Introduction to Relevant Characteristics of Toxic Gas Detectors
Unlike combustible gas detectors, toxic gas detectors are not universal. Toxic gas detectors are a type of gas detector with strong specificity, and are selected based on the specific toxic gas being measured.
For example, carbon monoxide detectors and chlorine gas detectors, although both are called toxic gas detectors, are different because they measure different specific gases;
So, these two are completely different toxic gas detectors. If a carbon monoxide detector is used to detect chlorine gas in an environment where it is stored, the carbon monoxide detector will not react.
That is to say, it is not possible to detect chlorine gas with a carbon monoxide detector. Therefore, before selecting a toxic gas detector, it is necessary to clarify which specific toxic gas is being measured.
The toxic gas detector can be selected as either pump suction or diffusion type based on its toxicity level.
If the toxicity of toxic gases is high and there is danger for personnel entering, a pump suction toxic gas detector must be selected, such as:
Places where phosphine exists; If the toxicity of toxic gases is not very high and may exist in trace amounts, but long-term inhalation can also cause danger;
In this situation, a diffusion type toxic gas detector can be selected, such as in places where carbon monoxide is present.
Generally, there are several points to note when it comes to toxic gas detectors:
1. Pay attention to regular calibration and testing:
Toxic and harmful gas detectors, like other analytical and detection instruments, are measured using a relative comparison method
First, calibrate the instrument with a zero gas and a standard concentration gas, and store the standard curve in the instrument;
When measuring, the instrument compares the electrical signal generated by the concentration of the gas to be measured with the electrical signal of the standard concentration, and calculates the accurate gas concentration value.
Therefore, zeroing the instrument at any time and regularly calibrating the instrument are essential tasks to ensure accurate measurement.
It should be noted that many gas detectors currently have replaceable detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time.
Whenever replacing the probe, in addition to requiring a certain sensor activation time, the instrument must also be recalibrated.
In addition, it is recommended to perform response testing on the standard gas used in various instruments before use to ensure that the instruments truly provide protection.
