Testo Slogan
  Home What is Flue Gas Analysis? Testo Solutions Definitions & FAQ’s Calibration & Service Downloads Contact Us  
Applications >> Boilers & Furnaces
  • Flue Gas Analysers for Industrial Engines
  • Flue Gas Analysers for boiler and furnaces
  • Flue Gas Analysers for Turbines
  • incinerators
  • Flue Gas Analyser for Cement Plant
  Boilers & Furnaces
1. Combustion in a Boiler/Furnace
  • A mixture of fuel and air are burned inside the chamber.
  • An excess or extra air is admitted along with the fuel to ensure that every fuel molecule finds sufficient oxygen to combine with, and form carbon dioxide , i.e. to burn completely.
  • Whatever excess air was given in the beginning comes out through the stack, along with the other flue gases. The oxygen concentration in this air is measured, and it tells us whether the combustion is complete and has been efficient.
  • Less than adequate oxygen, measured in the stack, tells us that the fuel doesn’t get sufficient oxygen, and so some of the fuel is left unburnt, and maybe CO is also produced.
  • More than adequate oxygen tells us that whatever heat is produced in the chamber, is taken away by the extra air that is given along with the fuel. This heat loss also means inefficient combustion in a way.
  • For this application, it is always O2, CO, and CO2 that are monitored. O2 tells us the type of combustion, either complete or incomplete. The CO levels tell us how much fine tuning is required for the air to fuel ratio.
  • For this application, for all small boilers, 327 and 330-LL can be offered. And for large power plants, and bigger boilers and furnaces, 340, and 350 are the right solutions. Off course with O2 and CO sensors, CO2 is always calculated.
2. Emission Monitoring in Boilers/Furnaces
  • All liquid, solid, and gas fuels are basically hydrocarbons, and the process of burning them results into production of various air pollutants. Especially uncontrolled combustion produces a high concentration of pollutants. These pollutants damage the environment and are harmful to the population as well as the vegetation.
  • Pollution Control Board has certain norms, and industries have to adhere to such norms and regulate the hazardous emissions, released from their exhausts.
  • It is very important that pollutants like CO, NO, NO2, SO2, HC, H2S, and to some extent, CO2, need to be monitored, so that they can be controlled later.
  • In the combustion exhaust, gases like CO, NO, NO2, SO2, HC are to be measured in the stack, of all burning processes in boilers, furnaces, incinerators, and heaters.
  • testo 340 and testo 350 with 4 and 6 sensors can be used in this application, depending on the no. of gases to be measured, and the other process conditions.
Your direct contact to Testo
Testo India Pvt Ltd
Plot No.: 23, Sind Society, Baner Road, Aundh, Pune - 411007,
Maharashtra, India.
Tel. : +91 20 65600 203
Fax : +91 20 25850 080
Email :
  • facebook
  • linkedin
  • twitter
  • youtube
  • blog
  • blog
Testo India Pvt Ltd
Plot No.: 23, Sind Society, Baner Road, Aundh,
Pune - 411007, Maharashtra, India.
Tel.: +91 20 65600 203    Fax.: +91 20 25850 080