Toxic gas detection range
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Regarding the determination of the detection range for toxic gases, should it be carried out strictly in accordance with the standards, or should the range be selected based on the sample?； Because I’ve found that in many cases, the range of calculations and the samples are different?
For toxic gas detection, the range on the sample must be greater than or equal to the range specified in the standards.
So, what should be done based on this experience?
Generally, the toxicity range is in ppm, with a lower alarm limit of 25.
Reply 1# clock.zsf: Generally, a warning is issued at 2.5 ppm, while an alarm is triggered at 5 ppm.
5.3.1 The measurement range for 4 toxic gases should be 0–300% of the maximum allowable concentration, or 0–300% of the short-term exposure limit. When the measurement range of the existing detectors cannot meet these requirements, the measurement range for toxic gases can be 0–30% of the concentration that causes immediate harm. Different toxic gases have different requirements; some are based on empirical data, while others cannot be measured by sensors… Settings should be determined in accordance with relevant standards and taking into account actual conditions.
Is it necessary to cover the entire chemical plant when installing flammable and toxic gas detectors?
Try to place the potential leakage points as far apart as possible; think things through thoroughly. According to the regulations, gas detectors need to be installed every 2 meters, so wouldn’t that result in them being placed all over the place? Not to mention the cost, walking around would become a problem.