RASI300C – Flue Gas Analyser bluetooth KIT

Compact and rugged flue gas analyser, with touch screen colour display, suitable for commercial Gas, Oil solid fuel installation

  • 5 Years Warranty including O2 & CO sensors
  • O2 long Life sensor up to 5 years
  • CO sensor 0-20000 ppm (H2 compensated)
  • Standard Bluetooth® communication for use with MRU4U mobile app ( IOS/ANDROID)
  • Menu for Flue Gas, Timed Tightness/let-By Test, CO room Build-up, T-Flow/T-Return
  • Display O2, CO, CO2, Ratio, Flue & Ambient Temperatures, efficiencies( N/G/C), excess air, flue gas dewpoint
  • Display gas pressure and combustion measurements at the same time
  • Multifuel (16) including Nat Gas, LPG, Light/Heavy Oil, Wood Pellet, Wood dry and 4 x user define
  • Li-Ion Rechargeable batteries for long lasting charge – Mini USB charging
  • New 6 Lines touch screen colour display
  • Data Logging with site ID, IRDA, SD card
  • Optional NO/NOx upgrade
  • TUV approved to EN 50379

Price: £842

Inc VAT: £1,010.40


The RASI300C is a flue gas analyser suitable to carry out installation and maintenance works on commercial Gas, Oil and Biomass fuel heating systems

The EN50379, Parts 1-2 TUV certified RASI30oC is supplied with O2 and CO H2-compensated sensor up to 20,000 ppm (NO – can be retrofitted), 300 x 8 mm triple hose robust flue gas probe, bluetooth communication to our award winning MRU4U mobile app and an all in house carrying case


Fixed Service Cost with only 2 days turnaround
The RASI 300 flue gas analyser is subjected to a fixed annual service cost of 99 GBP+ VAT which include the cost of servicing, calibration, the replacement of the O2 and/or CO cell when required and the issue of new calibration certificate with full test data valid for 12 months. This annual fixed service cost offer many advantages: low cost of ownership, keep the analyser with-in its 5 years warranty, you know exactly the running cost of your analyser, ensure that the analyser is fit for purpose and keep the analyser with-in the required legislation.



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
CO2 % ( calculated from O2) 
Range 0 to CO2% Max
Accuracy ± 0.3 % Vol
Resolution 0.1 %
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
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%
Conversions calculation 
emissions calculation ppm/o2% refer, mg/m3, mg/m3 with O2 reference
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 micro USB, IRDA and Bluetooth as standard
Data logging 4000 Data log on internal memory  & SD card
Mobile APP ( Free) MRU4U working on IOS & Android
Software (Optional) WIN4U emissions software
Gas Sampling probe 250×8 mm  gas sampling probe with integrated temperature and draught measurement
Display 4 lines touchscreen graphic colour display
Weight 390 g
Dimensions 82x169x44 mm
IP protection IP 40
Power/main Li-ION rechargeable batteries, 2250 mA/h , USB charging AC 100-240 VAC, 46-63Hz, USB lead and wall charger supplied
Operating/Storage temperature 5 to 45 °C/ -20 to 50 °C
Warranty 5  years warranty when serviced annually by EIUK
Approvals Conform to BS 7967 , TUV SUD tested to BS EN 50279-1&2


Make enquiry

RASI300C – Flue Gas Analyser bluetooth KIT