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Non-contact infrared sensors from Micro-Epsilon are being used to monitor the temperature of steel strip on an experimental small-scale rolling mill at the Corus Swinden Technology Centre.

The rolling mill, which is approximately one-eighth the size of a conventional full size rolling mill, will incorporate four infrared temperature sensors to measure temperatures at various positions along the process line.

The rolling mill will enable Corus to make better, more informed decisions with respect to cooling methods for different steel strip products.

This includes the simulation of different cooling techniques for various types and grades of steel.

Four Micro-Epsilon Thermometer CTM2 temperature sensors will be placed at various points in the rolling and cooling process.

Two of these sensors are already in position and have been used to measure temperatures on the high-temperature rolling side.

The other two sensors will be located on the cooling conveyor, one at the start and another low-temperature version of the sensor at the end of the cooling system.

The process temperatures on the rolling side vary from 850C up to 1,100C, while temperatures on the cooling side are down to 600C.

The sensors located on the rolling mill housing are positioned so that they point straight down into the centre of a steel block from a distance of around 400mm.

’The scale model rolling mill is being developed to test different cooling regimes for the steel strip products,’ said Garry Beard, development engineer at Corus Swinden Technology Centre.

’In early 2009, we decided that we needed some new non-contact temperature sensors on the rolling mill.

’These sensors needed to be small, robust and accurate.

’At the time, we were using temperature sensors that were relatively large in comparison to the Micro-Epsilon ones.

’We also wanted dedicated sensors that we could fix to the rolling mill,’ he added.

After evaluating Micro-Epsilon’s range of non-contact infrared temperature sensors, Beard selected the Thermometer CTM2 version.

’The compact size, accuracy and repeatability of the sensors swayed our decision,’ he said.

’Micro-Epsilon was able to supply a trial sensor so our engineers could try it out on the rolling mill.

’We were also provided with an on-site demonstration of the sensor and technical support from Micro-Epsilon,’ he added.

Temperature measurement data collected by the four temperature sensors is fed into the rolling mill’s software program where it is used to model and simulate the different cooling methods for the steel strip.

’The sensors on the rolling stand have been installed for more than eight months now and are performing without any problems,’ said Beard.

’As soon as our instrumentation team set up the sensors and controllers, it all seemed to work very well, with data being fed from the Micro-Epsilon controller to our own data logger.

’We have now ordered four similar sensors for use in plant process monitoring,’ he added.

Micro-Epsilon’s Thermometer CTM2 range of infrared temperature sensors measure process temperatures from 250C up to 1,600C and are suitable for use with metals, metal oxides, ceramics and composites.

The sensors offer double precision laser sighting and a 40:1 or 75:1 optical resolution.

Sensor response times are from 1ms.

The sensor weighs 40g and the controller 420g.

The Thermometer CT laser M1/M2 can be used in ambient temperatures up to 100C without cooling and has an automatic laser switch off at 50C.

The sensor measures at very short wavelengths (1-1.6um), which minimises temperature measurement errors on surfaces with either low or unknown emissivity.

A range of accessories and optional extras are available for the CTM1/M2 range to protect the sensor in harsh operating environments.

These include air-purging accessories, K- or J-type thermocouples outputs and a range of integrated digital communications interfaces, including Profibus DP, CAN open, USB, RS232, RS485 and Ethernet.


With over 45 years experience and more than 15,000 customers worldwide, Micro-Epsilon understands the need for accurate, robust, intelligent sensors and measurement systems.

With over 45 years experience and more than 15,000 customers worldwide, Micro-Epsilon understands the need for accurate, robust, intelligent sensors and measurement systems.

If you are measuring any type of displacement / position, temperature, speed or colour parameters, Micro-Epsilon sensors and systems provide market-leading performance, together with the fastest measuring rates, highest operating temperature ranges and smart interface capabilities. From simple, low cost sensors to high volume, customer-specific OEM solutions, Micro-Epsilon will have athe correct measurement solution for your application.

Using both contact and non-contact measurement techniques, Micro-Epsilon boasts one of the largest ranges of displacement sensors including 1D, 2D & 3D laser optical, confocal chromatic, eddy current, capacitive, inductive, draw-wire and time-of-flight technologies. Measuring ranges are from nanometers to kilometers!

For temperature measurement, there is a comprehensive range of non-contact infrared temperature sensors and thermal imaging cameras capable of measuring up to that include intelligent software packages to support configuration, analysis and management during the application. LED analysers, fibre optic sensors and Colour recognition sensors measure true colour using L*A*B and CIE.

Micro-Epsilon sensors are used throughout almost all industries: from automotive to aerospace, motorsport to metal production, semiconductor to subsea. Whether it’s an R&D, test, inspection, OEM or a process control application, Micro Epsilon measurement engineers can provide the right measurement solution.

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