The application of standard gas in the verification of ammonia alarm is studied.Combined with practical work ex-perience,this paper discusses the influence of different diluent gases in standard gases,different gas pipelines and the air permeability of sensor protective cover on the verification results.A comparative test was carried out between the standard material of ammonia gas in nitrogen and the standard material of ammonia gas in air,the results show that different diluent gases have great influence on the indication value of the ammonia alarm which has been used for some time.Another com-parison test was carried out between PTFE pipe and silica gel pipe,the results show that the silica gel tube has strong ad-sorption for ammonia gas and is not suitable for the verification of ammonia gas alarm.
standard materialelectrochemistrysilica gel pipePTFE pipeadsorptioncorrosion
维普
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