Check the listing for details. Testo 327-1 Flue Gas Analyzer Kit with printer works great filter sensor needed. Condition: Used. Listed at 466.00 USD. Complete kit with probes Testo 327-1 Flue Multi- Gas Analyzer Kit with printer works great Sets filter sensor needed (OUT OF DATE)Cal exp 12- 2024The testo 327-1 Flue Gas Analyser offers a robust and simple entry into flue gas analysis for domestic boilers. It measures O2 & CO , and will calculate ratio, CO2, etc. The 4-line LED display can be configured to the users requirements, and its back-lighting function guarantees an easy-to-read display even if lighting conditions are unfavourable. The analyser stands out on account of its easy menu navigation and ergonomic housing as well as its durability.