Toxic gas detector selection guide
Overview of toxic gas sensors:
Toxic gas sensor is the harmful gas content in the air into the electrical signal equipment. The electrical signal generated by the sensor is processed, amplified and transformed by the electronic circuit to complete the harmful gas content of the display and alarm. It can be seen that the sensor is the root of the harmful gas detection and alarm instrument, the center of the components, its good or bad resolution of the quality of the harmful gas detection and alarm instrument and the function of the target. Sensors used in the field, accept a variety of harsh environments and atmospheric effects, especially fixed instrument sensors, long hours of continuous work, but also explosion-proof and power supply capacity constraints, and therefore very strict on the plea for harmful gas sensors!
Harmful gas detection alarm instrument selection guidelines. (How to choose the toxic gas detector)
1, clear detection intent, select the instrument variety
In short, the detection of harmful gases have two intentions, the first is to measure the explosion, the second is to measure the poison. The so-called explosion detection is to detect the risk of gas content, overspending alarm to prevent the onset of blasting incidents; toxicity detection is to detect the risk of toxic gas content, overspending alarm to prevent staff poisoning. Measure the size of the explosion is 0 ~ 100% LEL, the size of the toxicity is 0 ~ dozens (or hundreds) ppm, the difference between the two is very large.
Risky places harmful gases have three conditions, safe, non-toxic (or low toxicity) combustible; accurate, non-combustible toxic; third, combustible toxic. The first two conditions are simple to determine, the first test explosion, the second test toxicity, the third condition if there are personnel exposed to test toxicity, such as no personnel exposed to test explosion. Explosive selection of combustible gas detection alarm, toxic selection of toxic gas detection alarm.
2, clear detection of the use of selected instrument varieties (portable or fixed)
Production or storage positions for long-time operation of the leakage detection selection of fixed detection alarms; others such as overhaul detection, emergency detection, access to testing and inspection tours such as the selection of portable (or pocket-sized) instruments.
3, clear detection goals, select the best type of instrumentation
Instrument type contains manufacturers, functional objectives and detection principle of the three main elements, selecting the type of instrument to consider the following guidelines: manufacturers to speak in good faith, a good reputation, the quality of production is guaranteed with the technical supervision part of the promulgation of explosion-proof certificates.
