What is the selection process for a fixed gas detector?
How to correctly select a fixed gas detector is very necessary for safety inspection personnel? Different production occasions will contain different flammable, toxic and harmful organic gases. So it is very important to choose the correct fixed gas detector. Shenbei Technology Department will introduce some specific situations for your reference.
1. If there are mostly methane and other less toxic alkanes, it is undoubtedly the most appropriate to choose the LEL detector. The detection principle of combustible gas is catalytic combustion, which is a very common detection principle. It is also very convenient for instrument calibration. Because this technology is relatively mature, domestic gas detectors can also meet user requirements.
The following are domestic recommendations for domestic and imported fixed gas detectors that have been well received by users: JL268D, JL269 leak detector, ADY-1, and HL-200 series users have also responded relatively well. Import recommendations: American Huarui FGM and SP series fixed gas detectors; Canadian BW company's MC-W combustible gas alarm; Honeywell Honeywell's ImpulseX1 detector; COMCOS New Universe XP-3110 detector, XP-3160 Pump-type alarm, XP-3140 leak detector; RAE Huarui miniEX portable combustible gas detector; OLDHAM EX2000 detector; Drager PAC EX2, X-am 2000 combustible gas alarm. If there are some toxic gases such as carbon monoxide, hydrogen sulfide, ammonia, oxygen, hydrogen, phosphine and other gases, it is necessary to give priority to a portable single toxic gas detector or a portable multi-gas detector to ensure the safety of workers. Toxic gas detectors use electrochemical principles for detection. Toxic gas detectors based on electrochemical principles usually measure concentration in ppm units. Note: When detecting these poisonous gases, in addition to carbon monoxide and oxygen, domestically produced poisonous gases can be considered. For other poisonous gases, it is recommended to use imported instruments. Import recommendations: BW single poisonous gas alarm GAXT series; Honeywell ImpulseXP single detector; Insco T40 Detector; Oldham TX2000 single detector; Dräger Pac 5000, pac7000, pac III single poison gas alarm. . If there are more organic toxic and harmful gases, considering the low concentration that may cause human poisoning, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amines), ethers, alcohols, lipids, etc., photoionization should be selected. detector instead of using the LEL detector as this may result in personal injury or death. Import recommendations: American Huarui PGM-7360 benzene detector, PGM-30 detector, PGM-7320TVOC detector, PGM-7340VOC detector, Canadian BW company M5 detector and British ion organic detector.
If the gas type covers the above categories of gases, choose a composite gas detector. This detector requires the gas composition of the measured space, so that the sensor instrument can be better configured.
