UEi C50
Combustion Analyzer

  • Measures: flue temperature and oxygen
  • Calculates carbon dioxide, gross/net efficiency and excess air
  • Infrared printer ports allows for printing results to an optional printer with date and time
  • Large back-lit LCD, 2 line display
  • Protected boot with an integral magnet
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UEI C50 Shown

Product Information
Datasheet 406 KB PDF
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The C50 Combustion Analyzer helps technicians achieve combustion efficiency quickly, accurately, and easily! Perfect for residential and light commercial efficiency testing and tuning of furnaces, and hot water heaters.
Specification C50
Parameter Resolution Accuracy Range
Temp Measurement
Flue Temperature 1°F/°C ±5°F (2°C)
±0.3% reading
32-1112°F, (0-600°C)
Gas Measurement
Oxygen 0.1% ±0.2%* 0-21%
Carbon Dioxide 0.1% ±0.3% reading 0-30%
Efficiency 0.1% ±1.0% reading 0-99.9%
Excess Air 0.1% ±0.2% 0-250%
Pre-Programmed Fuels
Natural Gas, Propane, Butane, LPG, Light Oil
Weight 2.2lbs.
Handset 8" (200mm) x 2" (45mm) x 3.5" (90mm)
Probe L 12" (300mm) x Dia 0.25" (6mm) with 8" (200mm) long stainless steel shaft,
type K thermocouple and 9ft (3m) long neoprene hose
Ambient Operating Range 32-104°F (0°C to 40°C)10% to 90% RH non-condensing
Battery x4 “AA” >8 hours continuous use
Warranty 3 year limited warranty (2 year sensor warranty)
Ordering Information
Model  Description Buy Online Price
C50 UEI C50UEI Combustion Analyzer O2 and Flue Temp.  Buy Now Sale $305.96
(Reg. $424.95)
C50/OILKIT UEI C50OILKIT Combustion Analyzer Kit   Buy Now Sale $412.52
(Reg. $572.95)
Included Accessories
  • 1 - Flue Probe KMCP2
  • 1 - Manual
  • 1 - 3 Year Limited Warranty (2 year on sensor)
Optional Accessories
AACA4 UEI AACA4 Adapter, AC 9V 700mA  Buy Now Sale $21.29
(Reg. $26.95)
KMIRP2 UEI KMIRP2 Printer Infrared  Buy Now
KMCP2 UEI KMCP2 Flue Probe,for Eagle Series  Buy Now Sale $146.69
(Reg. $190.50)
SPT1 UEi SPT1 Smoke Pump Tester Kit  Buy Now Sale $92.38
(Reg. $127.95)
17631 UEi 17631 Replacement Particle Filter for Eagle Combustion Analyzers  Buy Now Sale $8.30
(Reg. $9.22)
17631PACK UEI 17631PACK Particle Filter, 10 PACK Discontinued
See: 17631