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Advanced SF6 Dew Point Measurement with the Portable WL-V Hygrometer

Time:2025-12-31 Number:1

For technical professionals working with SF6 insulation in high-voltage equipment, accurate and reliable moisture measurement is critical. Excessive moisture can compromise dielectric strength, promote corrosive by-products, and ultimately risk equipment failure. The WL-V Intelligent High Precision Portable SF6 Dew Point Hygrometer is engineered to deliver fast, accurate, and user-friendly moisture analysis in field and lab environments.

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Core Technical Features & Capabilities

The WL-V integrates several key features designed for efficiency and precision in demanding conditions:

1.Rapid, High-Accuracy Measurement: The instrument achieves a ready state within 2 minutes of power-on. It delivers dew point measurements across a wide range of -80 °C to +20 °C, with an accuracy of ±0.5 °C within the -60 °C to +20 °C range and ±1.0 °C from -80 °C to -60 °C.

2.Enhanced Data Integrity & Usability: A built-in self-calibration function ensures long-term measurement accuracy without frequent return-to-lab cycles. Self-locking joints prevent SF6 gas leaks during connection, ensuring sample integrity and safety.

3.Comprehensive Data Management: The device can store up to 250 complete test results. Data can be reviewed via a clear 4.3-inch color LCD touchscreen, which simultaneously displays dew point, PPMv, temperature, humidity, date, and time. The curve display function allows for visual tracking of measurement stabilization and trends.

4.Integrated Reporting & Connectivity: An onboard micro ink printer generates immediate hardcopy reports. For data transfer and potential system integration, a standard RS232 interface is provided.

5.Field-Readiness: Powered by a built-in 4Ah rechargeable Li-ion battery, the WL-V supports over 10 hours of continuous operation on a single 4-hour charge. Its rugged design supports operation in temperatures from -40 °C to +60 °C.

Detailed Technical Specifications

Parameter

Specification

Dew Point

Range: -80 °C to +20 °C (0.04 - 23,700 ppmv)
Accuracy: ±0.5 °C (-60 °C to +20 °C); ±1.0 °C (-80 °C to -60 °C)
Response Time (Td +20°C): 63% in 5 sec, 90% in 45 sec (-60 °C to +20 °C)
Response Time (Td -60°C): 63% in 10 sec, 90% in 240 sec (+20 °C to -60 °C)

Ambient Conditions

Temperature: -40 °C to +60 °C
Humidity: 0 to 100% RH

Display

4.3-inch Color LCD Touch Screen

Data Logging

250 groups of test results

Output

Micro Ink Printer, RS232 Interface

Power Supply

AC 220V; Built-in Rechargeable Li-battery (4Ah)

Battery Performance

~4 hours charge for >10 hours operation

Physical

Dimensions: 250 x 150 x 300 mm
Weight: 5 kg

Temperature Rating

Operating: -40 °C to +60 °C
Storage: -40 °C to +80 °C

Application Summary

The WL-V Portable SF6 Dew Point Hygrometer is a comprehensive solution for maintenance engineers and technical specialists. Its combination of speed, high precision, robust data handling, and portability makes it ideal for routine quality checks, commissioning of new equipment, diagnostics, and long-term monitoring of SF6 gas condition in circuit breakers, GIS, transformers, and other gas-insulated systems. The integrated design minimizes the need for additional equipment, streamlining the workflow for reliable moisture assessment.

 GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/