This is an external temperature and humidity sensor designed to be shielded from transient solar radiation and radiant heat from the payload box.
This sensor includes a TMP100 Temperature Sensor and an HIH-4030 Humidity Sensor. Also included are pads for a Micrel 5205 voltage regulator, and a P82B96 I2C extender chip. With solder jumpers, this part can be configured to operate near the main I2C bus of the payload box (Less than 30 cm) or far (Up to 15 meters).
Humidity sensor analog output is 0-3.3v