The BTU-4400 is a NEW hand-held industrial gas analyzer that is a valuable tool designed for emissions monitoring and maintenance & tuning of combustion processes including boilers, burners, gas & diesel engines, turbines, furnaces, kilns, heaters, and laboratory analysis.
BTU-4400 Features include the following:

Up to Four Gas Sensors:
O2, CO, NO, & NO2 OR O2, CO, NO, & SO2
Dilution Pump For CO Auto-Range Measurements Up To 50, 000 ppm
Low NOx Capable with 0.1ppm resolution
Gas Sensors are Pre-Calibrated & Field Replaceable
Efficiency, Excess Air, & CO2 Calculations
Built-In Impact Printer ( non-thermal)
Stack Gas & Air Temperature Measurements
Draft & Differential Pressure Measurements
External Water Trap for Condensate Removal
Rechargeable Lithium Ion Battery Pack
Unbreakable Metal Hose Connectors
Internal Memory ( up to 900 tests)
PC Software Package