Product Introduction

Working principle: chemiluminescence method

This instrument measures nitric oxide byNOgiveO₃The light intensity of the luminescent reaction,So as to calculate the airNO、NO₂reachNO_X、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)