VERY gently used E-Instruments BTU900-3P combustion analyzer with NOx capability. 6 tools in one:
-Built-in differential digital pressure manometer and thermometer, combustion analyzer for CO, 02, CO2, (calculates combustion efficiency, excess air, losses, CO air free) ambient room air carbon monoxide, leak detector, dra' meter (negative and positive dra') , plus emissions (NOx) measurements. Includes wireless printer, hoses and wand, charger, extra print paper, and carrying case. Professionally calibrated by certified instrumentation shop November 2024 and not used since. Certificates of calibration accompanies unit.