Digital Luxmeter, economical solution for light measurements in a learning situations, the autoranging feature makes a one-button-and-done instrument, auto power-off conserves battery power, and other functions include MAX, MIN, and HOLD, Requires a 9V battery (not included)
Premium red and green laser pointer. Green laser range is 6000 ft at 532nm wavelength. Red laser range is 1500 ft at 650nm. Perfect for small and large meeting rooms. FDA Class IIIA Compliant. Size is 5/8in x 6 1/8in. 2 AAA batteries
Sodium light source, 20W low pressure discharge lamps for spectral work. Delivers approximately 350 lux at 20 cm and more than 90% of the light is concentrated in the doublet at 588.9/589.5 nm. Faint lines of the mercury spectrum are also visible.
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