Added by on July 9, 2017

Solar Light Company’s SL-3101 SP-meter is a high precision portable illumination meter designed to measure spectral response following the CIE scotopic and photopic action spectra. It uses the S/P ratio to determine lighting levels measuring both scotopic and photopic light levels, providing an accurate measurement of brightness as perceived by the human eye. On board calculations include S-P ratio, visually effective light level, and perceived brightness. This meter has a teflon diffuser, assuring an angular response close to the cosine function.

The kit also includes our intelligent PMA-Series sensors for use with the meter. For photopic measurements, the PMA2130SP Photopic Sensor features a spectral response following the CIE photopic action spectrum. And for scotopic measurements, the PMA2131 has a spectral response following the CIE scotopic action spectrum. Both sensors mount in the included stand as shown.

Applications include: architectural lighting design, lighting efficiency measurements, energy efficiency designing, and scotopic lighting research.

Solar Light Company, Inc. has been recognized worldwide for over 50 years as America’s premier manufacturer of precision ultraviolet light sources, solar simulators, and radiometers. Our standard line of UV, visible, and IR radiometers and light meters measure laboratory, industrial, environmental, and health related light levels with NIST traceable accuracy. Column ozone, aerosol, and water vapor thickness measurements, in addition to long-term global ultraviolet radiation studies all over the world are performed using our atmospheric line of instrumentation. Solar Light also provides NIST traceable spectroradiometric analyses, calibrations for light meters and light sources, accelerated ultraviolet radiation degradation testing of materials, and OEM instrumentation and monitors. Please visit for more details, specifications, and pictures!


Ozone Water


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