RASI700BIO – Portable Gas Analyser for BIOGAS applications

Portable gas analyser, robust and easy to use, designed to accurately sample gas quality with-in biogas and landfill applications. The Analyser can be configured to measure:

  • O2 ( 0-25 %), CH4 (0-100%), CO2 (0-100%)
  • Optional H2S ( 0-5000/10000 ppm), H2 (0-2000 ppm) sensors
  • Optional CO (0-20000 ppm) sensor
  • Optional Flow Gas measurement


The RASI 700 BIO is a portable biogas analyser ideal for measuring gas in landfill, biogas, and waste water treatment plants.

The unit can be configured to measure 02, CO2%, CH4%, H2S and additionally H2 and CO to match the needs of the operators working in landfill applications.

In addition, the analyser provides temperature and pressure readings ( differential, gauge and absolute) as standard, and optionally can measure gas flow by using our unique 3 ways straight pitot tube which enable the user to sample and display gas velocity, gas quality and temperature at the same time.

The gas analyser is powered by high efficiency Li-ION rechargeable batteries which ensure a full day of operation with one single charge. Batteries are charged trough standard USB port.

The biogas readings are presented on its large 3.5″ TFT  6 lines colour display.

The RASI700 BIO is equipped as standard with an extensive data logging function and site administration facility with pre-load measurement points such as well ID’s . Up to 16000 data can be stored in the analyser internal memory and exported to SD card for future analysis on a PC. No specific software is required.

The RASI700 BIO is compatible with our new mobile phone app (both IOS and ANDROID devices) which allow to use your phone to save stream data, save data and generate PDF report. The mobile app also provide GPS position

The RASI700 BIO requires only one calibration per year

The unit is supplied as standard with a light carrying case which contain USB charger lead, wall charger, in-car charger, tubing,  manual and a 12 month valid calibration certificate.


  • Measure O2 (0-25 %), CH4 (0-100%) and CO2 (0-100%) as standard
  • Optional H2S ( 0-5000 ppm,)  H2 and CO
  • Flow gas measurement with straight pitot tube
  • Best in class CH4 % measurement which is fully temperature and pressure compensated
  • Robust and easy to use
  • Work with MRU4U mobile app for Android and IOS devices
  • Support text information via MRU4U mobile app
  • Large storage capability
  • Strong gas sampling pump
  • 12 months re-calibration interval
  • high efficiency Li-IOn battery for long operation


O2 measurement (Standard)
Range 0 to 25 %
Accuracy ± 0.2 % Vol
Resolution ± 0.01 % Vol
CO measurement with H2 Compensation ( Optional)
Range 0 to 20000 ppm
Accuracy ± 10 ppm or ± 5 % of reading up to 4000 ppm
± 10% of reading from 1000 to 20000 ppm
Resolution 1 ppm
CO2 %  NDIR   (Standard)
Range 0 to 100 %
Accuracy ± 0.3 % Vol or 3 % of reading
Resolution 0.01 %
CH4%  NDIR  (standard)
Range 0 to 100 %
Accuracy ± 0.2% Vol  or ±  3% of the readings
Resolution 0.01% Vol
H2S (Optional)
Range 0 to 5000 ppm
Accuracy ± 5 ppm or 5 % reading
Resolution 1 ppm
Range 0-to 10000 ppm ( max 50000 ppm short exposure)
Accuracy ± 50 ppm
Resolution 1 ppm
H2 (Optional)
Range 0-2000 ppm
Accuracy ± 5 ppm or 5 % reading
Resolution 1 ppm
Flow measurement ( using pitot tube) (Optional)
Range 3 to 100 m/s
Accuracy ± 1 m/s or 3 % reading
Resolution ± 0.1 m/s
Pressure measurement ( gauge, vacuum and differential) Standard
Range – 300 to 300 mbar
Accuracy ± 0.02 mbar
Resolution ± 0.01 mbar
Temperature & differential temperature ( Type K thermocouple) Standard
Range -5 to 1200 °C
Accuracy -2 °C
Resolution 0.1 ° C
Barometric Pressure (Standard)
Range 850-1150 mbar
Resolution 0.1 mbar
Accuracy 1 to 9.99
Resolution 0.01
Flow Gas measurement (option) 
Range 3 to 100 m/sec
Accuracy ± 1 m/sec or ± 3% of reading
Resolution 0.1 m/sec
Digital & Software 
Communications mini USB, IRDA and Bluetooth as standard
Data logging 16000 Data log on internal memory  & SD card
Mobile APP ( Free) MRU4U working on IOS & Android
Software (Optional) WIN4U emissions software
Pump  Rate ( internal) 60 l/hr
Included accessories Water trap with filter, sampling hose, LI-ION rechargeable batteries, USB charger, charger lead and wall charger, soft caarrying case with space for analyser and accessories
Display 3.5″ TFT colour display, 6 lines , graphic
Weight 750 g
Dimension 110x225x52
IP protection IP 21
Power/main LI-ION  AC 100-250 VAC, USB charger/lead supplied
Operating/Storage temperature 5 to 45 °C/ -20 to 50 °C
Warranty 1 year
Notes: Specification might change with-out prior notice due to contonuos product improvement

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RASI700BIO – Portable Gas Analyser for BIOGAS applications