Screen and Shield
Thermometer Shed is a special shelter used in tropical regions to house the thermometers. A thermometer shed had been used at the Observatory Headquarters since 1912. A comparison of temperature readings obtained by thermometers housed inside the shed and the Stevenson screen indicated that temperatures recorded at the shed were more representative of the ambient air temperature than those recorded inside the screen. However, due to the bulky size of a thermometer shed, Stevenson Screen is used at the automatic weather stations over Hong Kong.