The TESTO 300 LL flue gas analyser with printer (Set 2) is a professional combustion diagnostics tool designed for heating engineers and service technicians who need accurate flue gas measurement and on-site documentation. Built around the rugged and reliable Testo 300 analyser, this kit provides detailed readings of key combustion gases such as oxygen (O₂), carbon monoxide (CO) and calculated carbon dioxide (CO₂), enabling efficient evaluation of burner performance, combustion quality and overall appliance efficiency. The integrated printer allows immediate print-out of results for compliance documentation, customer reporting or service records.

This analyser kit (Set 2) includes the Testo 300 analyser, a flue gas probe and hose, temperature and pressure measurement accessories, and the portable infrared printer. Designed for use on natural gas, LPG and oil-fired boilers and appliances, it supports commissioning, servicing, fault diagnosis and efficiency verification across a wide range of domestic and light commercial heating systems. Because combustion analysis requires safe sampling and interpretation by trained professionals, this tool is intended for use by qualified heating engineers.

Key features of the TESTO 300 LL flue gas analyser with printer (Set 2) include accurate multi-gas measurement and efficiency calculation, rugged handheld design for everyday trade use, comprehensive accessory set for versatile diagnostics, Bluetooth connectivity (where supported) for seamless data handling, integrated portable printer for on-site reporting, and dependable performance that helps technicians verify safe, efficient combustion and produce professional documentation during service and compliance testing.