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  • TPA81 Thermopile Array

The TPA81 is a thermopile array detecting infra-red in the 2um-22um range. This is the wavelength of radiant heat. The Pyro-electric sensors that are used commonly in burglar alarms and to switch on outside lights, detect infra-red in the same waveband. These Pyro-electric sensors can only detect a change in heat levels though - hence they are movement detectors. Although useful in robotics, their applications are limited as they are unable to detect and measure the temperature of a static heat source. Another type of sensor is the thermopile array. These are used in non-contact infra-red thermometers. They have a very wide detection angle or field of view (FOV) of around 100° and need either shrouding or a lens or commonly both to get a more useful FOV of around 12°. Some have a built in lens. More recently sensors with an array of thermopiles, built in electronics and a silicon lens have become available. This is the type used in the TPA81. It has a array of eight thermopiles arranged in a row. The TPA81 can measure the temperature of 8 adjacent points simultaneously. The TPA81 can also control a servo to pan the module and build up a thermal image. The TPA81 can detect a candle flame at a range 2 metres (6ft) and is unaffected by ambient light!

Specfication

  • Voltage - 5v only required
  • Current - 5mA Typ. excluding servo
  • Temperature Range - 4°C - 100°C
  • Accuracy (Full FOV) - +/-2°C +/-2% from 10°C to 100°C,
  • Accuracy (Full FOV) - +/-3°C from 4°C to 10°C
  • Field of View - 41° x 6° (8 pixels of approx. 5° x 6°)
  • Outputs - 1 ambient + 8 pixel temperatures
  • Communication - I2C Interface
  • Servo - Controls servo in 32 steps to 180° rotation
  • Small Size - 31mm x 18mm

TPA81 Thermopile Array

  • Brand: Devantech
  • Product Code: DEVAN-TPA81
  • Reward Points: 50
  • Availability: 9
  • £57.35

  • Ex Tax: £47.79
  • Price in reward points: 600

Contact-less Infrared Thermopile Sensor Breakout - TMP007 [2023]

Contact-less Infrared Thermopile Sensor Breakout - TMP007 [2023]

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The TMP007 is the latest thermopile sensor from TI with an internal math engine doing all the ...

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