1. Verify the kind of gas to be detected and the concentration range.
In petrochemical, environmental protection, gas, coal mines, and other industries, gas detectors are frequently utilized. Every person involved in safety and health work should take great care when selecting a gas detector for the various safety production occasions and testing requirements.
Verify the type of gas to be detected and its concentration range. Every production department deals with a particular kind of gas. Consideration must be given to every case when selecting a gas detector. For instance, methane and less hazardous alkanes predominate in the mining environment of coal mines, making a flammable gas detector the obvious choice. This is due to the fact that combustible gas detectors not only have an easy-to-understand and popular detecting principle, but also have convenient maintenance and calibration features.Choose a gas detector that can detect combustible gas, carbon monoxide, hydrogen sulfide, and oxygen simultaneously if there are poisonous gases present, such as carbon monoxide and hydrogen sulfide, to protect personnel. PID photoionization detection should be chosen if there are more organic poisonous and harmful gases present, taking into account the low concentration that may result in human poisoning, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amines), ethers, alcohols, lipids, etc. Never attempt to deal with it with a flammable gas detector as this could cause harm or even death. Choosing a composite gas detector could result in a multiplier effect with a reduction in effort if the gas types cover the aforementioned sorts of gases.
2. Determine the occasion of use
Different industrial environments require different types of gas detectors.
(1) Fixed gas detector
The majority of industrial installations and manufacturing procedures use this detector. To find certain gas leaks, it can be deployed at precise detecting stations. In general, there are two types of fixed detectors. The secondary instrument, which consists of circuits, power supplies, display and alarm devices, is located in a secure location for convenient monitoring, while the detection probe, which is made up of sensors and transmission elements, is installed at the detection site.In terms of technique and technology, the stationary gas detector is better suited for the continuous and long-term stability needed by the detection. Additionally, it must be chosen based on the type and concentration of the gas present on the premises, and special attention must be paid to installing them in the areas where the specific gas is most likely to leak. For example, the effective height of the sensor installation should be chosen based on the specific gravity of the gas.
(2) Portable gas detector
The portable instrument can be transported to various production sites because it is lightweight and simple to use. The new type of combustible gas detector, PID photoionization detector, and Composite detectors use rechargeable batteries (some have adopted memoryless nickel-metal hydride or lithium-ion batteries, so that they can generally work continuously for nearly 12 hours), while the electrochemical sensor detector is powered by alkaline batteries and can be used continuously for 1,000 hours. wide.
