Description Designed for use in multiple environments, the Fluke 941 light meter is easy to use and provides clear data display for a variety of applications. The Fluke 941 is a handheld luminometer than can measure visible light sent from a variety of light sources, to include fluorescent, metal halide, high pressure sodium, or incandescent lamps. With an extension cord to the light meter and separate display the Fluke 941 provides a handheld tool to accurately measure light in multiple environments. The Fluke 941 is a portable tool that measures light up to 20,000 fc of lux with an accuracy of .01 fc/lux. Applications: Clean room environments, agriculture, HVAC operations Room illumination assessment as part of environmental health and safety reviews Light source quality and troubleshooting   Specifications: Fluke 941 Light Meter Measurement parameter Range 20, 200, 2000, 20000, 200000 Lux 20, 200, 2000, 20000FC (footcandle) Precision ±3% (at 2854°K – calibrated by the common incandescent lamp) ±6% other visible light sources Cosine error 30°±2% 60 °±6 % 80 °±25 % Cosine angle corrected according to the grade A general specifications of JIS C 1609:1993 and CNS 5119 A Specifications Sampling rate: 2.5 times/second for the digital display Display: 3½ digit 1999-point LCD screen Sensor: Silicon photoelectric diode and optical filter Environment: For indoor use Power supply: 9V NEDA 1604, IEC 6LR61 Battery life: 200 hours; in about 6 minutes after auto power-off Dimension (main unit) 130 × 63 × 38 mm Dimension (sensor) 80 × 55 × 29 mm Weight: 220 g (including the battery)