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Micro-Epsilon has extended its range of non-contact temperature sensors to include a compact infrared ratio temperature sensor suitable for use in high-speed, high-temperature environments, including those found in metal casting, welding, forming and sintering.

The Thermometer CTratioM1 two-colour sensor measures temperatures from 700ºC up to 1,800ºC. The device can operate in ambient temperatures up to 250ºC without requiring any cooling.

The sensor is insensitive to dust, smoke fumes and steam. Using the ratiometric measuring principle, the device minimises measurement errors caused by laser intensity changes, low emissivity and partial spot size coverage. Even in cases where the infrared radiation beam is weakened to 95 per cent of its original intensity due to smoke or steam, the ratio pyrometer provides faultless, reliable measurements, according to the company.

The Thermometer CTratioM1 is said to be particularly suitable for measuring high temperatures on metals and for monitoring fast-moving production processes. It is designed for companies that need to measure the temperature of metals, metal oxides, ceramic or semiconductor materials in harsh environments.

Key features and specifications

  • Compact and rugged sensor head
  • Optical resolution of 40:1
  • Fast response time of 5msec
  • Short wavelength range of 0.7 to 1.1µm
  • Selectable focus combined with built-in laser aiming
  • Two integrated infrared detection channels with relatively close spacing but with mutually different measuring wavelengths
  • Fibre-optic cable for connecting the optical sensor head to the electronics
  • Optional integrated Profibus DP, USB, RS232, RS485, CANbus or Ethernet interfaces


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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