Requirements That Portable Gas Detector Users Must Know
The application environment of portable gas detectors is usually harsh, and they are specially designed to be waterproof and dustproof. The usual protection level ranges from IP65 to IP67, which is the world's common industrial protection level representation method. The last two digits represent the dustproof and waterproof levels. IP65 indicates that the instrument is dust-proof and provides protection against water spray; IP67 indicates that the instrument is dust-proof and protected from water immersion.
The protection level of portable gas detectors depends on the sampling principle. Diffuse sampling has a higher protection level of IP67, while pump suction products can only achieve IP65 due to their inability to completely waterproof gas suction sampling. The anti drop design of portable gas detectors is also important, usually ranging from 3 meters, 6 meters, and 8 meters. If the instrument can still be used normally after falling from a height of 3 meters to a cement ground, it can withstand general environmental impacts, of course, 8 meters is the best.
As users of portable gas detectors, in order to ensure the stability of their use, users should pay attention to the following requirements:
1. Portable gas detectors have a lifespan limit, and portable gas detectors are no exception. Even if they are not used frequently, they can still experience aging. In general, among portable gas detectors, photoionization detectors have the longest lifespan of about four years; The service life of LEL sensors is second, and they can be used for more than three years; The lifespan of electrochemical specific gas sensors is relatively short, generally ranging from one to two years; The oxygen sensor can only be used for about a year.
2. Portable gas detectors can only complete measurements within this range, otherwise the measured results will be much lower than the values in your environment. In addition, prolonged measurement beyond the range can cause damage to the sensor, resulting in inaccurate results even within the measurement range later on.
3. Portable gas detectors generally use a relative comparison method for measurement. The measurement method is as follows: first, calibrate the instrument with a standard concentration of gas and a zero gas, and store the standard curve in the instrument; Compare the electrical signal of the standard concentration with the electrical signal generated by the measured gas concentration, and calculate the accurate gas concentration value.
