The A 450 L Basic is a compact and easy-to-use flue gas analyzer that comes with a flexible metal measuring probe. Its ergonomic design makes it easy to use, and it features a touchscreen display. All measurement values are shown on the display during measurement, and you can also configure it to display graphs. It’s a true all-rounder, measuring most parameters—combustion air temperature, pressure differential, flue gas temperature—and calculating CO₂, flue gas loss, excess air, and condensation excess. It features a 3-stage filter system. There are preset codes for different fuel types: pellets, wood, oil, propane, natural gas, coal, and city gas. The A 450 L comes with the following: a water trap filter, 25 cotton filters, and a battery charger. Everything is delivered in a practical and protective carrying case.