Wohler A550SO2 (7765)
Flue Gas Analyzer with NO/NO2/SO2 Sensor

  • Comes with a sensor for NO, NO2, and SO2 measurements
  • Includes the Wohler TD 100 Thermal Fast printer as well as an Air temperature probe and clamping cone
  • Simple to use: Switch on – read off – done
  • Large, color touchscreen: Displays up to 14 measurement and calculation values
  • Intuitive to operate via on-screen keyboard
  • Calibrate in the flue gas pipe via a fresh air pump (Wohler A 550)
  • Graphic hot spot search
  • Automatic CO clean out pump protects CO sensor
  • 4-filter technology - easily accessible
  • Rechargeable battery operating time: more than 12 hours with Lithium Ion power
  • Wood moisture content measurement
  • Data transfer via USB, Bluetooth or infrared
Click here for a larger image - Wohler A550L (7753) Flue Gas Analyzer, 7Click here for a larger image
Wohler A550L Shown
Product Information
Datasheet 1.58 MB PDF
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As robust as cast iron, but as easy to operate as a smartphone – that's what Wohler's new A550SO2 flue gas analyzer feels like in your hand. Appropriately, the advantages are equally substantial: A tip with your finger on the Wohler A 550 SO2 is all that is required to perform analyses, inspections and settings on residential and commercial appliances. The flue gas analyzer is equipped with coded connections for the 4 Pa test and even a wood moisture content measurement function to VDI Guideline 4206. The individual functions can be called up as intuitively as using a smartphone via the large 7" color touch-screen. And the brightly lit monitor can be read anywhere.

The generously dimensioned screen and the clearly arranged, in part graphic presentation of readings are an absolutely ideal basis for holding discussions with customers. The analyzer is equipped with magnets, so you can attach it to the casing of the heater or boiler – and your hands are free to work. The probe is fitted with an additional start/stop button, with which it is possible to start or stop measurement readings.

There are a generous number of inter-faces available to transfer data to other management programs: USB, infrared and Bluetooth. The A-550-SO2 also comes with the TD 100 Thermal printer and a sensor for NO, NO2, and SO2 measurements as well as an air temperature probe, and clamping cone.
Product Videos
Wöhler A 550 L Combustion Analyzer Hands On
Wöhler A 550 L Combustion Analyzer Hands On
Ordering Information
Model Description Buy Online Price
MFR ID: 7765
Wohler A550SO2 (7765) Flue Gas Analyzer with NO/NO2/SO2, TD 100 Thermal Fast Printer Buy  Now Sale $4,941.00
(Reg. $5,490.00)
Included Accessories
  • NO, NO2 and SO2 sensor
  • 10 ft hose
  • 1 ft gas probe
  • Air temperature probe
  • clamping cone
  • USB charger with micro usb cable
  • Li-ion battery
  • Water stop filter
  • Coarse filter
  • 25 Wadding filters
  • Case
  • TD 100 Thermal fast printer
Optional Accessories
2463 Wohler 2463 Plastic Cone for air temperature probe Buy  Now $29.00
2494 Wohler 2494 Standard Probe Holder Buy  Now $39.00
4145 Wohler 4145 10 rolls of Printer Paper Buy  Now $43.00
4160 Wohler 4160 TD 100 Infrared Thermal Fast Printer Buy  Now Sale $314.10
(Reg. $349.00)
4288 Wohler 4288 A 500 Wadding Filters, 150 pcs Buy  Now $29.00
MFR ID: 5511
Wohler 5511 Flue Gas Analyzer Air Temperature Probe, 11" probe length, with 67" Cable Buy  Now Sale $114.30
(Reg. $127.00)
MFR ID: 5577
Wohler 5577 Heavy Duty Carrying Case with twin-wall, for A550 Flue Gas Analyzer Buy  Now Sale $198.00
(Reg. $220.00)
6142 Wohler 6142 PRFE holder for combustion air temperature Probe Buy  Now
MFR ID: 7758
Wohler 7758 Flue Gas Analyzer Upgrade Kit, air temp. probe, clamping cone Buy  Now Sale $148.50
(Reg. $165.00)
9613 Wohler 9613 7-inch Probe for A 500 Buy  Now Sale $224.10
(Reg. $249.00)
9614 Wohler 9614 20-inch Probe for A 500 Buy  Now Sale $314.10
(Reg. $349.00)
9621 Wohler 9621 Water Stop Filters, 3 Pieces Buy  Now $49.00
9632 Wohler 9632 Coarse Filters, 5 Pieces Buy  Now $26.00
9622 Wohler 9622 12-inch Probe for A 500 Buy  Now Sale $224.10
(Reg. $249.00)
9652 Wohler 9652 5-inch Probe for A 500 Buy  Now Sale $260.10
(Reg. $289.00)