Replacement CO sensor for Testo 327-1 combustion analyzer.
++PLEASE NOTE, YOU MUST HAVE FIRMWARE VER 1.14 OR GREATER TO INSTALL THIS SENSOR++
User replaceable ONLY IF YOUR ANALYZER is using FIRMWARE 1.14 or greater. (Firmware version is shown at the beginning of the analyzer's power up sequence.)
Please note: image on the left is the new replacement sensor, The image on the right is the old sensor.
Call us at 1-888-224-3437 with any questions or help in determining your firmware revision.