Sailhero XHN2000B Nitrogen Dioxide Analyzer adopts the chemiluminescence method. Primarily applied to the construction of various ambient air quality automatic monitoring stations at all levels, it enables continuous and automatic monitoring of the concentrations of nitric oxide (NO) and nitrogen dioxide (NO₂) in ambient air.
Sailhero XHN2000B calculates the concentration of NO, NO2 and NOX in the air by measuring the light intensity of luminous reaction between NO and O3 . NO and O3 react to generate excited-state nitrogen dioxide (NO2*), and the excited-state nitrogen dioxide molecules release excess energy to return to low energy state by emitting photons. The light
intensity is proportional to the concentration of NO. The photomultiplier converts the light intensity signal into electrical signals, and the concentrations of NO and NOx are determined by measuring the electrical signals. The NO/NOx valve is used to switch the sample gas
entering the reaction chamber, so that the sample gas directly entering from the sampling port and the sample gas passing through the molybdenum furnace alternately enter the reaction chamber. When the sample gas directly enters the reaction chamber, the concentration of NO in the air is measured; when the sample gas enters the reaction chamber through the molybdenum furnace, NO2 in the sample gas is reduced to NO, and the concentration of total nitrogen oxides NOx in the air is measured under such condition. NOx concentration subtracting NO concentration gets NO2 concentration.
Main Characteristics
1. Manual or remote automatic zero/span calibration;
2. Automatic self-starting;
3. Auto-diagnosis and alarm function;
4. Temperature and pressure automatic compensation and correction;
5. The ozone generator controls the humidity of the gas circuit through the drying tube, which avoids the tedious replacement of desiccant;
6. Sample gas is alternately passed through the molybdenum furnace, which converts NO2 to NO for determination with a conversion efficiency of more than 96%;
7. Built-in dynamic data storage can store minute average value for more than one year;
8. It can store and display monitored data, calibration records, alarm records, etc.;
9. Various communication methods for selection, including RS232 or RS485 interface output, voltage output (0~5)V (optional) and current output (4-20)mA (optional).
10. China Environmental Industry Association certified.
Parameters and Indexes
| Measurement range |
(0~500) ppb |
| Unit of concentration |
mg/m3, μg/m3, nmol/mol, μmol/mol, ppm, ppb |
| Minimum measurement unit |
0.1 ppb |
| Limit of detection |
≤0.5 nmol/mol |
| Zero point noise |
≤0.25 nmol/mol |
| Indication error |
±1% F.S |
| Precision |
≤5 nmol/mol |
| Zero drift |
±1 ppb/24h |
| Response time |
≤120s |
| Molybdenum furnace conversion efficiency |
>96% |
| Sampling flow |
0.5L/min |
| Overall dimension: (L × W × H) |
56.5cm×48.2cm×13.4cm (without handle and fixing plate) |
| Weight |
20 Kg |
