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The Extech Instruments HD450 Heavy Duty Datalogging Light Meter is a light meter with double molded housing and large backlit display with 40-segment bar graph.

Features: 

• Automatically stores up to 16,000 readings or manually store/recall up to 99 readings
• Large backlit LCD display with 40-segment bar graph
• Wide range to 40,000Fc or 400,000 Lux
• Cosine and color corrected measurements
• Utilizes precision silicon photo diode and spectral response filter
• Peak mode (10mS) captures highest reading
• Relative mode indicates change in light levels
• Min/Max and Data Hold
• Backlight for readings in low light levels
• Heavy Duty rugged double molded housing
• Built-in USB port

Specifications: 

• Fc Range 40, 400, 4000, 40.00kFc
• Lux Range 400, 4000, 40k, 400k
• Lux Accuracy ±5% rdg
• Max Resolution 0.01Fc/0.1Lux
• Datalogging (HD450) 16,000 continuous readings; 99 selected readings
• PC interface USB
• Dimensions 6.7 x 3.1 x 1.6” (170 x 80 x 40mm)
• Weight 13.7oz (390g)