The APM-402 is a criteria pollution monitor based on the ultraviolet fluorescence, which is the standard method for the measurement of SO2 concentrations in ambient air ( EN 14212 ).
应用
The APM-402 is a criteria pollution monitor based on the ultraviolet fluorescence, which is the standard method for the measurement of SO2 concentrations in ambient air ( EN 14212 ).
-The periodic switch and the optical flux detector automatically compensate the light source to improve the stability of the system.
-The analyzer provides a variety of online operating parameters and functions for remote quality control
|
operational principle |
UV fluorescence |
|
Measurement Range |
0-500ppb-20000ppbAutomatic range switching |
|
Measurement unit |
ppb、ppm or μg/m²、mg/m² |
|
Lowest detection limit |
0.5ppb |
|
Noise |
<0.25ppb |
|
Zero drift |
±1ppb/24h |
|
Span drift |
±1%/24h F.S |
|
Precision |
±1%/24h F.S |
|
Response time |
<120s |
|
Sample flow-rate |
700sccm±10% |
|
Output interface |
Analog signals:0-0.5V/2V/5V/10V(4-20)mA Digit signals:RS232 or RS485 |
|
Power supply |
AC220V±10%,50Hz |
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