The working principle of a gas detector can be divided into several steps
With the rapid development of society, human attention to safety production continues to increase. Gas detectors also have increasingly broad development space and directions. It is precisely because of the development of gas detectors in various aspects that experimental work and safety assurance have been greatly improved. Next, we will introduce how gas detectors detect gases.
The working principle of a gas detector can be divided into four steps:
1. The gas detector adopts advanced hardware both domestically and internationally. These hardware can inhale gas, analyze and detect the inhaled gas. If certain detected substances in the gas exceed or do not meet the standard, the alarm will be triggered to sound.
2. Gas detectors work in a completely different way. Due to the gas entering the testing chamber, a beam is directed at it. It actually reaches the gas; Half of the gas enters a receiver, while the other returns to the transmitter. The detector measures the intensity of two beams to determine the presence of combustible gases. When the beam is the same, everything is fine, but changes in the intensity of the gas side beam may indicate a problem.
3. When using gas detectors for toxic gas detection, we must first pay attention to inherent issues such as chemical stability of toxic gases and regulatory levels at relatively high concentrations. Because they rely on air flow rather than active pulling, and the response time of samples is generally slower. The calibration of a four in one gas detector is often difficult and requires special accessories to be converted. It operates in a diffusion mode through flow calibration purposes. In addition, the diffusion equivalence implied by monitoring and calibration through the flow between them is not always well recorded.
4. Calibration can be further complicated if adjustments must be made on the control panel, while the gas is applied to the remote diffusion gas detector sensor head. In some applications, there may be interfering gases present. The sample drawing method allows the chemical scrubber to be placed upstream of the sensor to absorb interfering substances. All gas sensors measure partial pressure and actively request that the sensor sample is working at a slightly elevated pressure while the ambient pressure sensor is diffusing. Therefore, the output sensitivity of sample drawing sensors is usually higher than that of diffusion sensors. This may be due to the low regulatory level of many toxic gases. But how many toxic gases will have the necessary characteristics.
