Gascheck G handheld helium leak detector

Gas leak detector for rapid, accurate gas leak measurement

The GasCheck G gas leak detector represents the latest in gas detection technology. Its advanced system of micro thermal conductivity enables advanced sensitivity for the rapid, effective detection of gas leaks down to cc/sec, mg/m³ or ppm levels.

Designed for the search and location of gas leaks, the GasCheck G leak detector provides you with effective detection of almost any gas or gas mixture. Robust and reliable, the GasCheck G leak detector gives stable, repeatable readings of the detected gas.

The instrument’s LCD display, LED indicator, and audible sounder clearly indicates the gas leak present.

GasCheck G automatically zeros to the ambient air around it when switched on and is ready to detect immediately. The instrument’s easy to use graphical interface and intuitive keypad allows for simple function, selection, and adjustment.

Upgradeable throughout the range, the GasCheck G gas leak detector is available in three distinct versions; G1, G2 and G3 with varied capabilities. Features can be easily added to upgrade the instrument without it having to be returned to the factory.

Ion Science also offers a leading range of leak detectors:

Handheld Gas leak detector

Key Features

Best available leak detection

  • Fast, accurate leak detection at highly sensitive levels
  • Detects almost any known gas or gas mixture
  • Particularly sensitive to ammonia, argon, butane, helium, hydrogen and SF6
  • Reliable, stable, repeatable readings

Ease of use

  • Simple, one-handed operation
  • Large, clear LCD back lit display for easy viewing
  • Graphical icon menu
  • Conveniently calibrated against helium


  • Choice of readings in cc/sec, g/yr, mg/m³
  • Easily upgradeable throughout the range

Low cost operation

  • Inexpensive consumables and parts
  • 2 year warranty when instrument registered online
Gas leak detector

What’s included

For full details please contact Ion Science or an Ion Science distributor for an up to date price list.

Gascheck G3 Kit (part no. GG3SAXXS-X):

  • GasCheck G3 Instrument
  • Battery Holder
  • Long Probe Assembly
  • Drilled Box Spanner
  • Standard Universal Case
  • Printed Quick Start Guide (we recommend downloading the Instrument Manual.)

Product downloads – Ion Science

Product downloads - Ion ScienceFor all downloadable resources please click here

Brochures, Manual, Quick Start Guides, Software etc.

Technical Specification

Technical Specification


Detector Micro thermal conductivity detector (MTCD)
Sensor is poison resistant with over range protection
Operation Battery Type: 4 x alkaline AA size or NiMH (rechargeable)
Typically 40 hours life
Sensitivity (cc/sec)
He1x10-5,CH4 5×10-5,R125x10-5,Ar1x10-4
Accuracy – 5% Displayed reading – One digit
Response T90 = 1 second rise and clear down
Sound Flashing LED and 90 dBA (at 10 cm) audible sounder
Calibration Factory calibrated to fully documented procedures in accordance with our ISO 9001:2008 Quality Management System
Data Logging 10 data points (available for G3 only.)
Temperature Operating: -20 to +60 oC, -4 to 140 oF Storage: -20 to +70 oC, -4 to 158 oF Humidity: 0 to 99% RH (non-condensing)
Flow rate 2 cc/min
Weight & Dimensions Instrument with probe: 390 x 60 x 49 mm, 15.5 x 2.3 x 1.9”
Case: 420 x 320 x 97mm, 16.5×12.5×3.8”
Instrument: 0.45 kg, 1 lb, Packed 1.6 kg, 3.5 lb

EMC tested EN50081-1 & EN50082-1 July 98.





Rapid detection of gas leaks
Measures gas leaks (single gas)  
Measures gas leaks (up to 20 gases)  
Audible sounder      
Flashing back-lit display      
Peak hold readings    
Factory or custom calibration available    
Data logging (store up to 10 readings)  
Readings displayed in cc/sec, g/yr, ppm or mg/m3  
Selectable battery type  

*The G2 model is factory configurable only; the Gas and measurement Units must be specified with the order.

Video Support

Video Support – Gascheck G leak detector

Product Testimonials

Gascheck G leak detector

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Technical Support

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The following accessories are available for the Gas G leak detector.
For further information or pricing please contact Ion Science or your local Distributor.

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