Darui Electric recommends for you
Working Principle
For instrument measurement, common methods include mirror method, gravimetric method, coulometric electrolysis method, capacitance method, etc. The first and second methods have high requirements for environmental conditions, long measurement time, and are afraid of pollution, so they are generally only used for arbitration analysis; the third method consumes a large amount of gas during measurement, is afraid of pollution, and takes a long time to measure. When using the equipment, it is necessary to power on and ventilate for drying one day in advance, and the repeatability is poor. The fourth method is currently the most widely used method, due to its advantages of short measurement time, low gas consumption, and resistance to pollution.
2. Measurement of H2 humidity by the instrument
Common measurement methods include ventilation dry and wet bulb method and coulometric electrolysis method. The first method is greatly affected by ambient temperature and humidity, and the measured value is偏高; the second method, in addition to the aforementioned disadvantages, is also afraid of pollution.
Based on the above reasons, we have absorbed the advanced technology and experience of some domestic and foreign humidity instrument manufacturers, and carried out innovation, developing a micro water measurement instrument with domestic leading level. It has the advantages of convenient use, short measurement time, high measurement accuracy, wide measurement range, and easy maintenance. Because the tester adopts advanced single-chip microcomputer technology, the instrument realizes automatic conversion between units such as dew point, PPmV, micro water at ambient temperature 20℃, absolute humidity, etc., without manual table lookup conversion. The circuit part of the instrument is advanced and reliable. In order to adapt to field operations, the instrument adopts AC/DC dual use, and the built-in battery can work continuously for more than 20 hours, broadening the scope of use and greatly facilitating users.
Factory direct supply comprehensive SF6 gas micro water tester features
1. Short measurement time and low gas consumption
2. Anti-pollution
3. Data storage and query function
4. Wide measurement range and high accuracy
5. Long-term stability and good repeatability
6. Micro water value automatically converted to standard micro water value at 20℃
Technical Indicators
(1) Measurement range: dew point value: -80℃ ~ +20℃
Micro water value: 1~23700uL/L (ppm)
(2) Measurement accuracy: ±1℃ (-60℃ ~ +20℃)
±2℃ (-80℃ ~ -60℃)
(3) Resolution: dew point value: 0.01℃
Micro water value: 1uL/L (ppm)
(4) Response time (+20℃, 0.1Mpa): 63% needs 5s, 90% needs 45s (-60℃ ~ +20℃)
63% needs 10s, 90% needs 240s (+20℃ ~ -60℃)
(5) Sampling flow: 2~3L/min ±20%
(6) Pressure range: 0~1.0 Mpa
(7) Operating temperature: -20℃ ~ +60℃
(8) Ambient humidity: 0～100％RH
(9) Storage temperature: -20℃ ~ +80℃
(10) Overall dimensions: 490×350×210mm
(11) Overall weight: 4kg
Product Parameters:
|
Micro water (Dew point) |
Measurement range |
-60 ℃ ~ +20 ℃ |
|
Measurement accuracy |
±2℃ |
|
|
Response time (+20℃) |
63% needs 45 seconds, 90% needs 90 seconds |
|
|
Resolution |
0.1℃/1ppm, |
|
|
Micro water (PPMv) |
Measurement range |
1~23700uL/L |
|
Measurement accuracy |
±5% |
|
|
Resolution |
0.1uL/L |
|
|
Gas flow |
2~3L/min |
|
|
Pressure |
0~1.0 Mpa |
|
|
Ambient temperature |
-20℃ ~ +60℃ |
|
|
Ambient humidity |
0~100% RH |
|
|
Power supply |
AC 220V / DC 12V |
|
|
Overall dimensions |
490×350×210mm |
|
|
Weight |
4kg |
