The core accessory of the body detector is the gas sensor, which is equivalent to the importance of the CPU in the computer. It can be seen from this that the performance of the gas sensor basically determines the performance, but its performance is not determined by the sensor alone. The role of the gas sensor is to detect the gas composition and concentration, and to convert a certain gas volume fraction into a converter corresponding to an electrical signal and output a weak electrical signal at the same time. According to the detection principle, gas sensors can be divided into: semiconductor principle gas sensor, electrochemical principle gas sensor, catalytic combustion principle gas sensor, thermal conductivity principle gas sensor, infrared principle gas sensor, PID principle gas sensor, etc.
1. Stability
Stability is the primary issue we must consider. What is the value of zero offset and full offset, the smaller the better.
2. Convenience
Now we are all working outside. On the premise of stability, convenience is also an important factor, light weight, small size, easy and comfortable wearing, and easy maintenance.
3. Applicability
Technicians identify and evaluate the hazardous gases in the limited space operation site to determine whether the sensor of the selected detector meets the requirements for use.
4. Reliability
The longer the sensor life, the better. Generally speaking, the sensor life is 2 years, and the combustible gas sensor is 2~5 years. The longer the average error time, the better, what is the accuracy and precision, and the smaller the error value, the better.
5. Protection requirements
Whether the explosion-proof safety level is suitable for the workplace, whether the product safety is certified, and whether there is an explosion-proof certification or measurement certificate.
6. Ease of identification
Whether the display area is large enough, whether the font is clear, whether the alarm sound is large enough, and whether the alarm flashing light can be recognized from various angles.
