b) Outdoor sensor
7
8
9
11
7
Wind vane
8
Anemometer (measures the wind speed)
9
Compass point markings (ensures that the wind vane is mounted in the correct position)
10 Connection cable for outdoor sensor
11 Battery compartment
12 L ED indicator (turns on for 4 seconds when batteries are inserted, and flashes every 16 seconds when measure-
ments are sent)
13 Reset button (inset)
14 Temperature/humidity sensor
15 UV sensor
16 Light sensor
17 Rain gauge
18 Spirit level (for horizontal alignment of the outdoor sensor)
40
17
18
13
12
10
16
15
14
12
13