The GEM5000 is an easy to use portable gas analyser designed to aid balancing the gas field, maximise power output and ultimately maximise revenue from CH4 extraction


  • Measures % CH4, CO2 and O2
  • CH4 and CO2 accuracy +/-0.5% after calibration
  • Modular and upgradeable
  • On board context-sensitive help
  • Minimum O2 gas recorded
  • Records static and differential pressure
  • Choice of user settings


  • ATEX, IECEx, MCERTS, CSA and UKAS calibration (ISO17025) certified
  • Aids balancing of gas field
  • Real time adjustments can be made
  • Maximise power output from site
  • Easy to read
  • No need for self-certification of anemometer
  • Maximise revenue from CH4


  • External gas flow devices: anemometer (ATEX) / pitot tubes
  • Optional Gas Analyser Manager Software (GAM) for ID set up and data download
  • H2 compensated CO
  • Choice of additional gases including H2S to 10,000ppm
  • GPS / field navigator
Need more information?

Please contact +6221-5467618, +6221-54212399 or email [email protected]


  • Certifi  : ATEX, IECEx, CSA, MCERTS and UKAS calibration (ISO17025)
  • Measures % CH4, CO2, O2
  • Records static and differential pressure
  • Choice of user setti gs and simple gas reading function
  • Calculates gas fl w (m3 / h) and calorifi  value (KW or BTU) (external flow device and Gas Analyser Manager soft  are required)
  • CH4and CO2 accuracy ±0.5% after calibration
  • Modular and upgradeable
  • 3 year warranty
  • Robust design for market leading reliability
  • Datalogging and profi  g function
  • Up to 6 gases monitored

Technical Specifications

Battery type Rechargeable nickel metal hydride battery pack (not user replaceable)
Battery life Typical use 8 hours from fully charged
Battery charger Separate intelligent 3A battery charger powered from mains supply (100-240V)
Charge time Approximately 4 hours from complete discharge



Gases measured

CO2 and CH4 By dual wavelength infrared sensor with reference channel
O2 By internal electrochemical sensor
CO (H2 compensated), H2S, NH3 and H2



By internal electrochemical sensor

A full range of internal gas cells can be specified at the time of manufacture


Standard gas cells

Cell Range Typical accuracy (range : accuracy) Typical accuracy (range : accuracy)
CH4 0-100% 0-70% : ±0.5% (vol) 70-100% : ±1.5% (vol)
CO2 0-100% 0-60% : ±0.5% (vol) 60-100% : ±1.5% (vol)
O2 0-25% 0-25% : ±1.0% (vol)








Optional gas cells

Cell Range Typical accuracy
CO 0-500ppm ±2.0% FS
CO 0-1,000ppm ±2.0% FS
CO 0-2,000ppm ±2.0% FS
CO (H2) + 0-2,000ppm ±1.0% FS
H2S 0-50ppm ±1.5% FS
H2S 0-200ppm ±2.0% FS
H2S 0-500ppm ±2.0% FS
H2S 0-1,000ppm ±2.0% FS
H2S 0-5,000ppm ±2.0% FS
H2S 0-10,000ppm ±5.0% FS
NH3 0-1,000ppm ±10.0% FS
H2 0-1,000ppm ±2.5% FS
Typical accuracies All typical accuracies quoted are after calibration
*Hydrogen compensated carbon monoxide measurement Hydrogen cross gas effect on carbon monoxide approximately 1%. Do not use where hydrogen is in excess of 10,000ppm




Response time, T90

CH4 ≤10 seconds
CO2 ≤10 seconds
O2 ≤20 seconds
CO ≤30 seconds
H2S ≤30 seconds
NH3 ≤90 seconds
H2 <30 seconds
Flow 550 ml / min typically
Flow fail point -200 mbar vacuum- user settable
Maximum vacuum restart -375 mbar approximately with flow rate of approx 80ml / min
Temperature measurement -10°C to +75°C with optional probe
Temperature accuracy ±0.5°C with optional probe
Flow measurement Via Pitot tube, orifice plate, or anemometer
Energy measurement Calculated using gas concentrations, flow, and temperature readings
Alarm User selectable alarms
Communications Via USB lead or wireless Bluetooth*
Relative pressure measurement ±500 mbar
Relative pressure accuracy ±4 mbar typically (should be zeroed before reading) to ±15 mbar max
Barometric pressure measurement 500 to 1500 mbar, ±5 mbar accuracy
GPS sensor Location and positioning
Available memory 2,000 IDs *, 4000 readings, 2,000 events *
Operating temperature range -10°C to +50°C
Atmospheric pressure range 700 to 1200 mbar
Relative humidity 0-95% non condensing
Case seal IP65
Weight 1.6kg
Size L 220mm, W 155mm, D 60mm
Case material ABS / polypropylene with rubber over-moulding
Keys Alpha-numeric keypad with “tactile” membrane
Display Ultra-clear high resolution 4.3” full colour TFT
Connections Colour coded gas inlet, outlet and pressure ports. Waterproof USB port, anemometer and charger / temperature probe connections.
Gas sample filters External user changeable 2.0μm ptfe water traps
ATEX II 2G Ex ib IIA T1 Gb (Ta =-10°C to +50°C)
MCERTS MC / 130239
ISO17025 Calibration to UKAS certificate number 4533
CSA Ex ib IIA T1 (Ta=-10°C to +50°C) (Canada), AEx ib IIA T1 (Ta=-10°C to +50°C) (USA)
* Gas Analyser Manager software required.
Important note: The information in this document is correct at the time of generation.

We do however, reserve the right to change the specification without prior notice as a result of continuing development.


GEM5000 datasheet