How to choose a gas detector, and what aspects need to be considered?
As a gas leak concentration detection instrument tool, when selecting a gas detector, not only should the gas being detected be considered, but also other aspects should be taken into account.
1. Confirm the type and concentration range of the gas to be detected
If methane and other less toxic hydrocarbons are predominant, LEL detector can be chosen. Because the principle of LEL detector is simple and widely used, it also has the characteristics of easy maintenance and calibration. If there are toxic gases such as carbon monoxide and hydrogen sulfide, priority should be given to selecting a gas detector that corresponds to the gas to be detected. If it is an organic toxic and harmful gas, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amines), ethers, alcohols, lipids, etc., a photoionization detector can be selected. If the gas types cover the above categories, it is recommended to choose a composite gas detector.
2. Determine the usage scenario of the gas detector
If it is in an open environment, such as an open workshop, a portable gas detector that can be worn with you can be used, which can continuously, real-time, and accurately display the concentration of toxic and harmful gases on site. Usually equipped with vibration or light alarm attachments to avoid audible alarms in noisy environments, and computer chips are installed to record peak values and other information, providing specific guidance for worker health and safety.
If entering a confined space, such as reaction tanks, storage tanks or containers, sewers or other underground pipelines, underground facilities, agricultural enclosed grain warehouses, railway tankers, shipping cargo holds, tunnels, etc., personnel must undergo testing before entering, and testing must be conducted outside the confined space. At this point, it is best to choose a multi gas detector with a built-in sampling pump. It can be equipped with multiple gas detection sensors on one instrument, and it has the characteristics of small size, light weight, fast response, and simultaneous display of multiple gas concentrations.
