Core Purpose
Block Direct Sunlight: Keeping the instruments in the shade prevents the sun from heating the sensors directly, which would result in falsely high temperature readings.
Prevent Radiation Errors: It shields instruments from ground-reflected heat and nighttime cooling effects.
Weather Protection: It guards sensitive tools from rain, snow, and heavy winds.
Allow Natural Airflow: The screen ensures that the instruments are measuring the true, ambient temperature of the surrounding air rather than localized trapped heat.
Key Design Features
Louvered (Slatted) Sides: The angled slats block precipitation and direct rays but allow outside air to circulate completely freely.
White Paint: The shelter is strictly painted white to reflect as much solar radiation away from the box as possible.
Double Roof: A gap between the inner and outer roof adds a buffer zone of air to stop overhead solar heat from penetrating the enclosure.
Instruments Housed Inside
Psychrometer: A tool consisting of a dry-bulb and a wet-bulb thermometer to measure the exact relative humidity of the air.
Thermograph: A continuous recording device that automatically traces a real-time temperature curve onto a rotating graph paper drum.
Thermometers: Standard maximum and minimum thermometers used to capture the absolute highest and lowest temperatures of the day.