Geotech Biogas 5000 Portable Gas Analyser

Code: BM5K
  • Modular and upgradeable
  • 3 year warranty
  • Up to 6 gases

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The Geotech Biogas 5000 is suitable for monitoring biogas in farming, wastewater, and food processing sectors or for CH4 recovery and hazardous anaerobic digestion sites.

Helping you gauge the efficiency of your digestion process so gas levels can be changed for optimum performance.

There is no need for an anemometer to be self-certified; the Biogas 5000 validates results in conformance with PPC (Pollution Prevention and Control). The unit can be configured according to the user’s specifications.

A portable, durable detector with an internal pump powered by a rechargeable battery, allowing 8 hours of use from a full charge. Designed to be easy to use, maintain and calibrate.


  • Certified: ATEX, IECEx, CSA, MCERTS and UKAS calibration (ISO17025)
  • Supplied with sensors;  CH4 (0-100%); CO2 (0-100%) (infrared) & O2 (0-25%) (electrochemical)
  • Optional measurable gases include H2 (0-1000ppm), NH3 (0-1000ppm), and H2S (0-50, 200, 500, 1,000, 5,000 or 10,000ppm)
  • Confirm the desulphurisation process is working correctly, measuring pre & post levels
  • CH4 and CO2 accuracy ± 0.5% after calibration
  • Event log, data storage & profiling function. 10 IDs, 500 readings. Gas analyser manager software (GAM) required
  • Check engine efficiency & life expectancy by monitoring sulphur levels
  • Multi-language English, French, German, Spanish, Portuguese, Italian, Chinese & Polish
  • Accessories: pitot tube for flow measurement; an ATEX anemometer, and an ATEX temperature probe for flow measurement
  • 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
Biogas 5000 datasheet 320 KB
Biogas 5000 Manual 2 MB
GA5000 & Biogas configurator 261 KB

Additional information

Weight 0.09 kg


Batery type Rechargeable nickel metal hydride batery pack (not user replaceable)
Batery life Typical use 8 hours from fully charged
Batery charger Separate intelligent batery charger powered from mains supply (100- 240V)
Charge tme Approximately 4 hours from complete discharge
Gases measured CH4 and CO2 – By dual wavelength infrared sensor with reference channel
O2 – By internal electrochemical cell
H2S/H2/CO/NH3 – By internal electrochemical cell
Standard gas cells CH4 – 0-100%
CO2 – 0-100%
O2 – 0-25%
Optonal gas cells H2S – 0-50ppm
H2S – 0-200ppm
H2S – 0-500ppm
H2S – 0-1,000ppm
H2S – 0-5,000ppm
H2S – 0-10,000ppm
CO – 0-500ppm
CO – 0-1,000ppm
CO – 0-2,000ppm
CO (H2)* – 0-2,000ppm
NH3 – 0-1,000ppm
H2 – 0-1,000ppm
Typical accuracies All typical accuracies quoted are afer calibraton
*Hydrogen compensated carbon monoxide measurement Hydrogen cross gas effect on carbon monoxide approximately 1%.
Do not use where hydrogen is in excess of 10,000 ppm.
Response tme, T90 CH4 – ≤10 seconds
CO2 – ≤10 seconds
O2 – ≤20 seconds
H2S – ≤30 seconds
CO – ≤30 seconds
NH3 – ≤90 seconds
H2 – <90 seconds
Flow 550 ml/min typically
Flow fail point -200 mbar vacuum – user setable
Maximum vacuum restart -250 mbar approximately with flow rate of approx 250ml/min
Temperature measurement -10°C to +75°C with optonal probe
Temperature accuracy ±0.5°C with optonal probe
Flow measurement Via Pitot tube, orifice plate, or anemometer
Alarm User selectable alarms
Communicatons Via USB lead or wireless Bluetooth**
Relatve pressure measurement ±250 mbar
Relatve pressure accuracy ±4 mbar typically (should be zeroed before reading) to ±15 mbar max
Barometric pressure measurement 500 to 1500 mbar, ±5 mbar accuracy
Available memory 10 IDs**, 500 readings
Operatng temperature range -10°C to +50°C
Atmospheric pressure range 700 to 1200 mbar
Relatve humidity 0-95% non condensing
Case seal IP65

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