Testo 327 Flue Gas Analyser, testo 316i gas leak detector, rechargeable battery and calibration protocol, Flue Gas Probe (180mm x 6mm diameter), soft carry case with shoulder strap, AC power supply. The 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. • 4,000ppm CO sensor with automatic pump shut off to help prevent saturation • Fuels selectable include natural gas, propane, btane, kerosene oil, heavy oil, wood pellets • Rechargable Li-ion battery • Tightness and let-by pressure test routines included in menu (requires pressure connection adaptor) • Flow and return temperature measurement (using additional accessory probes) • Soft carry case with shoulder strap • kit includes testo 316i gas leak detector (for use with methane,propane, butane,hydrogen)