21 D6T MEMS Thermal Sensors User’s Manual (A284)
7 FAQ
Is it possible to increase the field of view?
Answer
The FOV is set as such due to silicon lens thickness and refractive index
constraints.
Increasing the FOV per pixel would reduce temperature detection performance.
This is another reason why the FOV cannot be increased easily. To measure
temperature over a wider range, you must move the sensor in some way or install
Question
Do signals emitted from infrared ray remote controllers cause the sensor to
operate incorrectly?
The silicon lens used in this sensor allows virtually zero energy within a range of
visible light, having a wavelength of 1.2 μm or less, to infrared rays to pass through.
As such, infrared rays from remote controllers will not cause incorrect operation.
The far-infrared rays that generates radiant heat are between 4 to 14 μm.
Can the sensor distinguish between people, animals, and appliances?
Answer
Thermal Sensors only retrieve temperature data. This temperature data can be
used in user-developed software to distinguish between different objects. The
accuracy of such determinations can be improved by developing software specific
Question
What is the usable detection distance when using this sensor as a human
Answer
This distance depends significantly on the installation conditions and performance
of the determination algorithm used in conjunction with the sensor.
This distance also depends on the FOV area per thermopile sensor pixel and the
size of the intended object. However, in general, this distance would be
Can power consumption be reduced further?
Answer
The D6T series of sensors is not configured with a "operation mode for
power-conserving sleep". As such, the power to the sensor must be shut off to
reduce power consumption.
Can the 3 V drive and slave address be changed?
Answer The D6T series of sensors does not feature such functionality.
Question
How long does it take for the sensor to become fully operational after power is
Answer
Output temperatures will be within the range of temperature accuracy within a few
seconds after power is supplied to the sensor. However, fully stable operation
takes approximately 15 minutes. (Reference value)
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