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Devantech TPA81 Thermopile Array Sensor

The TPA81 from Devantech is a thermopile array sensor which detects infrared in the 2um-22um range. This is the wavelength of radiant heat, therefore the TPA81 is unaffected by ambient light.

The TPA81 can detect a candle flame at a range of 2 metres.

It has an array of eight thermopile sensors arranged in a row. The TPA81 can measure the temperature of 8 adjacent points simultaneously. The module can also control a servo to pan itself around and build up a thermal image.

Communication with the TPA81 module is via the I2C bus. This is available on popular controllers such as the BASIC Stamp BS2P, as well as a wide variety of microcontrollers. I2C communications with a PIC Microcontroller may easily be implemented using the PicBasic Pro compiler.


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Technical Details

Voltage 5V
Current 5mA typical without servo
Temperature Range 4C - 100C
Accuracy
(full FOV)
+/-3C from 4C to 10C
+/-2C +/-2% from 10C to 100C
Field of View 41 x 6 (8 pixels of approximately 5 x 6)
Outputs 1 ambient + 8 pixel temperatures
Communication I2C interface
Servo Controls servo in 32 steps to 180 rotation
Dimensions 31mm x 18mm

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Page Updated:
17/03/2020

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Warburton Technology (UK), 33 Selkirk Close, Wimborne, Dorset, BH21 1TN, United Kingdom
VAT Number: GB 846 917 877