detect more than 50 toxic, flammable and refrigerant gases. The SMART 3G-D2 is ideal for a wide range of industrial applications and harsh environments. The device features non-intrusive calibration and a 4-digit back-lit display for the gas concentration reading, 5 mode status LED and a high visibility multi-colour LED light ring.