E Instruments’ BTU900-C Combustion & Safety Analyzer features field-replaceable sensors for easy diagnostics and replacements. This unit comes with memory and software. It also includes: carbon monoxide sensor (0 to 8000 ppm), CxHy Hydrocarbon sensor (0% to 5%), unbreakable metal connections, Bluetooth wireless communication, built-in manometer, built-in thermometer (ambient and flue gas), built-in CO leak detector (safety), dual hose (9’) and 12” probe. Rechargeable battery and AC charger are standard.