Geotech GA5000 Portable Landfill Analyser

Code: GA5K
  • For landfill & contaminated land
  • 3-year warranty
  • Lightweight

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The Geotech GA5000 is a portable landfill analyser with an internal pump that complies with environmental legislation. The rechargeable battery allows up to 8 hours of use from a full charge. Designed to be easy to use, maintain, and calibrate. The GPS field navigator option allows planning and recording of the monitoring route.

It can monitor CH4, CO2, O2, H2S and CO. Up to six gases can be measured simultaneously, with NH3 and H2 options.

Modular design allows for initial or later purchase of bore gas flow, flow logging, and ATEX-certified anemometer.

A hydrogen-compensated Carbon Monoxide sensor is helpful in closed landfill sites, where Hydrogen can interfere with CO readings.


  • Certifications:  ATEX, IECEx, CSA, MCERTS & UKAS calibration (ISO17025)
  • Choose H2S ranges up to 10,000ppm
  • 3-axis compass: exact latitude, longitude, and altitude ensure accuracy
  • Multi-lingual, easy-to-use menus. Technical assistance button guides through the monitoring process
  • Measures barometric pressure & relative pressure
  • Memory 2,000 IDs & 4,000 readings
  • Calibration < 3 minutes & history viewable
  • Option Gas Analyser Manager (GAM) software for data retrieval
  • Bluetooth connection for downloading readings wirelessly
  • Standardised monitoring routines
  • Choice of user settings
  • Peak & previous readings displayed
  • CH4 & CO2 accuracy ± 0.5% after calibration
  • Firmware updates
  • Size L 220mm, W 155mm, D 60mm. Weight 1.6kg
  • Country of origin: UK. Tariff number 9027101000
  • Manufacturer QED Environmental, Geotech. Historic brand Geotechnical Instruments

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Title Size
GA5000 Datasheet 221 KB
GA5000 Manual 2 MB
GA5000 & Biogas configurator 261 KB

Additional information

Weight 0.09 kg


Battery type Rechargeable nickel metal hydride battery pack (not user replaceable)
Battery life Typical use 8 hours from fully charged
Battery charger Separate intelligent 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), – By internal electrochemical sensor
H2S, NH3 and H2 (optional) – A full range of internal gas cells can be specified at the time of manufacture
Standard gas cells CH4 – 0-100%
CO2 – 0-100%
O2 – 0-25%
Optional gas cells CO – 0-500ppm
CO – 0-1,000ppm
CO – 0-2,000ppm
CO (H2) + – 0-2,000ppm
H2S – 0-50ppm
H2S – 0-200ppm
H2S – 0-500ppm
H2S – 0-1,000ppm
H2S – 0-5,000ppm
H2S – 0-10,000ppm
NH3 – 0-1,000ppm
H2 – 0-1,000ppm
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 – ≤90 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 from borehole 0-20 l / hr internal measurement
Flow from borehole accuracy ±0.3 l / hr
Alarm User selectable alarm levels
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)
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)

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