Check the listing for details. Battery operated Digital Light Meter Model SLM-110 AW Sperry Instruments. Condition: Used. Listed at 34.99 USD. This battery operated digital light meter, model SLM-110 AW, by Sperry Instruments, is a reliable tool for measuring light and lux levels. It is perfect for professionals in the business and industrial fields, as well as hobbyists who need accurate measurements for their projects. The brand is Digital, and it falls under the category of Test Meters and Detectors, specifically Light and Lux Meters. The device is in excellent working condition, and it comes with a battery included. The compact and portable design makes it easy to carry around and use wherever you need it. The meter has been calibrated to provide accurate readings, ensuring that you get reliable results every time. With this digital light meter, you can measure light levels in a wide range of environments, from dimly lit rooms to bright outdoor spaces.