Product Introduction
Working principle: chemiluminescence method
This instrument measures nitric oxide byNOgiveO3The light intensity of the luminescent reaction,So as to calculate the airNO、NO2reachNOX、NH3Concentration.NOandO3Reaction generates excited state nitrogen dioxide(NO2*)The excited state of nitrogen dioxide molecules releases excess energy back to a low-energy state by emitting photons, and the luminescence intensity is related toNOThe concentration is directly proportional,The light intensity signal is converted into an electrical signal by a photomultiplier tube,Determine by measuring electrical signalsNO、NOx、TNxThe concentration.The sample gas is divided into two paths, one of which enters the high temperatureNH3The conversion furnace undergoes the following reaction:,
4NH3+5O2→4NO+6H2O
Simultaneously inside the analyzerNO/NOxSwitch the valve to allow the sample gas to enter the molybdenum furnace alternately,NH3andNO2All have been transformed intoNOAt this time, the measured data isTNxAnd the other path directly enters the analyzer and undergoes a reaction through a molybdenum furnace,NO2Convert intoNOThe measured data isNOx,TNxgiveNOxThe difference between the two isNH3What is the concentration obtained without going through a molybdenum furnaceNOConcentration, ultimately measuredNOgiveO3Calculate the light intensity of gas-phase luminescence reaction to determine the concentrations of ammonia, nitric oxide, nitrogen dioxide, and total nitrogen oxides in the air.
Product Features
- Chinese menu, easy to operate;
- Equipped with a self starting function for incoming calls;
- Equipped with self diagnosis and alarm functions;
- Automatic compensation and correction of temperature and pressure;
- The sample gas alternately passes through the molybdenum furnaceNO2convert toNO, proceedNO2The measurement shows that the conversion efficiency of the molybdenum furnace is higher than96%;
- The sample gas alternately passes through the ammonia conversion furnaceNH3convert toNO, proceedNH3The measurement shows that the conversion efficiency is higher than95%;
- The ozone generator uses a drying tube to control the humidity of the sample gas, eliminating the trouble of replacing the desiccant;
- Can be manually or remotely automatically zeroed/Span calibration, display of instrument operation status and remote diagnosis;
- Can store and display monitoring data, calibration records, alarm records, and other information; Built in dynamic data storage function, capable of storing minute averages for over a year;
- Various communication methods, freely selectable, optionalRS232、RS485Serial port output, voltage output(0~5)VCurrent output(4-20)mA(Optional parts)