GasCheck G Instrument User Manual V2.4
Unrivalled Gas Detect
ion.
Page 6 of 26
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Instrument description
The GasCheck G is a range of portable hand held gas detector instruments predominantly used for detecting gas leaks
and can detect almost all gases to varying degrees. Being a hand held instrument it is powered by standard AA size
batteries and will accept both Alkaline and Nickel Metal Hydride (rechargeable) types.
The GasCheck G uses thermal conductivity as it's means of detecting gas which offers a robust sensor technology that
requires practically no maintenance beyond annual servicing.
All GasCheck G models have an easy to use graphical interface with an intuitive keypad allowing simple function
selection and adjustment.
The GasCheck G is a range of instruments that can be upgraded to add features without the need to be returned to
the supplier and without having to modify the internal firmware.
GasCheck G has an LCD display, LED indicator and audible sounder that indicates the detected signal.
Common applications where The GasCheck G is already used include:
* Quality assurance - Testing seal integrity after product manufacture
* Laboratory applications - Detection of leaks from mass spectrometers and chromatograph
equipment
* Industrial - Leaks from gas cylinders, pipe work and process equipment
* Medical - Testing of membrane materials and sealing of glove boxes
* Pneumatic - Valve seal testing
The GasCheck G is calibrated against a 5 E-4 cc/s Helium leak to allow volumetric readings and also a 5000ppm Helium
to allow measurement of concentrations.
Selectable units:
cc/sec
Cubic Centimetres per Second offers a reading that indicates the volume of gas escaping into
atmosphere from a single point. ie. leakage from a hole in a gas filled vessel or pipe.
ppm
Parts Per Million is a concentration reading, GasCheck G will display the concentration being
detected however it is more difficult to gauge the quantity of leakage.
mg/m
3
Milligrams per meter cubed is also a unit that measures concentration. (See ppm above)
g/yr
Grams per Year is an alternative measure of leak rate.
The GasCheck G range is NOT intrinsically safe so should not be using in a potentially
explosive environment.
Ambient air pressure, heat and humidity can also affect readings.
The GasCheck G range is NOT 'Gas Specific' i.e. It can NOT differentiate between gases.
