How to choose the right gas detector for the environment you are in
Identify the type of gas to be detected and the concentration range.
Every production department encounters different types of gases. When selecting a gas detector, it is important to consider all possible scenarios. If methane and other less toxic alkanes are predominant, a LEL detector is definitely the right choice. This is not only because the LEL detector is simple and widely used, but also because it is easy to maintain and calibrate. If there is carbon monoxide, hydrogen sulfide and other toxic gases, it is necessary to prioritize the selection of a specific gas detector in order to ensure the safety of workers. If more organic toxic and hazardous gases, taking into account its potential to cause personnel poisoning of low concentrations, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amines), ethers, alcohols, lipids, etc., should choose the previous chapter introduced the photoionization detector, rather than using the LEL detector to cope with the situation, because it may lead to casualties. If the gas type covers the above categories of gases, choose a composite gas detector may achieve twice the result with half the effort.
Determine the use of occasions.
Different industrial environments, the choice of gas detector types are different.
A), fixed gas detector.
This is in the industrial device and production process to use more detector. Yi Yang gas detector can be installed in a specific detection point on the specific gas leakage detection. Yi Yang fixed detector is generally two-body type, there are sensors and transmitters composed of the detection head for the integration of the installation in the detection site, there are circuits, power supply and display alarm device composed of the secondary instrumentation for the integration of the installation in the ** place, easy to monitor. Its detection principle as described in the previous section, only in the process and technology is more suitable for fixed detection requirements of continuous, long-term stability and other characteristics. They should also be selected according to the type and concentration of gas at the scene, but also pay attention to install them in a particular gas * may leak parts, such as the specific gravity of the gas to choose the sensor installed * effective height and so on.
B), portable gas detector:
Yi Yang portable instruments are easy to operate, compact size, can be carried to different parts of the production, electrochemical detector using alkaline battery power supply, can be used continuously for 1,000 hours; new LEL detector, PID and composite instruments using rechargeable batteries (some have been used without the memory of the sickle-hydrogen or carp-ion batteries), so that they can generally work continuously for nearly 12 hours, so as this type of instrument in the Therefore, as this type of instrument in various types of factories and the health sector is becoming more and more widely used.
If it is in the open occasions, such as open workshop use this kind of instrument as ** alarm, you can use the diffusion gas detector to wear, because it can be continuous, real-time, accurate display of the site of the concentration of toxic and harmful gases. Some of these newer instruments are also equipped with vibration alarm accessories to avoid inaudible audible alarms in noisy environments, and computer chips to record peaks, STELs (15-minute short-term exposure levels) and TWAs (8-hour statistically weighted averages) to provide specific guidance for worker health and **.
