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    GDWG-III SF6 Gas Quantitative Leakage Detector hits:
    General introduction

    GDWG-III SF6 gas leakage detector, with non-dispersed infrared (NDIR) technology, is mainly used to pinpoint and measure SF6 leakage on GIS and refilling equipment within power industry.

    The annual leakage rate of SF6 gas electrical equipment is measured with bandaging method. At the same time, the equipment is widely used in power supply bureau, substations, high voltage switch company, laboratory hood and scientific test. 


    • High voltage switch-gear
    • Helicopter rotor blades
    • Gas transmission system
    • Fire extinguisher
    • Ventilation rate study
    • Hazardous material
    • Tank


    • No radioactive risk.
    • No need to replace high purity argon gas regularly.
    • No need to replace sensor regularly, cost-effective.
    • No need to make linear calibration every year, no wearing parts.
    • Not effected by humidity, environment pollution or data drift.
    • Leakage detection is up to 0.1 ppmv.
    • When there is severe leakage or SF6 gas concentration is up to 100%, it will not be polluted or damaged.

    • Small size, light weight, easy to transport and carry.
    • To measure SF6 gas leakage qualitatively and quantitatively.
    • To locate SF6 gas leakage point.
    • Parameters like SF6 gas concentration, temperature, humidity, power indicator, date and diaphragm pump status are displayed.
    • User-friendly interface.
    • Use NDIR technology and advanced sensor from Germany.
    • Fast test speed and good repeat-ability, data is stabilized within 3s.
    • With temperature and pressure compensation.
    • No false alarm, no gas except SF6 responses.
    • Non-contact gas measurement ensures that sensor won’t be poisoned at any concentration rate.
    • Thermostatic chamber ensures no temperature drift at ambient temperature for sensor.
    • 3.5 inch OLED display, legible in the strong sunlight.
    • Built-in lithium battery, standby time is long.
    • Alarm signal with sound and light enables operators to find leakage point without viewing data.
    • Pipelines is customized as per request.
    • Pump suction sampling ensure good sealing of gas path under test.
    • Equipped with anti-slip belt, hand-held probe, ensure the safety of human life.  
    • More than 8000 groups of test data is stored based on gas concentration and test time, easy to query.
    • The shell is made of high-strength, full-shielding aluminum, light in weight.
    • High-strength engineering plastic is used on external packing, skid-resistant, waterproof, dust-proof, explosion-proof.
    • Support bilingual switch (Chinese - English). (Optional)
    • Quickly display SF6 gas unit PPmv, mg/m3. (Optional)
    • Support SF6 gas concentration monitoring in enclosed places and real-time display concentration curve. (Optional)
    • Support data storage, view, removal and alarm record in a single machine; Can download data in TXT format via USB interface; If equipped with upper computer software, data can be exported, stored, analyzed and printed. (Optional)


    Measurement principle

    NDIR, dual wave-length method


    0.1PPmv (with wide range) (Standard)

    0.01 PPmv (with high precision) (Optional)

    Measurement range

    0 ~ 1000PPmv (with wide range) (Standard)

    0 ~ 50PPmv (with high precision) (Optional)


    ±2%F.S. (0 ~ 1000ppm)

    Repeat-ability error

    ≤ ±1%

    Response time

    ≤ 10s

    Recovery time

    ≤ 8s

    Signal stabilization

    (within a certain range)

    ≤ ±20 ppm, signal period is more than 1000 hours.

    Signal stabilization (zero)

    ≤ ±20 ppm, signal period is more than 1000 hours.


    Pump suction sampling, flow rate 1L/min

    Zero drift

    ≤ ±1% (F.S./year)

    Linear error

    ≤ ±1%


    8000 groups of data.


    Can be connected to PC, direct print historical data. (optional)


    3.5 inch OLED display, legible in the sunlight.

    Power supply

    Built-in lithium battery, fully charged within 3 hours, continuously working for more than 12 hours.

    Peak current

    < 700 mA

    Average power

    < 2 W

    Air pressure

    800 ~ 1150 hPa


    0 ~ 95%RH

    Work temperature

    -20℃ ~ 50℃

    Storage temperature

    -20℃ ~ 60℃


    240*215*115 mm


    1.5 kg


    Main unit

    1 set


    1 piece

    Hand-held probe

    1 piece

    Anti-slip belt

    1 piece

    Hose 600 mm

    1 piece

    User’s guide

    1 copy

    Warranty card

    1 copy

    Address: F/10, Block B7, JinYinTan Modern Enterprise City, Dongxihu District, Wuhan, China
    Email: info@hvhipot.com
    Skype: hvhipot@hotmail.com
    Tel: +86-27-85568138
    Fax: +86-27-65606183
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