TPA81 Thermopile Array Sensor
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The TPA81 is a thermopile array 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 or
PicBasic Pro compilers.
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Technical Data
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| Voltage |
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5V |
| Current |
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5mA typical without servo |
| Temperature Range |
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4°C - 100°C |
Accuracy
(full FOV) |
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+/-3°C from 4°C to 10°C
+/-2°C +/-2% from 10°C to 100°C |
| Field of View |
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41° x 6° (8 pixels of approximately 5°
x 6°) |
| Outputs |
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1 ambient + 8 pixel temperatures |
| Communication |
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I2C interface |
| Servo |
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Controls servo in 32 steps to 180° rotation |
| Dimensions |
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31mm x 18mm |
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16x2 Serial LCD
