
TPI 708A740OIL Combines: 708 Combustion Efficiency Analyzer, 621 Digital Manometer, A788 Smoke Test Pump & Filter Paper, A790 Analog Oil Pressure Gauge and the A740 Infrared Printer - TPI Model 708 Combustion Efficiency Analyzer. The carbon monoxide sensor used in TPI combustion efficiency analyzers feature an on-board filter capable of filtering NO (nitric oxide), NO2 (nitrogen dioxide) and NOX (combination of NO and NO2) to prevent cross sensitivity errors.



