Introduction
MetPak Base Station User Manual
Last Change
©
Gill Instruments Ltd
22 April, 2013
Page 3
1.1.2
Radiation Shield
The Multi-Plate Radiation Shield protects temperature and relative humidity
sensors from error-producing solar radiation and precipitation. This shield relies on
a combination of plate geometry, material and natural ventilation to provide
effective shielding.
1.1.3
Temperature and Relative Humidity Sensor with
Dewpoint Output
The Rotronic HygroClip module is a complete instrument, with integrated
temperature compensation. Calibration data is maintained within the integrated
electronics. It provides digital output signals for Relative Humidity, Temperature
and Dewpoint to the MetPak Base Station Hub box.
Figure 2 Position of Temperature and Relative Humidity Probe in the Radiation Shield
1.1.4
Barometric Pressure
Barometric pressure output is provided by a solid-state device fitted on to the
circuit board in the MetPak Base Station Hub box. Vent to atmosphere is via a
Gortex filter which also protects the pressure sensor from the effects of wind and
rain.
