Bacharach PCA 3 225 Portable Combustion Analyzer (O2, CO) - DISCONTINUED


Key Features:

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  • Measures O2 and CO gases simultaneously 
  • Exclusive B-Smart pre-calibrated sensors for easy field replacement or upgrades
  • 3.5 inch color LCD with customizable layout and zoom for viewing the readings you want to see
  • Ten standard fuels with option to add up to 2 additional fuels to the library
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Bacharach’s PCA3 225 (0024-8440) Portable Combustion Analyzer (O2, CO) is the ideal device for validating safe operating conditions, evaluating combustion efficiency and performing emissions testing.

The PCA3 225 comes equipped for simultaneous O2 and CO measurement. Users can even add or replace sensors out in the field without the worry of down time with the B-Smart pre-calibrated sensors. More still, the PCA3 is equipped to calculate values such as efficiency, CO2 and CO air-free in order to monitor combustion processes more effectually and precisely.

The PCA3 is manufactured for on-demand or semi-continuous sampling of light industrial, institutional, commercial and residential furnaces, boilers and appliances. The analyzer satisfies a range of applications as it is compliant with regulations like U.S. EPA test methods, EN 50379, CTM-030 and state/local protocols including SCAQMD. Constructed with durable metal gas and draft connectors, the PCA3 225 Portable Combustion Analyzer (O2, CO) is an essential asset to a range of industries.


Check out Bacharach’s complete PCA3 Portable Combustion Analyzer Series (Click on the part numbers):


PCA3 225 (O2, CO)


PCA3 235 (O2, CO, NO)


PCA3 245 (O2, CO, CO High)


PCA3 255 (O2, CO, SO2)


PCA3 265 (O2, CO, NO, NO2)


PCA3 275 (O2, CO, NO, SO2)


PCA3 285 (O2, CO, NO, CO High)


PCA3 225 Kit (O2, CO, Printer)


PCA3 235 Kit (O2, CO, NO, Printer)


PCA3 245 Kit (O2, CO, CO High, Printer)


PCA3 255 Kit (O2, CO, SO2, Printer)


PCA3 265 Kit (O2, CO, NO, NO2, Printer)


PCA3 275 Kit (O2, CO, NO, SO2, Printer)


PCA3 285 Kit (O2, CO, NO, CO High, Printer)


PCA3 295 (O2, CO, NO2, SO2)


PCA3 295 Kit (O2, CO, NO2, SO2, Printer)


All kits include (unless otherwise noted):

  • • Probe with 12 in. sample tube (approximately 6 ft. total length), water trap, particulate filter and probe stop
  • • Spare filters (qty. 3)
  • • Protective rubber boot
  • • 4x AA batteries
  • • Fyrite® User Software
  • • USB cable
  • • User manual
  • • Hard carrying case



  CO (low-range, H2-compensated)

  CO (high-range, optional)

  NO (optional)

  NO2 (optional)

  SO2 (optional)

  Stack temperature

  Primary/ambient air temperature

  Draft/differential pressure



0 to 20.9%

0 to 4000 ppm

4001 to 20,000 ppm

0 to 3000 ppm

0 to 500 ppm

0 to 5000 ppm

-4 to 2192 °F (-20 to 1200 °C)

-4 to 999 °F (-20 to 537 °C)

± 72 inH2O (± 179 mbar)


3.5 in. color LCD w/backlight


4x AA batteries or optional wall adapter

Run Time

10 hours minimum (alkaline batteries)

Size (H x W x D)

9.0 x 3.0 x 2.5 in. (22.9 x 7.6 x 6.3 cm)


2.4 lb. (1.1 kg) including batteries and probe

Fuels [1]

Natural gas, coal, oil 2/4/6, wood, kerosene,
bagasse, propane, butane, LPG, digester gas, KOKS,
LEG, biofuel, +2 optional custom fuels

Operating Conditions

Analyzer: 32 to 104 °F (0 to 40 °C), 15 to 90% RH
(non-condensing), 1 ATM ± 10%

Probe tip [2]: 1000 °F (538 °C) maximum, 10 inH2O
(25 mbar) maximum draft

Warm-up Time

60 seconds


1000 locations (500/ea for manually-saved and
automatic/data-logged records)


USB 2.0 (mini-B), IrDA


CE mark, EN 50379-2


2 years (including sensors)

[1] Depending upon combustion equation setting (North American or Siegert) – see manual for details

[2] For standard 12 in. probe, P/N 0024-3004

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