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By certification 
Applications:
It measures the total amount of Visual Light Transmission (henceforth referred to as VLT) through a window and any coatings (tint film) on that window.
Specifications：
Disply: 10mm LCD
Accuracy: 0.1
Wavelength: 550 Nanometers
Measurement Range: 0 to 100% Light Transmission
Interface: RS232C
Sample Thickness: Less than 10 mm/0.4inch
Sample Size: 50 x 50 mm Minimum
Time of Testing: Maximum of 4 Seconds
Effects From Stray Light: Not Effected by Stray Light
Lamp Life: 10 Years
Operating conditions: 0-50℃,<90%RH
Power Source: 4 x 1.5v AAA Batteries
Weight: 100g (not including batteries)
Dimensions: 126 x 65 x 27 mm(5.0 x 2.6 x 1.1 inch)
Standard accessories included :
Carrying case 1 pc.
Operation manual 1 pc.
Optional accessory: Cable and software for RS232C
It measures the total amount of Visual Light Transmission (henceforth referred to as VLT) through a window and any coatings (tint film) on that window.
Specifications：
Disply: 10mm LCD
Accuracy: 0.1
Wavelength: 550 Nanometers
Measurement Range: 0 to 100% Light Transmission
Interface: RS232C
Sample Thickness: Less than 10 mm/0.4inch
Sample Size: 50 x 50 mm Minimum
Time of Testing: Maximum of 4 Seconds
Effects From Stray Light: Not Effected by Stray Light
Lamp Life: 10 Years
Operating conditions: 0-50℃,<90%RH
Power Source: 4 x 1.5v AAA Batteries
Weight: 100g (not including batteries)
Dimensions: 126 x 65 x 27 mm(5.0 x 2.6 x 1.1 inch)
Standard accessories included :
Carrying case 1 pc.
Operation manual 1 pc.
Optional accessory: Cable and software for RS232C
