Which technologies are used for toxic gas detectors?

Recently, life essential equipment - gas detector, now economic development, environmental hazards are not only expanding, which want a better life, then we need to protect our personal by gas detector Safety. however. What high-end technologies are used for toxic and harmful gas detectors ?

First of all , we must know that toxic gas detectors are instrumentation tools for detecting the concentration of toxic gas leaks. They mainly refer to portable/handheld gas detectors. Mainly using toxic gas sensors to detect the presence of gas species in the environment. Toxic gas detectors are not as versatile as combustible gas detectors. Toxic gas detectors are highly targeted gas detectors that are selected based on the specific toxic gases measured. For example: carbon monoxide detector and CL2 gas detector, although they are all called toxic gas detectors, but because the specific gases measured are not the same, so the two are completely different toxic gas detectors, if you take the carbon monoxide detector to HCL gas detects CL2 gas in the presence of carbon monoxide detector is no response.

In other words, the carbon monoxide detector cannot detect the CL2 gas. Therefore, before the poison gas detector is selected, it must be specified which kind of toxic gas is to be measured. Toxic gas detectors choose pumping or diffusion based on their toxicity. If the toxic gas is very toxic, it is dangerous for people to go in. In this case, a toxic gas detector must be pumped. If the toxic gas is not very toxic and contains trace amounts, long-term inhalation can also cause danger. In this case, a diffuse toxic gas detector may be selected, for example, where carbon monoxide is present.

Generally, for the toxic gas detector, we must grasp several points:

1, pay attention to regular calibration and testing:

Toxic and harmful gas detectors are also used in the same way as other analytical testing instruments. They are measured using a relatively simple method: First, a zero gas and a standard concentration of gas are used to calibrate the instrument. The calibration curve is stored in the instrument. During the measurement, the instrument compares the electrical signal generated by the gas concentration to be measured with the electrical signal of the standard concentration and calculates the accurate gas concentration value. Therefore, zero calibration of the instrument at any time and regular calibration of the instrument are essential to ensure accurate measurement of the instrument. It should be noted that at present, many gas detectors can replace the detection sensors. However, this does not mean that one detector can be equipped with different detector probes at any time. Whenever a probe is replaced, the instrument must be recalibrated in addition to a certain sensor activation time. In addition, it is recommended to respond to the standard gas of the instrument before using it to ensure that the instrument really protects the instrument.

2, to be noted that the detection equipment measuring the concentration range: all kinds of toxic and hazardous gas detector has a fixed detection range. Only by completing the measurement within its measurement range can it be guaranteed. The instrument is accurately measured. Measuring over a long period of time may cause permanent damage to the sensor. For example, the LEL detector may completely burn out the sensor if it is accidentally used in an environment exceeding 100% LEL. Toxic gas detectors can also cause damage if used for a long time at higher concentrations. Therefore, if a stationary instrument emits an over-limit signal during use, the measurement circuit must be immediately turned off to ensure the safety of the sensor.

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