Measurement of UV Intensity
The sensor is located at the red rectangle position. Press keypad "D5" to measure the variation of UV intensity within 10s.
Hints on the use of the UV sensor:
Need enough electricity to give accurate readings. To set proper zero value, you should shield off any light from the sensor and select Calibrate from the lower right menu. It measures the UV-A radiation with wavelength around 280-390 nm. The maximum value is 150 W/m2 and 1 W/m2 = 0.1 mW/cm2.
UV index and exposure level for various UV intensity
| UV intensity (W/m2) |
UV Index |
Exposure level |
0-20 |
0-2 |
Low |
21-35 |
3-5 |
moderate |
36-45 |
6-7 |
High |
46-55 |
8-10 |
Very high |
>=56 |
>=11 |
Extreme |
Source: Hong Kong Observatory (2014) for further information on UV index and health.
