Lutron YK-34UV 
UV Light Meter

Features:

• Professional, high quality UV meter.
• Ultra-violet irradiance measurement for UVA & UVB.
• UV detector spectrum from 290 nm to 390 nm.
• Hi, Lo measurement range.
• Two ranges : 1.999 mw/cm2 and 19.99 mw/cm2.
• Exclusive UV sensor structure.
• LSI circuit provides high reliability and durability.
• Separate UV LIGHT probe allows user to measure the UV light at an optimum position.
• LCD display, easy readout.
• Heavy duty & compact housing case.
• DC 9V battery power supply.
• Built-in low battery indicator.