Sf6 Gas Dew Point Hygrometer Intelligent Moisture Micro Water Meter

I.Description
SF6 comprehensive tester combines the tests of humidity of SF6, purity of SF6 and it integrates the functions which were originally fulfilled by tow instruments into one instrument. One site measurement can fulfill the test of three targets. It greatly saves the gas in the equipment, reduces the work amount of the users and improve the work efficiency.
SF6 comprehensive tester enjoys the excellent capabilities because it fully adopts the best foreign sensor, Finnish Vaisala for humidity, the thermal conductivity sensor with temperature compensation for purity are the imported products. It adopts the LCD display with real-time display of all parameters. It enjoys the overall fool-operation and large storage of information. It has chargable batteries inside for either alternating or direct current.


II.Two Measurement Principle
The basic principle of ATSM902 Type SF6 tester for measuring purity is to define the contents according to the heat conducting rate of all gases. The heat conducting rate of SF6 is the lowest in the gas, so when the heat conducting rate of the background gas is basically kept stable, the heat conducting rate will be lower if the content of SF6 in the hybrid gas is higher. The density of SF6 can be tested according to it.
 

Component	Heat conducting rate	Component	Heat conducting rate
Air O2 NH3 CH4 He H2	1.000 1.028 1.040 1.450 5.530 6.803	SF6 SO2 H2S Ar CO2 H2O CO N2	0.342 0.350 0.540 0.665 0.704 0.771 0.958 0.989

  Relative heat conducting rates of normal gases (With the air at 120ºC as the reference)
The sensor components of the ATSM902 gas analyzer are equipped in a firm thermostatic chamber, and it guarantees that the sensor can steadily work in the adverse environment.
The hydrogen sensor component is a stainless steel structure with two same sensing components inside, sensing component for measurement and sensing component for reference. There is the thermal resistor with high reliability equipped in each sensor component. These corresponding thermal resistors form the measurement arm of the bridge type circuit, and the unbalanced current of the bridge type circuit can be adopted to measure the relative capability of the sampled gas conducting heat from the thermal resistor to the surface of the sensor component. One end of the sensor with the equipped thermal resistor is sealed and the sampled gas will extend to get in in order to reduce the influence of the flow change of the sampled gas to the minimum.

III.Technical targets
Humidity of SF6:
Measurement range:Dew point: -80~+20ºC(support ppmv and so on)
Precision of dew point:±0.5ºC
Resolution ratio:dew point 0.1ºC or 0.1ppm
Repeatability:±0.5ºC
Flow of gas:when measuring humidity:0.8~0.9L/min,when measuring purity:0.5~0.7L/min
The electric quality flow meter, the flow speed of the sample gas will not be influenced.
Pressure measurement:0~1.0MPa
Probe protection:stainless steel sintered filter
Purity of SF6:
Range: 0~100% SF6;
Precision and repeatability: ±0.5%,have nothing to do with the flow;
SF6 decomposition products 
Gas measurement range: H2S:1 ~ 200ppm
SO2:1 ~ 200ppm
CO:1 ~ 1000ppm
Sensitivity: 0.1 ppm
 
Work voltage: 220VAC±10%  50Hz,both alternating current and direct current, protection from over-charging, the continuous work time should not be less than 5 hours.
Storage temperature level: -40~+70ºC
Output interface: USB1.1 specification
Operation environment: temperature: -30~+60ºC
Pressure: 0~20bar
Flow speed of sample gas: without influence
Other allocation:management software of standard version, including the report printing and common shift tool bag of humidity
Size:132×283×308
Weight :about 4.3kg




IV.Company Information

HuaZheng Electric Manufacturing (Baoding) Co.,Ltd is the supplier of the State Grid in China.It means we are the supplier of the Chinese Government.And our products spread throughout the whole China.

What's more, our customers come from different countries like America, England, Bulgaria, Brazil, Chile, Malysia, Vietnam and so on.

Our main products are Insulation Oil Tester, Cable Fault Locator, Power Quality Analyzer, High Voltage Generator, High Voltage Capacitor, Testing Transformer and so on.



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