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http://www.folkd.com/detail//www.zetian-group.com/products/hm-200-hygronom

Overview
Hygronom is used to measure the humidity of flue gas emitted by pollution sources. According to measured humidity, it converts wet gas concentration into dry gas concentration. In addition, it also can be used in industrial online humidity monitoring.
HM-200 hygronom (humidity meter online) is an intelligent humidity/ oxygen transmitter, which employs microprocessor as the core, and frequency conversion icon oxygen sensor as a measuring unit. The installation method adopts a heat tracing pipeline installation. It is a self-developed product, of which, the core component is from Switzerland.

Under the effect of the air pump, the flue gas inside the stack enters the measurement module after heating from the heat tracing probe. The whole process of extraction, measurement, and discharge is with heat tracing to prevent gas from condensation, which will affect the measurement of moisture in the flue gas. The flue gas enters the measurement module after heating and the frequency conversion icon oxygen sensor will start to measure gas concentration. After the measurement, the gas can get into an analyzer for the measurement of other components.
Features Of HM-200 Hygronom
Portable structure, easy to install and disassemble
Able to measure the humidity of 300℃ flue gas
Able to match with the large-scale system for measurement or independent measurement
The probe is equipped with heat tracing function to prevent condensate water from damaging probe and affecting measuring value
Imported core components with high-performance index and reliability
Technical Parameter Of HM-200 Hygronom
Measurement rangeO2: 0～25.00%, H2O: 0～40.00% (volume ratio )
SensorFrequency conversion icon oxygen sensor (2)
Accuracy0～1%   O2:±1.5%F.S.
0～25%  O2:±1.5% of measured value
0～40.00%  H2O:±1%F.S.
Stability0～1%   O2:±1.5%F.S./7d
0～25%  O2:±1.5%/7d of measured value
0～40.00%  H2O:±1%F.S./7d
Response timeT90＜30s
Sensor life＞2 years (under normal use)
Transmitter life＞5 years (under normal use)
Power supply24VDC
Instrument weightNet weight about 2.25kg  (include operation panel)
Ambient temperatureTransmitter: -10°C～+50°C
Probe: 0～300℃  (except probe cable)
Ambient humidity＜85%RH
Power consumptionMaximum about 35VA (heating)
Under normal working: 30～31W
Sample gas flow（2～6）L/min
Analog output (2 sets)Settable 4-20mA, 0-20mA, 0-1-5-10V, 1-5V
CommunicationRs485 (standard)/RS232 (optional)
Application Of HM-200 Hygronom
It can be widely applied in high-temperature (300℃) gas (such as desulfuration and denitration) humidity measurement of Continuous Emission Monitoring System (CEMS), humidity measurement and control in fields including wood, building material, papermaking, chemical industry, fiber, pharmacy, textile, tobacco, vegetable and food processing.