The fixed gas detector monitors industrial operations for hazardous levels of one targeted gas from among 23 toxic and combustible gases, including methane, carbon monoxide and hydrogen sulfide. The unit is Bluetooth-enabled, so it can be set up and maintained remotely using a smartphone app. Using an intrinsically safe smartphone available from the company, a single worker can perform many standard maintenance tasks, including set-up, commissioning, and calibration wirelessly from up to 33 feet away. The detector and the app also can quickly produce system reports necessary for safety and environmental regulatory compliance. The sensor is certified for explosive area applications, and is suitable for wastewater, utilities, power generation, laboratories, and downstream oil and gas operations and applications ranging from laboratories to boiler rooms, and from fuel stations to warehouses. The detector is IP 66-rated and uses a metal enclosure to stand up to rugged use, including hosedowns.