HOMS COMPONENT

DOUBLE-LOUVERED THERMOMETER SCREEN

1.   Purpose and objectives

     To protect thermometers from solar radiation and to shelter them from precipitation, while allowing the free circulation of air.

2.   Description

     The screen has a single door. The walls are double-louvered and the floor is made of staggered boards. The roof is double layered, with provision for ventilation of the space between the two layers. The screen is painted white inside and out, and stands 1.80 m high. Drawings are provided for both small and medium-sized screens.

3.   Input

     Not applicable.

4.   Output

     As in (1) above.

5.   Operational requirements and restrictions

     The screen should be placed so that the sun does not shine on the thermometers when the door is open at the times of observation. It should be installed in such a position as to ensure that the measurements are representative of the free air circulating in the locality and not influenced by artificial conditions such as large buildings and expanses of concrete.

6.   Form of presentation

     Constructional drawings.

7.   Operational experience

     The thermometer screen has been manufactured by the Thai Meteorological Department and successfully used in Thailand.

8.   Originator and technical support

     Instrument Repair and Accessories Manufacture Section, Thai Meteorological Department.

9.   Availability

     From the HOMS National Reference Centre for Thailand.

10.  Conditions on use

     The component is available at the cost of reproduction and mailing.