The zirconium-oxide measuring principle is used for O2 measurements in especially combustion processes for use of control and optimisation of the process. The zirconium oxide probe has a platinium-coated ceramic measuring element that c ...
The LaserGas measuring principle TDLAS (Tuneable Diode Laser) is a comparatively new measuring principle. It is used for in-situ measurements of for instance O2, CO2, CH4, H2S, H2O, HCl, HF and NH3 gasses. The LaserGas instruments are often used for ...
Paramagnetic
Some gasses such as O2 have paramagnetic characteristics due to non-paired electrons. This feature can be used by letting the gas pass through a magnetic field in a gas analyse ...
Electrochemical The electrochemical measuring principle is often used for measurement of O2 in extractive gas analysis systems. However, it can also be used for measurement of CO, NO and SO2 from small transportable gas analyser systems. The measu ...
Many gasses absorb infra red light extremely well, which makes the use of infra red light (IR) very useful for the analysis of many gasses such as CO, CO2, NO, SO2 and CH4.
One of the IR measuring principles is the NDIR (Non Dispersive Infra Red) p ...
Ultra violet light (UV and NDUV)
Ultra violet (UV) light is often used for the analysis of NO, NO2 and SO2. Often, when the UV measuring principle is used it is actually the NDUV (Non Dispersive Ultra Violet) principle. The measurement is made by ...
The FTIR measuring principle is a measurement with IR light. Contrary to NDIR with a narrow wave length area by means of an optical filter, the scan area of the IR wave length by use of the FTIR measuring principle is large. The principle of FTIR is ...
Chemiluminescense (CLD)
The chemilumiscense, CLD, measuring principle is used for analysis of NOx. The principle is that a gas flow is led through a reaction chamber in which NO reacts with O3 (ozone). The NO2 produced from this process reaches an e ...
For some applications it is desirable, often for economic reasons, to measure NOx by means of an NO gas analyser in combination with an NO2 to NO converter.
The principle of the converter is that the gas passes through the heated catalyst material ...
Flame Ionisation (FID)
The flame ionisation measuring principle (FID) is used for analysis of hydro carbons, also called TOC and UHC. The analysis of TOC with the FID measuring principle is done by leading the gas into a combustion chamber where t ...
Dust Measurement, Optical
Optical dust measuring is often made with an in-situ dust meter to be mounted directly onto the flue gas duct. The dust concentration in the process is either measured by transmission (converted to opacity), absorption or ...
Dust measurement with a radio-active source (beta source with non-damaging health risks from radio-active radiation) is made using an extractive dust meter in which a sub-flow is taken out from the process and irradiated with a be ...
Dust Measurement, Tribo-electric
The principle of tribo-electric dust measurement is that whenever a dust particle hits an electrically loaded metal stick, which has been placed across a flue gas duct, the charge of the metal stick is changed. The ...
Flow Measurement, Differential Pressure
Flow measurement by differential pressure is based on the pressure in the flue gas duct. The probe has two separate chambers, which causes a difference in pressure caused by the flow in the ducts. The differ ...
Flow Measurement, Ultra Sound
Flow measurement in the flue gas using the ultra sound measuring principle has become more common during the last 5 to 10 years. When the flue gas flow is measured by ultra sound, a sender and receiver unit, both with ...