Function:
WTM-1000 Window Tint Meter measures the total amount of Visual Light Transmission (henceforth referred to as VLT) through a window and any coatings (tint film) on that window.It is a hand held device that measures the 
amount of light that passes through a window.It measures the total amount of Visual Light Transmission 
(henceforth referred to as VLT)through a windo and any coating(tint film)on that window.The device was designed to
measure the total VLT of a window after it has been treated with aftermarket window film.The device slides over a partially rolled down window,does its calculations,and in seconds displays the readings on a LCD.
Because,it has its own internal ight scource,the meter will work day or night

Specification:
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:
   Carrying case    1pc
   Operation manual 1pc 
Optional accessories:
   RS232 Cable and software