• 30 lux light rating
• 40 ft length sensor
• 1 in x 4 in mounting bracket
• Splash-proof with gasket environment

Weiss instruments is the patent holder #5196781, which features a no battery design and reliable readings in very low light applications. The LCD (Liquid Crystal Display) is bold and easy to read. The extra benefit of these units is that being "self - powered" they need no power line or batteries to operate and therefore no need for periodic maintenance.