Ventis Pro4 can be used with four of the following sensors: LEL/CH4, O2, CO, CO/H2 Low, H2S, SO2, NO2 or HCN. Ventis Pro5 detects up to five gases, including any covered by the Pro4, as well as ammonia (NH3), CO2/hydrocarbon IR, CO2/CH4 IR and CO/H2S. The monitors are intended for use in industries such as oil and gas, petrochemical, power generation, metal and coal mining, gas utilities and industrial refrigeration. Features include proprietary iAssign technology that tracks users and sites in real-time using near field communication (NFC) to help safety managers identify and address jobsite gas hazards and improve asset management. A dedicated panic button and man-down alarm help to alert nearby workers when someone is in distress or has lost consciousness.