Precautions for using the hottest combustible gas

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Precautions for the use of combustible gas detector

toxic and harmful gas detector, like other analysis and detection instruments, is measured by relative comparison method: first calibrate the instrument with a zero gas and a standard concentration of gas, and get the standard curve and store it 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, Accurate gas concentration value can be obtained through calculation. Therefore, it is necessary to zero the instrument at any time and calibrate the instrument regularly to ensure the accuracy of instrument measurement

it should be noted that at present, many gas detectors can replace the detection sensor, but this does not mean that a detector can be equipped with different detector probes at any time. Whenever the probe is replaced, the instrument must be recalibrated in addition to a certain sensor activation time. In addition, it is suggested to test the response of the standard gas used in various instruments before they are used, so as to ensure that the instruments really play a protective role

2. Pay attention to the detection interference between various sensors

generally speaking, each sensor corresponds to a specific detection gas, but any gas detector cannot be absolutely effective. Therefore, when selecting a gas sensor, we should try our best to understand the detection interference of other gases to the sensor, so as to ensure its accurate detection of specific gases

4. Dry the particles. 3. Pay attention to the service life of all kinds of sensors.

all kinds of gas sensors have a certain service life, that is, service life. Generally speaking, in portable instruments, LEL sensors have a long service life, which can be used for about three years; The service life of the photoionization detector is four years or 1. Some enterprises are also engaged in 3D printing, and silica gel is longer; The service life of electrochemical specific gas sensors is relatively short, generally one to two years; The service life of oxygen sensor is the shortest, about one year. The service life of the electrochemical sensor depends on the drying up of the electrolyte. Therefore, if the manufacturer does not use it for a long time, it can prolong the service life by conducting a tensile test on the hair and sealing it in a low temperature environment. Due to the relatively large volume of the fixed instrument, the service life of the sensor is also longer. Therefore, the sensor should be tested at any time and used within the validity period of the sensor as far as possible. Once it fails, it should be replaced in time

4. Pay attention to the concentration measurement range of the detection instrument

all kinds of toxic and harmful gas detectors have their fixed detection range. Only when the measurement is completed within its measurement range can the instrument ensure accurate measurement. If the sensor is measured beyond the measurement range for a long time, it may cause permanent damage to the sensor

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