The BTU 1000 portable combustion flue gas analyzer now offers a field-replaceable NOx filter to ensure the most accurate CO readings. This portable and multifunctional unit can be used for service and maintenance purposes for units including boilers, heaters, and other residential and/or commercial applications. It measures O2, CO, CO2, efficiency, excess air, ambient and flue gas temperature, draft and differential pressure, ambient CO monitoring, and 10 different fuels and oils (user-defined). The analyzer has a built-in nonthermal paper printer. It comes standard with a two-year sensor warranty.

E Instruments, HVAC Dept., 172 Middletown Blvd., Ste. B201, Langhorne, PA 19047; 215-750-1212; 215-750-1399 (fax);

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