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Barometric pressure, temperature, and humidity sensors are housed in
a powder-coated metal radiation shield.
Barometric pressure is measured with a stable transducer
using nano-technology, yielding a linear and repeatable sensor with low
hysteresis. The piezoresistive pressure sensor module is mounted on a
small electronic circuit board.
A microcontroller controls the operation of the sensor and the data interface.
The microcontroller polls the pressure sensor module once per second for
the barometric and ambient temperature. The raw readings are temperature
corrected by the microcontroller.
Temperature measurement uses a precision triple-element
thermistor. This provides highly accurate and stable readings.
Humidity is measured with a capacitive polymer sensor.
This construction provides excellent resistance to wetting, dust, dirt,
oils, and common environmental chemicals.
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