Gas detectors are professional instruments for detecting the concentration of toxic and harmful gases, and they play an important role in production and life. However, many consumers do not know how to choose instruments? How to choose gas detectors according to different use environments? How to choose detectors when toxic and combustible gases exist at the same time?
For environments where toxic and combustible gases exist at the same time, gas detectors can be selected according to the following standards:
① If the monitored object is both combustible and toxic gas, only toxic gas detectors need to be set.
② If the concentration of combustible gas may exceed 25% of the lower explosion limit, and the concentration of toxic gas may also reach the upper limit of the allowable concentration, then both combustible gas detectors and toxic gas detectors need to be set.
③ If the concentration of combustible gas may exceed 25% of the lower explosion limit, and the concentration of toxic gas cannot reach the upper limit of the allowable concentration, then only combustible gas detectors need to be set.
④ If the concentration of combustible gas cannot exceed 25% of the lower explosion limit, and the concentration of toxic gas may reach the upper limit of the allowable concentration, then only toxic gas detectors need to be set.
How to choose gas detectors in toxic environments?
When choosing a gas detector, all possible situations should be considered. If there are toxic gases such as carbon monoxide and hydrogen sulfide, a specific toxic gas detector should be selected first to ensure the safety of personnel. If there are organic toxic gases (VOCs) that cause poisoning in low concentrations, such as aromatic hydrocarbons, halogenated hydrocarbons (amines), ethers, alcohols, fats, etc., photoionization gas detectors should be selected, and LEL detectors should never be used to deal with them, because this may cause personal injury.
How to choose a gas detector when entering a confined space?
Gas detection must be performed when entering a confined space, and the detection must be performed outside the confined space.
Oxygen concentration is one of the varieties that must be detected. It is necessary to select a portable gas detector with oxygen detection function to prevent hypoxia or oxygen enrichment, and a small size that does not affect the workers’ operations. In addition, after entering the confined space, the gas composition in the space must be continuously detected to prevent changes in the concentration of volatile organic compounds or other toxic and harmful gases caused by personnel entry, sudden leakage, temperature changes, etc. Therefore, four-in-one and five-in-one gas detectors are often used.
Should small-sized restaurants choose industrial or household alarms?
For small-sized restaurants, many shops choose to install household gas alarms. Is this feasible?
The answer is no, even for restaurants with very small areas.
① Different explosion-proof requirements
According to relevant national regulations, the shell of industrial alarms is generally cast aluminum explosion-proof; while the shell of household alarms is usually a plastic non-explosion-proof product. This is why even the smallest restaurants cannot use household alarms.
② Different functions
Household gas alarms can be linked to household solenoid valves and household fans; while industrial and commercial places need to be linked to large shut-off valves, exhaust fans and other equipment.
③ Different detection areas
The detection area of a single industrial and commercial combustible gas detector is generally around 20 square meters. Users can increase the number of detectors according to the area, while the detection area of a household combustible gas alarm is around 10 square meters.
④ Can multi-point deployment be carried out?
Industrial and commercial combustible gas alarms can also be arranged at multiple points according to detection needs, and centralized monitoring can be carried out through alarm controllers to achieve remote monitoring and management. The home version of the combustible gas alarm is just a simple single-point independent alarm reminder.
Gas detectors are professional instruments, so choosing one is also very important. When choosing, users can consult the alarm manufacturer or relevant technicians to find a perfect solution!
