Gas Moisture Meter
Professional Gas Moisture Meter | Goldhome Hipot
Wuhan Goldhome Hipot Electrical Co., Ltd. was established in 2008, located in Economic and Technical Development Zone, working area more than 10000 square meters.We are professional OEM, ODM, OBM Manufacturer which is engaged in the research, development, sale and service of High Voltage Testing Equipment including: Resonant Test System, High Voltage Tester,Transformer Tester, Primary Current Injection Tester,Circuit Beaker Tester, Relay Protection Tester, Cable Tester, SF6 Test Analyzer,Oil Testing Instruments,etc.
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High Quality
Reliable Quality for Safe Power.
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Custom Service
Technical Consultation:≤1 H
Quotation:≤2 H
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Advanced Equipment
Precision Equipment, Superior Performance
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Professional Team
51 professional technicians, Advanced Solutions
A gas moisture meter is a specialized instrument designed to accurately measure the moisture content in gases. It typically displays the trace moisture content (μL/L) or dew point temperature (°C) directly. Widely used for testing the dryness of industrial gases such as SF₆, nitrogen, hydrogen, and compressed air, it helps prevent equipment from becoming damp, insulation degradation, corrosion, or malfunctions, thereby ensuring the safe and stable operation of systems in the power and chemical industries.
Main Features of SF6 Gas Trace Moisture Tester
High-Precision Measurement
Equipped with an imported high-performance dew point sensor, ensuring accurate measurements and excellent repeatability.
Fast Measurement Speed
Quick startup and stabilization, short testing time, and high efficiency for on-site use.
Large English Display Screen
Intuitive display of trace moisture content, dew point temperature, time, date, and other data.
Portable Design
Compact and lightweight with a built-in lithium battery, suitable for outdoor and on-site testing at substations.
Quick-Connect Fittings with Excellent Sealing
Specialized self-locking fittings ensure convenient connection, no gas leakage, and safe, reliable operation.
Data Storage and Retrieval
Can store a large volume of measurement data, facilitating the review and comparison of historical data.
Built-in Printing Function
Supports on-site printing of test results, making it convenient to generate reports.
Wide Operating Temperature Range
Adaptable to high and low temperature environments with strong stability.
Simple Operation
One-button measurement with no complex settings required; even beginners can get started quickly.
Wide Range of Applications
Suitable for various SF6 electrical equipment, including SF6 circuit breakers, GIS, current transformers, and gas-insulated switchgear.
SF6 Gas Trace Moisture Tester: Instructions for Use
Power On and Warm-Up
Turn on the instrument and allow it to warm up for 3–5 minutes to ensure the sensor reaches a stable state.
01
Connect the Equipment
Connect the instrument to the SF6 equipment’s gas chamber using the dedicated gas tubing, ensuring the connection is sealed and free of leaks.
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Parameter Settings
Set the measurement mode, date, time, etc. After confirmation, proceed to the measurement interface.
03
Start Measurement
Activate the instrument’s built-in air pump to begin automatic sampling, purging, and detection.
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Read Data
Once the readings have stabilized, record the trace moisture content (μL/L) and dew point temperature.
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Save / Print Data
You can save the current data or print the measurement results directly.
06
End Measurement
First, turn off the air pump, disconnect the air tube, and turn off the instrument’s power.
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Precautions
After measurement, vent any residual gas and keep the gas lines dry.
Avoid severe vibrations, water ingress, and high-temperature environments.
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Applications of SF6 Gas Trace Moisture Analyzers
1. Power Substations
Routine inspections, preventive testing, and acceptance testing for maintenance of equipment such as SF6 circuit breakers, GIS, current transformers, and bushings.
2. High-Voltage Switchgear Manufacturers
Trace moisture detection and quality control of SF6 gas prior to product shipment.
3. Power Research Institutes / Quality Inspection Centers
Gas performance testing, instrument calibration, and test analysis.
4. On-site Emergency Repairs and Fault Diagnosis
Rapidly determine whether equipment has absorbed moisture or experienced a decline in insulation, and assist in fault localization.
5. SF6 Gas Recovery, Purification, and Charging/Discharging Operations
Verify the trace moisture content of new gas, recovered gas, and regenerated gas to ensure compliance.
Working Principle
The F6 SF6 Gas Moisture Tester primarily utilizes the principle of a capacitive polymer sensor.
The instrument’s built-in pump delivers SF6 gas into the sensor, where water molecules in the gas are adsorbed by the polymer membrane, causing a change in the sensor’s capacitance or impedance.
Signal Processing: The sensor converts these capacitance changes into electrical signals, which are then analyzed and calculated by a microprocessor. The results are displayed on the screen as the dew point (°C) and the corresponding trace moisture content (ppm).
