Fieldpiece Combustion Checker Provides Quick and Easy Furnace TuningNEW YORK — The new SOX3 combustion checker from Fieldpiece Instruments provides all the essential measurements needed to tune most combustion equipment. Measures flue temperature and percent O2, and calculates percent CO2, percent excess air, and combustion efficiency.

For extra convenience, the SOX3 provides a field replaceable oxygen sensor, custom fuel input for unconventional fuels, and hands-free testing.

For more information, visit