CEMTEC Gas Sampling System

Measure continuously and reliably in cement kiln inlets

CEMTEC Gas Sampling System

CEMTEC® has self-cleaning properties and unparalleled mechanical strength for continuous measurement for pyro process optimization in cement plants.

The CEMTEC® gas sampling probe system was developed for continuous analysis of flue gas in cement plant rotary kiln inlets and other extremely dusty, high temperature processes such as in lime plants with the goal of increasing product quality with reduced fuel usage while simultaneously reducing harmful emissions.

Particularly in view of the increasing usage of alternative fuels in rotary kilns and large combustion chambers, the on-site gas analysis has become ever more important.
In addition, stringent emission targets in cement plants in Germany, Europe, USA and other countries worldwide necessitate continuous process measurement for SNCR control for NOx  reduction.

Process temperatures up to 1400°C, dust concentrations of up to 2000 g/, high mechanical stress and ambient temperatures up to 50°C make extreme demands on any equipment. CEMTEC® unique features provide an optimal solution for uninterrupted measurement under challenging conditions as found in kiln inlet chambers.

The CEMTEC® is self-cleaning which enables continuous measurement. 95% availability of measurement during operation is reached. In addition to the InSitu sensors for oxygen and COe analysis, extractive analyzers are supplied with dust free flue gas for measurement of e.g. SO2, NOx or CO2.

Cross section: gas inlet CEMTEC® probe tube

Due to its mechanical cleaning, continuous extraction and analysis of process gas is possible over a long period of time: The plunger at the gas inlet removes any deposits or blockages, keeping the gas inlet free. The patented swivel drive continuously rotates the probe in programmable intervals and prevents build up of material on the probe tube, additionally combined with the high power pneumatic motor it retract at any time.

Technical Data
Probe lengths
up to 3350 mm
(others on request)
Measuring ranges
0 - 25 % O2
0 - 500 ppm /
0 - 10000 ppm COe
(others on request)
Sensor accuracy O2
± 0.2 % of O2 measured value
Sensor accuracy COe
±5 % of range end
Gas analysis
InSitu: O2/COe
Extractive: SO2, NOx, CO2
Max. flue gas temperature
1400 °C
Max . dust load
2000 g/m3
Fuel types
Coal, oil, alternative fuels
Probe material
(others on request)
Probe coolant
Probe propulsion
Probe cooling method
Water / water re-cooler
air / water re-cooler
Swivel drive
± 45°
Output signals
2 x 4 - 20 mA
Potential free contacts
Limits and alarms
Cooling water
up to 3000 l/h
(for water / water re-cooler)
Air pressure
7 - 9.5 bar, dry and oil free
Mains voltage
400V 3AC 50-60Hz
700 kg
(dependant on probe length and options)
IP code
  • Cement plants
  • Lime plants
  • High temperature, high dust applications
  • 95 % availability of measurement
  • Swivel drive
  • Automated self cleaning
  • Automatic emergency retraction
  • Optional InSitu O2 / COe analysis
  • Air-Coolant or Water-Coolant probe cooling