RASI 700 – Industrial flue gas and emissions analyser


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The RASI700 is a true 8-gas hand held emissions and industrial flue gas analyser which can be configured to your specific application. It is the ultimate tool for tuning and servicing industrial boilers and gas and diesel engines.

  • 6-gas choice of electro-chemical sensors for 02, CO, COlow, NO, NOlow, NO2, NO2Low, SO2 and H2S
  • 2 gas choice of NDIR sensor for CO2% and HCppm
  • Can be configured with 8 sensors at the same time
  • Integrated pressure sensor measures draught and differential pressure
  • CO sensor fresh air valve for working with high CO concentration
  • Blue-tooth® as standard for communication with mobile app
  • Works with both IOS and ANDROID devices
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The RASI 700 is an hand held industrial flue gas analyser suitable for installing, servicing and commissioning industrial boilers and burners, gas and diesel engine generators, and gas turbines.

True 8-gas industrial flue gas analyser

These compact hand held industrial flue gas analyser come as standard fitted with a Long Life O2 sensor and can be configured with up to 6 electrochemical measurement sensors ( CO, NO, NO2, SO2 and H2S) and a special designed dual range NDIR infrared sensor for direct measurement of CO2% and HC ( Hydrocarbon) in the flue. This makes the RASI700 unique in the market and a valuable solution for emissions testing at low cost. All the sensors can be installed at the same time, making the RASI700 a trough 8-gases flue gas analyser for use in industry.

In addition to the above, the RASI700 measure as standard draught ( continuously) and differential pressure and Temperature up to 1200 °C . Optionally it can be configured to measure gas velocity and mass flow using our extensive range  of type L and type S pitot tubes.

Measurements made easy

The RASI 700 smart menu guides you step by step trough the whole measurement process to make it easy and safe for the operator. The large 3.5 “ TFT graphic colour display provides information relevant to the application and guides the user through the measurements from start to finish. No instrument-specific knowledge is therefore required. Instrument settings, such as correct O2% reference and display values are activated by selecting the application. Measurement programme can be renamed by the user as required.









Measuring with high concentration of CO

The RASI700 is fitted as standard with a fresh air valve/purge pump to protect the CO cells from being damaged from unexpected extremely high levels of CO ( carbon monoxide) in the flue gas. The purge pump is automatically activated when sudden concentration of high CO occurs. The activation threshold value can be chosen by the operator.

Integrated large condensate trap

The large integrated condensate trap prevent water to enter the gas analyser and reach the gas sensors. Although being integrated, the water condensate trap is removable to make it easy to empty  it.

Remote control of the analyser using free MRU4U mobile app

The free mobile app turns your IOS and ANDROID devices into the display of the RASI700. This allow to bridge long distances when sampling points are located away from the control panels, in applications such engine generators and large boilers/burners. The mobile app include many features that enhance data collection and data reporting. Data can be shared in PDF or CSV format via email or external drivers such as dropbox, one drive etc.

Large Selection of Gas Sampling probes

The RASI700 industrial flue gas analyser offers a wide range of gas sampling probes. All our probes are modular and they measure pressure(Draught) and temperature at the same time. They come in different length starting from 365 mm trough 2000 mm either in stainless steel or Inconell 600 material to with-stand higher temperatures up to 1200°C.


O2 measurement 
Range 0 to 25 %
Accuracy ± 0.2 % Vol
Resolution ± 0.1 % Vol
CO measurement with H2 Compensation
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
Low CO measurement with H2 Compensation
Range 0 to 300 ppm
Accuracy ± 2 ppm or ± 5 % of readings
Resolution 0.1 ppm
Hi CO measurement %
Range 0 to 10%
Accuracy ± 0.02% of rdg up to 4 % 
± 10% of rdg from 4 % to 10%
Resolution 0.01 %
NO measurement (option) 
Range 0 to 5000 ppm
Accuracy ± 5 ppm or ± 5 % of reading up to 1000 ppm
± 10% of reading from 1000 to 5000 ppm
Resolution 1 ppm
Low NO measurement (option) 
Range 0 to 500 ppm
Accuracy ± 2 ppm or ± 5 % of reading
Resolution 0.1 ppm
NO2 measurement (option) 
Range 0 to 1000 ppm
Accuracy ± 5 ppm or ± 5 % of reading up to 200 ppm
± 10% of reading from 200 to 1000 ppm
Resolution 1 ppm
Low NO2 measurement (option) 
Range 0 to 100 ppm
Accuracy ± 2 ppm or ± 5 % of reading
Resolution 0.1 ppm
SO2 measurement (option) 
Range 0 to 5000 ppm
Accuracy ± 10 ppm or ± 5 % of reading up to 2000 ppm
± 10% of reading from 2000 to 5000 ppm
Resolution 1 ppm
H2S measurement (option) 
Range 0 to 2500 ppm
Accuracy ± 5 ppm or ± 5 % of reading up to 50 ppm
± 10% of reading above
Resolution 1 ppm
CO2 NDIR measurement for emissions (option) 
Range 0 to 40%
Accuracy ±0.3 % of Volume  or ± 5 % of reading 
Resolution 0.01 %  
HC NDIR measurement for emissions (option) 
Range 0 to 40000 ppm
Accuracy  ± 400 ppm or 5% reading
Resolution 10 ppm  
CO2 % ( calculated from O2) when NDIR sensor not installed
Range 0 to CO2% Max
Accuracy ± 0.3 % Vol
Resolution 0.1 %
Flue gas temperature measurement 
Range – 50 to 1200 °C
Accuracy ± 2 °C
Resolution 0.1 °C
Air Temperature measurement 
Range – 50 to 100 °C
Accuracy ± 1 °C
Resolution 0.1 °C
Flue Gas Draught measurement 
Range ± 50 mbar
Accuracy ± 0.02 mbar
Resolution ± 0.001 mbar
Pressure measurement 
Range – 300 to 300 mbar
Accuracy ± 0.02 mbar
Resolution ± 0.001 mbar
CO/CO2 Ratio Calculation 
Range 0 to 99999
Resolution 0.0001
Efficiency (Net, gross, Condensing) calculations 
Range 0 to 120% ETA
Resolution 0.1 %
Air Ratio Calculation 
Range 1 to 9.99
Resolution 0.01
Excess Air Calculation 
Range 0 to 99.9 %
Resolution 0.1%
Heat losses Calculation 
Range 0 to 9.99 %
Resolution 0.1%
Flow Gas measurement (option) 
Range 3 to 100 m/sec
Accuracy ± 1 m/sec or ± 3% of reading
Resolution 0.1 m/sec
Conversions calculation 
emissions calculation ppm/o2% reference, mg/m3, mg/m3 with O2 reference, NOx mg/m3 in term of NO2
Pres-set fuels Nat Gas, Heavy Oil Light Oil, LPG, Propane, Butane, Kerosene,Coal, Diesel,Petrol,Coke, Anthracite, Wood@0%, Wood@10%, Wood@20%, Wood@30%, Wood@40%, Wood@50%, Pellets
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) MRU4WIN emissions software
Display 3.5″ TFT color display, 6 lines , graphic
Weight 750 g
Dimension 110 x 225 x 52 mm
IP protection IP 21
Power/main Li-Ion  internal rechargeable batteries, USB charger/lead supplied
Operating/Storage temperature 5 to 45 °C/ -20 to 50 °C
Warranty 2 years on instrument, 2 years on O2 sensor, 1 year on all other sensors
Approvals Independently tested to BS EN 50379-2