Advantages: Fast measurement speed (typically 3–5 minutes), low gas consumption, excellent repeatability, and strong resistance to contamination, making it ideal for frequent on-site testing requirements.
Famous Brands
International Premium Brands
Vaisala (Finland)
Core Advantages: The global benchmark for dew point measurement; leading sensor technology; accuracy within ±1°C; excellent long-term stability.
Representative Models: DMT340, DMT345, DMT347 (SF6-specific).
Applications: Electric Power Research Institutes, GIS equipment manufacturers, high-precision calibration.
MBW Calibration (Switzerland)
Core Advantages: Cold mirror principle, extremely high measurement accuracy (±0.1°C), equipped with a gas recovery system, environmentally friendly and safe.
Representative Models: 973-SF6 (simultaneously measures trace moisture, purity, and SO₂).
Applications: Laboratory calibration, factory testing of high-end equipment.
Xentaur (USA, now part of Process Insights)
Core Advantages: Fast response, contamination resistance, suitable for harsh industrial environments.
Representative Models: XDT Series, XPDM Series.
Applications: Rapid on-site testing at substations, SF6 gas recovery and treatment.
Domestic Specialized Manufacturers
Wuhan Goldhome Hipot
Core Advantages: Specializes in power testing equipment; offers a comprehensive range of SF6 trace moisture analyzers; supports custom development.
Representative Models: HM-3000 Series, HM-6000 Series.
Applications: Power systems, switchgear manufacturers, SF6 gas treatment stations.
Lanso (Shanghai)
Core Advantages: Integrated SF6 density and trace moisture monitoring, suitable for long-term online monitoring of GIS.
Representative Models: RDH40 Density and Trace Moisture Transmitter.
Applications: Substation online monitoring systems, smart grid projects.
Wuhan UHV
Core Advantages: Portable, RC-method sensors; affordable pricing; suitable for grassroots power units.
Representative Models: ACF6 Series, MEFJ-M2 Series.
Applications: Rapid on-site testing, routine inspections.
Alternative Name
SF6 dew point meter
SF6 moisture analyzer
SF6 gas moisture meter
SF6 micro moisture meter
Portable SF6 dew point meter
Portable SF6 moisture meter
Handheld SF6 dew point meter
SF6 gas moisture measuring device
SF6 water content tester
SF6 gas humidity analyzer
SF6 dew point tester
SF6 moisture tester
Dew point meter for SF6 gas
SF6 trace moisture analyzer
SF6 gas dew point moisture meter
SF6 multi-function analyzer
SF6 comprehensive tester
Chilled mirror SF6 hygrometer
SF6 dew point chilled mirror analyzer
SF6 mirror hygrometer
Polymer sensor SF6 moisture meter
SF6 mirror hygrometer
FAQ
1.What does an SF6 gas trace moisture tester measure?
A:It primarily measures the trace moisture content in SF6 gas, displaying the results in trace moisture value (μL/L) or dew point temperature (°C) to determine whether the gas is dry and meets specifications.
2.Does it need to be warmed up before measurement?
A:Yes. Generally, it should be turned on and allowed to warm up for 3–5 minutes to stabilize the sensor and ensure more accurate measurements.
3.How long does a single measurement take?
A:Values typically stabilize within 1–5 minutes, though this may take slightly longer in high-humidity environments.
4.Can the instrument be used directly at a substation site?
A:Yes. The instrument features a portable design with a built-in lithium battery and air pump, making it suitable for field use and substation sites.
5.What are the consequences of insufficient accuracy?
A:Low accuracy can lead to inaccurate data and misjudgments, potentially overlooking moisture-related hazards in equipment and compromising the safe operation of power equipment.
6.Can the instrument display both moisture content and dew point simultaneously?
A:Yes. It typically displays parameters such as moisture content, dew point temperature, and ambient temperature automatically and in sync.
7.Is it necessary to save or print the data after measurement?
A:The instrument supports data storage, on-site printing, and USB transfer to a computer, making it convenient to generate test reports.
8.Why do the measurement values keep fluctuating?
A:Possible causes:
- The instrument has not warmed up and stabilized
- Unstable gas flow
- The sensor is damp or contaminated
- Stabilizing the flow and performing a re-purge will resolve the issue.
9.Does the sensor require regular maintenance or replacement?
A:It has a long service life under normal use; avoid exposure to water, oil, or severe impacts. After prolonged use, calibrate or replace it according to the manufacturer’s recommendations.
10.Are SF6 moisture analyzers and dew point meters the same device?
A:They are the same device, just with different names: moisture analyzers focus on content, while dew point meters focus on temperature; the measurement principles are identical.
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