Flue Gas Analysers

We offer 3 different types of flue gas analysers illustrated below. The A400 is a simple easy to use one handed operation unit that suits household/ residential and light commercial applications. It has a brilliant OLED colour screen to view all combustion data on one screen, all complete with a 48 month warranty on the unit as well as sensors. This also applies to the A550 that has a large 7” easy to read screen. It measure efficiency, emissions, air supply, ambient CO and a wood moisture test. There is also an industrial version where the in stack stainless steel sinter-filter protect the unit from high dust levels. The A600 offers analysis via Bluetooth measuring O², CO, NO, NO², SO², H². Field replaceable sensors provide convenience and flexibility.

Wöhler A 450 (H) Flue Gas Analyzer


  • Residential flue gas analysis
  • Service and maintenance tasks
  • Determine flue gas loss and burner tuning
  • Immission control measurements (1st BImSchV)
  • NO measurement (optional)
  • Differential pressure / gas pressure measurement


  •  Simple to use: Switch on – read off – done
  • Large 5″ color touchscreen: Displays up to 14 measurement readings
  • Intuitive to operate via on-screen keyboard
  • Graphic hotspot search


Wöhler A 400 L Flue Gas Analyzer


  • Combustion and Efficiency Analyzer for residential and light commercial applications


  • All combustion data values on a bright full color display
  • Integrated magnetic holder
  • Technician friendly 4 button keypad
  • Ergonomic shape: comfortable one hand operation
  •  Integrated 4-filter technology including water stop filter, cotton filter, sample conditioner and sensor protection
  • 2 year full warranty on instrument (including sensors)
  • Memory for 100 customer records
  • Date and time stamp


Wöhler A 550 L Flue Gas Analyzer


  • For burner adjustment and determination of combustion loss
  • For residential and commercial applications
  • Burner maintenance


  • Large 7″color-touch screen: Displays up to 14 measurement and calculation values
  • Intuitive to operate via on-screen keyboard
  • Data transfer via integrated USB- & IR-Interface
  • Large CO-measurement range: 35,000 ppm
  • Robust plastic case for safe transport


Wöhler A 600 Flue Gas Analyzer


  • Combustion measurements on heating appliances (for all types of fuels)


  • TÜV-approved for oil, gas, solid fuel
  • 4-Pa certified
  • Bluetooth ® probe
  • Up to 6 sensors possible
  • Connection for peltier cooler