Combustion Efficiency Analyzer Brand : TPI USA .... Accuracy + / -5ppm or 5% of reading whichever is greater Oxygen ( 02) Measurement : - Range 0 to 25% - Resolution 0.1% - Accuracy  ± 0.3....
709R: Combustion Efficiency Analyzer w/ .... Accuracy + / -5ppm or 5% of reading whichever is greater Oxygen ( 02) Measurement Range 0 to 25% Resolution 0.1% Accuracy  ± 0.3% Carbon....