Gas detector how to choose?
According to different environments and testing requirements, selecting the right and correct gas detector is a must for everyone involved in safety and hygiene.
The type of gas detector is different depending on the industrial environment.
1. Fixed gas detector:
This is a detector that is used more often in industrial installations and production processes. It can be installed at specific detection points to detect specific gas leaks. The fixed detector is generally a two-body type. A sensor and a detection head composed of a transmission are integrally installed at the inspection site. Secondary instruments including a circuit, a power supply, and an alarm display device are integrally installed in a safe place to facilitate monitoring. Its detection principle is the same as that described in the previous section. It is only suitable for the continuous and long-term stability required by the fixed test in terms of technology and technology. They also need to be selected according to the type and concentration of gas in the site, and they should also be careful to install them on the site where the specific gas is most likely to leak, for example, to select the most effective height of the sensor installation according to the specific gravity of the gas.
2, portable gas detector:
Because the portable instrument is easy to operate and small in size, it can be carried to different production sites. The IAQ probe can measure temperature, humidity, CO, and CO2, calculate outdoor air percentage, dew point, and wet bulb temperature. There are CO sensors in the 982 probe. On-screen prompts and step-by-step indexing guide users through operation, setup, and on-site calibration. Plug-in multifunction probe.
Gas detection should also be considered from the perspective of the confinement and openness of the environment:
1. Confined space:
For example, reaction tanks, storage tanks or containers, sewers or other underground pipelines, underground facilities, closed agricultural granaries, railroad tankers, ship cargo holds, tunnels, etc., must be inspected before entering, and must be in confined spaces. Outside the test. In this case, a multigas detector with a built-in sampling pump must be selected. Because the gas distribution and gas types in different parts of the confined space (upper, middle, and lower) are quite different. Therefore, a complete closed-space gas detector should be equipped with a built-in pumping function so that it can detect non-contact, sub-area detection with multiple gas detection functions to detect different spatial distribution of hazardous gases, including inorganic gases and organic gases. Prevents oxygen-deficient or helium-rich instruments that do not affect workers' work. Only in this way can the absolute safety of workers entering the confined space be guaranteed.
2. Open occasions:
For example, an open work shop uses this kind of instrument as a safety alarm, and it can use a diffuse gas detector that is worn on the fly, because it can display the concentration of toxic gas in the site continuously, in real time, and accurately. Some of these new instruments are also equipped with vibration alarm attachments to avoid audible alarms in noisy environments, and computer chips are installed to record peaks, STELs (short-term exposure levels for 15 minutes) and TWA (average of 8-hour statistical weights). ) Provide specific guidance for worker health and safety.
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