How to choose the right gas detector?
1. Confirm the type and concentration range of the gas to be detected
If methane and other less toxic alkanes are mostly, LEL detector can be selected. Because the principle of the LEL detector is simple and widely used, it also has the characteristics of convenient maintenance and calibration. If there are toxic gases such as carbon monoxide and hydrogen sulfide, the gas detector corresponding to the gas to be detected is preferred. If it is an organic poisonous and harmful gas, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amine), ether, alcohol, fat, etc., a photoionization detector can be selected. If the gas types cover the above types of gases, it is recommended to choose a composite gas detector.
2. Determine the use occasion of the gas detector
If it is in an open place, such as an open workshop, you can use a portable gas detector that you can wear, which can continuously, real-time, and accurately display the concentration of toxic and harmful gases on site. Generally, it will be equipped with vibration alarm or light alarm accessories to avoid inaudible sound alarms in noisy environments, and a computer chip will be installed to record information such as peak values to provide specific guidance for workers' health and safety.
If entering a confined space, such as reaction tanks, storage tanks or containers, sewers or other underground pipes, underground facilities, agricultural closed granaries, railway tank cars, shipping cargo holds, tunnels and other workplaces, inspections must be carried out before personnel enter , and the detection should be carried out outside the confined space. At this time, it is best to choose a multi-gas detector with a built-in sampling pump. It can be equipped with multiple gas detection sensors required on one instrument, and it has the characteristics of small size, light weight, fast response, and multi-gas concentration display at the same time.
