Infrared Sensors


The Smartec SMTIR99XX infrared sensors are sophisticated devices containing silicon infrared sensors and thermopiles. Thermopiles are structures composed of thermocouple junctions and convert thermal energy into electrical energy. The application of thin film technology allows the production of miniaturized and low cost sensor elements. For specialized applications, there is a version with a small opening angle of 7°.

Smartec SMTIR99XX infrared sensor

The sensors can be used in measuring radiation temperature without any contact. For different radiation temperature ranges, various filters are available. The sensor type SMTIR9902 contains a temperature sensor for measuring the temperature of the sensor itself. The temperature range of the sensor-element is between -40 to 100 °C. The sensor is available in a standard TO-5 encapsulation and comes equipped with a 5.5 micrometer filter. For a small field of view, there is an infrared sensor available with a silicon lens.

Most Important Features

  • High accuracy
  • High sensitivity (110 V/W)
  • Low resistance (50 kohm) and therefor
  • Very good signal-to-noise-ratio
  • Good response time (40 ms)
  • Low cost thin film technology
  • Easy and accurate measuring of the sensor temperature by means of a built-in temperature sensor (SMTIR9902)

Typical Applications

  • Contactless measurement of surface temperatures or Infrared radiation
  • Temperature measurement on moving objects
  • Continuous temperature control of industrial sites
  • Thermal alarm systems
  • Climate control
  • Medical instruments
  • Home appliances

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