Ultra High Sensitivity SF6 Gas Leak Detector - Q200

Q200,an over 30-years of high quality product, is the ultimate in instrumentation for high-sensitivity tracer gas leak detection. It is designed to locate and quantify leaks in industrial, military and laboratory applications. The first generation Q200 – Modle:iTi Qualitek 200 - SF6 leak detector was developed by AI Qualitek in UK in 1991. The world's advanced Electron Capture (ECD) principle is used in the SF6 Leak Detector Q200. The advent of ECD principle makes the qualitative detection of electron-negative substances achieve a qualitative leap, which is one of the three breakthroughs in trace detection in the 21st century. In 2002, Uson Ltd., who is the World Leader in Leak Testing in USA took over the production and sales of Q200,Modle:Qualichek Q200. In 2015, all of the manufacture and business was transferred to D-Industrial Shanghai. After nearly 30 years of iterative update, the Q200 now has higher accuracy, sensitivity and stability, and is close to perfect in detection performance. At present, Q200 is widely used in electric power, High-Voltage Switchgear,laboratory fume hood/fume cupboard, semiconductor process, building ventilation, mine ventilation, torpedo head and military products, helicopter rotor blades, fire extinguisher testing, storage vessels, gas delivery system and other industries related to SF6 gas. Q200's high precision, sensitivity and stability and other outstanding performance have been affirmed by the users.

Specification Advantage Detail

DiscriptionUltra High Sensitivity SF6 Trace Gas Leak DetectorSensorElectron Capture(ECD)
Leak Rate

1x10-8ml/s 0.01ppm

(With optional capillary inlet,1x10-10 ml/s)

Response1 sec(85% of reading)
Concentration Sensitivity0.01ppm(10ppb)Recovery time<2 sec
Dimensions(h*w*d)43*40*23cmAccuracy±5% of reading
WeightHand Held Probe 0.9kgOptionsCalibration leaks
OutputRS232 Interface port Analogue 0-2VBattery use time20 hours
DisplayAlpha numeric VFDManufacturing StandardsISO 9001:2015,CE requirements

  • Portable and easy to use

  • Responds to SF6, refrigerants and other electron capturing compounds

  • Fast response and recovery

  • Locates position of leaks

  • Quantifies the leak rate

  • Displays leak rate or concentration

  • Measurement storage facility



The Q200 is a portable instrument, supplied in a carrying case holding the power supply and electronics,a small cylinder of compressed argon gas, and the main display panel. The detector is mounted in a hand-held probe, attached to the main unit by a 10 ft (3.5 meter)umbilical connection. A display panel is mounted in the hand probe enabling the operator to monitor measurements even when working in difficult locations.
The instrument is extremely easy to use, and provides highly accurate leak rate measurements. The response is instantaneous with quick recovery from exposure to high concentrations of trace gas.
Q200 Facilities

  • Adjustable audible alarm, activated when user's set leak rate limit is exceeded

  • Factory calibrated for SF6

  • Simple user recalibration facility

  • Diagnostic menu identifies fault conditions


  • High-Voltage Switchgear

  • Laboratory Fume Hoods/Fume Cupboards Testing( Approved for ASHRAE 110-2016 & EN 14175-3 )

  • SEMI S6 Tracer Gas Testing

  • Building ventilation

  • Mine ventilation

  • Torpedo Head of Military Products

  • Helicopter Rotor Blade

  • Testing Fire extinguisher

  • Storage Vessles

  • Gas Delivery System