What do the letters in the explosion-proof grade of the gas detector mean?
Ex explosion-proof public mark d Flameproof type (electrical equipment with flameproof enclosure) Class II: Electrical equipment for all other explosive gas atmospheres except coal mines and underground mines. C: Refers to the ignition energy uJ, 280, >180, 60...80, <60. T6: refers to the temperature group, T6 is 85 degrees.
What is the role of the pretreatment of the online gas detector?
On-line gas analyzers should be mostly used in sites with complex working conditions. The moisture, dust, and high temperature of the sample gas will have various effects on the detection of the instrument. Through the pretreatment system, the dry, clean and constant sample gas can be sent to the gas analysis instrument after sampling, heat preservation, oil removal, dust removal, condensation and water removal, pressurization or decompression, constant flow and constant pressure. Perform testing to ensure the accuracy and stability of the measured values.
What kinds of principles can the online oxygen detector be divided into?
Zirconia, electrochemical, paramagnetic, laser
Why do you have to fill in the background gas composition in the industrial and mining questionnaire in detail?
On-line gas detectors should be mostly used in sites with complex working conditions. Different gases may cause 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 safety of the instrument after it is put into use.
What role does the vortex condenser play in pretreatment?
Reduce the moisture content in the sample gas
Under what circumstances should a pressure reducing valve be used in the pretreatment of an online gas detector? Under what circumstances should a suction pump be used?
When the sample gas pressure in the pipeline is >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 steps of dust removal in the pretreatment of online gas detector?
Generally, there are three stages of filtration: sampling probe filter, filter in pretreatment, and fine filter in analysis instrument. The specific configuration depends on the actual conditions of the working conditions.
What value is the oxygen deficiency alarm point generally set for the oxygen gas detection alarm instrument?
18.5%VOL
If the pipeline of the analytical instrument is in a state of vibration, which detection principle cannot be used?
Laser principle and paramagnetic principle
