Hs 918 CEM is an industrial system for direct total mercury determination in stack gas with dry converter. Designed for outdoor installation on the stack, no heated lines needed.
AREAS OF APPLICATION  

Designed for outdoor installation directly on a stack the Monitor continuously measures total mercury mass concentration in stack gases, including metallic, oxidized, and particulate bound mercury species.

OPERATING PRINCIPLE  

Oxidized mercury is completely reduced to its elemental form through the thermal conversion.
Mercury concentration is determined by Zeeman atomic absorption spectrometry using high frequency modulation of light polarization.
The Monitor presents the mercury concentration at standard conditions. Measurements are taken on hot wet basis.


配置：RA-915+M324（活性炭吸附管）+采样装置（烟气采样装置）

TECHNICAL SPECIFICATION

Measured component total mercury
Measuring principle thermal conversion, atomic absorption spectrometry, Zeeman background correction
Measuring range 0 - 75 µg/m3; 0 - 150 and 0 - 300 µg/m3 optional
Detection limit < 0,1 µg/m3
Cross-sensitivities ≤ 4% of measuring range
Response time (T90) < 30 seconds
Zero point automatic zero correction
Sample gas flowrate 1 l/min
Operating temperature from -20 to +50oC
Power requirements 110 V, 60 Hz, 1800 W
Dimensions & weight 980?55?50 mm, 72 kG
Protection class IP 55
Signal outputs analog: 4-20 mA
digital: RS-485, RS-232
status relays: Operating, Maintenance, Failure

BENEFITS

direct determination of total mercury without using any absorption traps
no wet chemistry, reagent-free analysis
no catalyst in the converter
real-time measurements, minimal measuring time is one second
high selectivity of the measurements, insensitive to interfering components
no need in heated lines
no need for compressed air
automatic drift and span correction
optional calibration by injecting a calibration gas mixture directly into the converter