Key Features:
• Measures CO, CO2, ambient CO, differential temperature and pressure
• Measures NO, and calculated NOx
• Calculates O2, gross/net combustion efficiency, excess air, CO air free
• 4-line backlit LCD display
• 179 memory positions
• Real time clock
• 5-year limited warranty
UEI C157 Combustion Flue Gas Analyzer is an ideal tester for checking and correcting combustion efficiency of furnaces, boilers and water heater in residential and light commercial environment.
The NO sensor adds an important NOx test to the features of this combustion analyzer. Testing for NOx is a new requirement being implemented by many states, as it improves overall accuracy of combustion analysis.
The UEi C157 saves money over time, as it eliminates frequent change of O2 sensor, which decomposes continuously. Here is a short description of EOS technology:
EOS utilizes an electro-optical sensor (EOS) to measure CO2 levels and then uses this value to calculate O2 levels. The EOS sensor uses optical readings that keep the sensor from physical contact with the gas, thus prolonging its life greatly (up to 10 years).
UEi C157 Eagle 3X use of this sensor as well as an extended life CO sensor and elimination of a standard of O2 sensor makes the cost of upkeep on the unit much lower than others. The combustion analyzer comes with 5-year warranty, which even covers sensors. Made in United Kingdom. Ground Shipping Free in Continental US.
The C157 includes:
• Combustion Analyzer (C157)
• Flue Probe (KMCP2)
• Hard Carrying Case (AC509)
• Inlet Tube/Probe Connector (SM11103)
• Quick Start Guide
• Flue Probe (KMCP2)
• Hard Carrying Case (AC509)
• Inlet Tube/Probe Connector (SM11103)
• Quick Start Guide
• Owners Manual
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 
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