Some common knowledge of gas detectors
9. What do the letters in the explosion-proof level Exd II CT6 represent?
Ex explosion-proof public mark d Flameproof type (electrical equipment with flameproof enclosure) Class II: all electrical equipment used in explosive gas environment except coal mine and underground. C: It refers to the ignition energy uJ, 280,>180,60... 80,<60. T6: refers to the temperature group, T6 is 85 degrees.
What role does the preprocessing of online gas detectors play?
Online gas analyzers should be widely used in complex working conditions, as the moisture, dust, high temperature, etc. of the sample gas can have various impacts on the detection of the instrument. Through the pre-treatment system, the sample gas can be sampled, insulated, degreased, dusted, condensed and dehydrated, pressurized or depressurized, constant flow, and pressure, and then sent to the gas analysis instrument for testing, ensuring the accuracy and stability of the measured values.
11. What are the principles of online oxygen detectors for detection?
Zirconia, Electrochemistry, Paramagnetism, Laser
12. Why is it necessary to fill out the background gas composition in detail in the industrial and mining survey form?
Online gas detectors should be widely used in sites with complex operating conditions, as different gases may have cross interference or even corrosion. By filling in the background gas in detail, factors such as instrument selection, interference, and corrosion can be fully considered in the analyzer design stage to ensure the stability and corrosiveness of the instrument after it is put into use.
13. What role does the vortex condenser play in pre-treatment?
Reduce the moisture content in the sample gas
Under what circumstances do pressure reducing valves need to be used in the pre-treatment of online gas detectors? Under what circumstances does a suction pump need to be used?
When the sample gas pressure in the pipeline is greater than 0.2MPa, a pressure reducing valve should be used. When the pressure is less than 50KPa, a suction pump should be used.
What are the types of dust removal steps in the pre-treatment of online gas detectors?
Generally, there are three levels of filtration: sampling probe filtration, pre-treatment filter, and analytical instrument fine filtration. The specific configuration depends on the actual working conditions.
16. What is the general setting of the oxygen deficiency alarm point for the oxygen gas detection alarm device?
18.5% VOL
If the analytical instrument pipeline is in a vibration state, which detection principle cannot be used?
Laser principle and paramagnetic principle
