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Boiler plants
Control emissions. Optimize boiler settings.
The flue gas analyzers testo 340 and testo 350.
Optimize Boiler Performance with the Testo 340 & Testo 350
Ensure cost savings, compliance, and customer retention with reliable combustion & emissions analyzers.
Boiler plants must operate efficiently while complying with increasingly strict emissions regulations. However, monitoring flue gas emissions can be challenging, making it difficult to detect inefficiencies and compliance risks. The Testo 340 combustion analyzer provides real-time, on-site testing to help boiler operators optimize combustion, reduce fuel consumption, and ensure regulatory compliance tuning. The EPA-verified compliance version, testo 350,  has you covered for your NOx compliance testing.
Good for the climate. And for the balance sheet.
Reducing emissions and energy costs
Testo 340 & Testo 350
Why Choose the Testo 340 & Testo 350 for Boiler Applications?
Designed to withstand demanding industrial environments, the Testo 340 and Testo 350 deliver accurate and reliable emissions data for boilers of all types, including water tube, shell, thermal output, and marine boiler systems. Key benefits include:
Precision Gas Analysis – Measure O₂, CO, NOx, for accurate combustion control. Or use Testo’s unique plug & play sensors for more parameters.
Optimize Burner Efficiency – Fine-tune fuel-to-air ratios for maximum performance.
Ensure Regulatory Compliance – Verify adherence to emissions limits and prevent costly fines.
Portable & Versatile – Ideal for commissioning, maintenance, and high-precision emissions testing.
User-Friendly Reporting – Testo easyEmission software simplifies documentation and compliance tracking.
The flue gas analyzers in comparison
testo 340
Efficient service measurements with the testo 340
Self-cleaning effect in the special hose (PTFE): condensate and dirt particles do not adhere
Easy setting: the hose extension (up to 7.8 m) means you can see the boiler display even in measuring locations which are a long way away
No downtimes due to pre-calibrated and exchangeable gas sensors
Measuring range extension (factor 5): unrestricted measurement of high concentrations (CO up to 50,000 ppm)
Always ready to use thanks to robust, low-maintenance technology
testo 350
High-precision emission measurements with the testo 350
Integrated gas preparation for precise (dry) results even in the case of unsupervised long-term measurements
Bluetooth connection allows comfortable work even in the case of long distances (up to 100 m with no obstructions) between the Control Unit and measuring location
Suitable for official emissions measurements (country-dependent)
Measuring range extension (factor 2, 5, 10, 20 or 40 times): unrestricted measurement of high concentrations (CO up to 400,000 ppm with factor 40)
Suitable for use with biogas and the measurement of SOâ‚‚ and Hâ‚‚S
Influencing and measured variables for burner and boiler systems
Generating electricity, heating buildings or producing glass and cement - burner and boiler systems provide the necessary thermal energy. And to ensure that the combustion process runs as economically and environmentally friendly as possible, service technicians have to trim the plant optimally. In our new white paper you will find all relevant topics around flue gas analysis and plant trimming.
Applications for industrial emission analyzers
