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GasCheck G3


Quick Overview


  • Micro Thermal Conductivity Sensor for enhanced sensitivity

  • Three variants available; G1, G2, G3

  • Choice of reading in cc/sec, mg/m³ or ppm

  • Graphical icon display menu for international markets

  • Rapidly detects almost any known gas or gas mixture – particularly sensitive to ammonia, argon, butane, helium, hydrogen, SF6

  • Reliable, stable and repeatable readings

  • Conveniently calibrated against helium

  • LCD back lit display

  • Hand held and robust

The GasCheck G gas leak detector is available in 3 distinct variants. See below for details.

Availability: In stock



The GasCheck G gas leak detector represents the latest in gas detection technology. Its advanced system of micro thermal conductivity enables improved 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 indicate the leak present.

The GasCheck G leak detector 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.

Feature G1 G2* G3
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    


A GasCheck G3 Kit  includes:

  • GasCheck G3 Instrument
  • Batter Holder
  • Long Probe Assembly
  • Drilled Box Spanner
  • Standard Universal Case
  • Printed Quick Start Guide 

Additional Information


Micro thermal conductivity detector (MTCD)
Sensor is poison resistant with over range protection

Battery Type: 4 x alkaline AA size or NiMH (rechargeable)
Typically 40 hours life

He 1 x 10-5, CH4 5 x 10-5, R12 5 x 10-5, Ar 1 x 10-4

± 5% Displayed reading ± One digit

T90 = 1 second rise and clear down
Flashing LED and 90 dBA (at 10 cm) audible sounder

Factory calibrated to fully documented procedures in accordance with our ISO 9001:2008 Quality Management System

10 data points

2 cc/min

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)

Instrument with probe:
390 x 60 x 49 mm, 15.5 x 2.3 x 1.9”
Case: 420 x 320 x 97 mm, 16.5 x 12.5 x 3.8”
Instrument: 0.45 kg, 1 lb, Packed 1.6 kg, 3.5 lb