Testo 310 II Combustion Analyzer - Reliable testing of heating systems with the natural gas leak detector for beginners Heating fitters and technicians need a reliable measuring device for tasks like flue gas analysis during commissioning and maintenance of heating systems. The compact natural gas leak detector features a simple user interface and four integrated measurement menus: flue gas, draught, ambient CO & pressure. Thanks to the high-resolution co2 sensor display, all values are visible at a glance and can be configured. You can keep your hands free during measurement by fixing the testo 310 II to metal surfaces using the built-in magnets. Another practical feature: the testo Smart App lets you operate and configure the device remotely. Measurement results can be transferred via Bluetooth to the optional Testo quick printer or sent by e-mail for on-site printing. Technical Details 310 II: Temperature Measuring Range: -4° to 752 °F / -20 to +400 °C Flue Gas O? Measuring Range: 0 to 21 Vol. % Flue Gas Draft Measuring Range: -8 to +8 InH?O / -20 to +20 hPa Pressure Measuring Range: -16 to +16 InH?O / -40 to +40 hPa