• Hold the meter up, out of the shade, and record the UV Index, a measure of UV intensity. A sad face will appear on the screen if the intensity is more than 2.
  
• The UV meter will turn off automatically when you take it inside.
  
• The meter has a number of other functions, such as indicating how long you can stay in the sun. Please refer to the attached instruction manual for more details.
  
• A spare set of batteries (CR24-30 lithium) is included in this kit.
  

Do's and Don'ts

Please take care of this expensive piece of equipment.

How it works

• Ultra-violet light is not visible to the human eye. It has a shorter wavelength and more energy than visible light.
  
• As light enters the black sensor on top of the UV meter it is scattered. The light goes through a series of filters (glass and interference filters) that allow only UV light through. The UV light then hits a silicon photodiode which measures the amount of UV radiation.
  
• The digital unit turns the information into various measurements, such as how long a certain skin type can be safely exposed to the sun at that time.