BB-1 FRP louvers box seating temperature, humidity instrument and make direct radiation from the sun, while maintaining proper ventilation white louvered wooden box. Role is to prevent the influence of the reflected radiation from the sun radiation and direct the instrument face of the instrument, to protect the instrument against strong winds, rain, snow, etc., and make the instrument sensing part of a proper ventilation, can truly outside air temperature and humidity sensor changes. If installed in a closed box, and there is no way to accurately measure the outside temperature at the time; if you open the case due to the direct rays of the sun would cause temperature, rain, then they will damage the thermometer. During the day, the ability of air to absorb solar radiation is weaker than any of the temperature sensing element; at night, the infrared radiation is also weaker than any of the surface air in a temperature sensing element. Any temperature measuring element is directly exposed to the air, the measurement value is high in the system during the day temperature, night, the system is low. To avoid this error radiation, radiation shielding must take effective measures against temperature measurement devices. Venetian box usually made of two materials, wood and fiberglass, the angle between the two rows of the tank wall and the horizontal blade approximately 45 °, was "human" shape, the bottom is slightly higher in the middle of a three flat, tank top for two flat, upper slightly tilted backwards. Wooden blinds box is divided into two sizes: small blinds inside the box high 537mm, width 460mm, depth 290mm, for the installation of dry bulb and wet bulb, maximum, minimum thermometer, hair hygrometer; large louvered box inside height 612mm, width 460mm, depth 460mm. For mounting thermometer, hygrometer or platinum resistance temperature sensors and humidity capacitance humidity sensor. Wooden blinds box walls made of two layers of thin strips of wood, strips the outer louvers tilted inward, outward sloping inner strip blinds, venetian bars and horizontal angle of 45 degrees. Bottom by three planks, each 110 mm wide, in the middle of a slightly higher than the edge of the two. Cover with two layers. The entire inside and outside thermometer screen is white. The thermometer screen painted white, can be projected on the sun blinds me basically reflected away. Thermometer screen door open north, is to prevent direct sunlight inside observation instruments. Such a structure that has good ventilation louvers box performance, while keeping inside the instrument is not affected by the direct rays of the sun and the rain and snow, in order to protect the representation of the air temperature and humidity observation data. Structure: 1, louvers box by the door and the cabinet composition, the blinds box made of wood, as a whole should be smooth and free of burrs and rust. 2, easy to open in the lock with locking reliable. 3, when the thermometer screen is made of wood, painted surfaces should be waterproof paint. 4, venetian box should be well ventilated and good permeability. 5, the thermometer screen when rain, rain water can not leak into the hundreds of pages inside the box. 6, the thermometer screen in eye days, the light can not radiate directly into hundreds of pages inside the box. 7, with the thermometer screen bracket assembly should be correct, may not have loose, deformation and affect the use of other defects. 8, thermometer screen all parts and components of the protective layer deposited should be firm, uniform, smooth, without delamination, corrosion and other defects. 9, blinds box and mounting bracket should be easy to install, and can guarantee one hundred wind will not affect me but disengaged in normal use. 10, louvers box bracket constituted by the metal base plate should be four mounting holes for easy mounting it to the ground.