General Description
The MEAS Pi weather shield provides the necessary hardware to
interface the HTU21D digital relative humidity sensor; MS5637 digital
barometric pressure sensor; temperature system sensor (TSYS)01
digital temperature sensor; TSD305-1C55 digital thermopile sensor to
any system that utilizes Raspberry Pi compatible expansion ports
configurable for I
2
C communication.
The HTU21D sensor is a self-contained humidity and temperature
sensor that is fully calibrated during manufacturing. The sensor can
operate from 1.5V to 3.6V, has selectable resolution, low battery
detection, and checksum capability. The HTU21D has a low power
stand-by mode for power-sensitive applications.
The MS5637 sensor is a self-contained pressure and temperature
sensor that is fully calibrated during manufacturing. The sensor can
operate from 1.5V to 3.6V. The sensor module includes a high-linearity
pressure sensor and an ultra-low power 24-bits ΔΣ ADC with internal
factory-calibrated coefficients.
The temperature system sensor -TSYS-01 series is a self-contained
temperature sensor that is fully calibrated during manufacturing. The
sensor can operate from 2.2V to 3.6V. The TSYS01 has a low power
stand-by mode for power-sensitive applications.
The TSD305-1C55 is a contactless temperature measurement system
located in a TO5 package. The TSD includes an infrared sensor
(thermopile) and a sensor signal conditioner.
