How to choose a suitable gas detector and where to start from
When we purchase something, we always understand it before making a purchase, and the same goes for gas detectors. A gas detector is an instrument that detects the presence of gas in the workplace, and can detect gas composition, concentration, etc. But now there are many gas detector manufacturers on the market, and some businesses produce gas detectors that are explosion-proof and do not have intrinsic safety and explosion-proof functions. They cannot pass accuracy tests from national formal metrology institutions. If consumers purchase such products for use in high-risk areas, it will bring safety hazards. So how do we choose a suitable gas detector?
1. Self demand
What gas should be clearly detected when selecting a gas detector? In what environment is it used? Portable or fixed? And other accompanying functions. These reasons are usually necessary to consider. Otherwise, the original plan to buy an oxygen detector would result in buying an ozone detector, which would cause a big mistake and unnecessary economic losses.
2. Functional requirements
The general function of a gas detector is to detect gas concentration, give an alarm for exceeding the standard, and so on. But many customers don't just need these functions. Signal output is one aspect that requires current output, digital signal output, voltage output, and switch output. Perhaps there are other special requirements such as network interfaces and wireless signals. Meanwhile, data recording and processing are also common requirements.
3. Sensor origin
Many gas detector manufacturers use foreign sensors as their nominal sensors, but this is not always the case. Some use domestic sensors to fake imported sensors to deceive customers. When encountering such situations, it is necessary to carefully check the product information and sign a purchase and sales contract if necessary to ensure one's rights and interests.
4. Operating environmental conditions
All types of gas detectors have strict requirements for the on-site environment, generally speaking, temperature is -20~60 ℃, humidity is 0-95% RH, pressure is 80-120 Kpa, etc., including strict requirements for dust, flow rate, etc. Due to the significant impact of other impurities in the environment on the detection results, unforeseeable losses may occur. Simultaneously understanding the on-site working conditions and providing timely information to the manufacturer, the manufacturer will have corresponding plans to handle it.
5. On site safety situation
The installation and use of gas detectors are subject to mandatory requirements such as explosion prevention. The coal, petroleum, and chemical industries have very strict requirements for explosion prevention, requiring instruments to have their own explosion-proof certification. Other environments may require gas detectors to have environmental certification or metrology equipment licenses and other qualifications.
