16 suppliers for calibration light sources are listed in the RP Photonics Buyer's Guide. Both manufacturers and distributors can be registered. These portable photometers are designed with an innovative optical system that offers superior performance in accuracy, repeatability, and the amount of time that it takes to do a measurement. These waterproof meters are extremely user friendly with a tutorial mode that walks the user graphically. For lamp-based testing applications, we offer calibration light sources designed for the optical calibration of spectroradiometers, photometers, and radiometers. Our solutions serve as precision standards for radiant flux and white-light standards for spectral irradiance or luminance. Emulate every part of your data center infrastructure. Use 25+ X-Series. Hand-held, Easy-to-Use UV Light Meter Meter That's Packed with Features The ILT770 is a portable UV meter with built in data storage, a rechargeable lithium ION battery, and easy to read numerical and graphical display, that can display and save readings for easy system analysis and report. We are expert radiometric and photometric problem solvers offering world class manufacturing and material development capabilities. Labsphere's SPF and UPF test.