Applications:   Whiteness Meter is mainly used to directly measure the whiteness value of object or powder with flat surface.  Can be widely used in whiteness measurement of textile printing and dyeing, paint, chemical building materials, paper board, plastic products, white cement, ceramics, enamel, talc powder, starch, flour, salt, detergent, cosmetics and other substances.  * It consists of Light Source, Optical System, Detection System, Data Process and Display System. The whiteness Calculation Formula of the instrument is blue light whiteness R457.  * Use of high quality imported components, good reliability.  * The optical path design is reasonable, simple. Adopt filter system with correction, the whiteness can be reflected quantitatively.   * No preheating after starting, measurements can be taken after simple calibration, easy to operate.   * Pass strict inspection and testing, the instrument conforms to the JJG 512-2002 Whiteness Meter Verification Regulation. Also conforms to GB3978, GB3979, GB7973, GB7974, ISO2470, GB8904.2, QB1840, GB2913, GB13025.2, GB1543, ISO2471, GB10339, GB5950, GB12911, GB2409 and other standards.   * Able to memory 254 groups of measurement data.   * Use USB data out put and RS- 232 data out put to connect with PC.   * Provide BT data out put choice.               Range         0~120               Resolution         0.1               Illumination condition         45/0               Illuminant         LED 457 nm               Whiteness Formula         Blue Light Whiteness WB=R457               Measuring Aperture         18x11 mm Rectangle               Zero Drift         ≤0.1               Stability of Display         ≤0.5               Repeatability of Measurement         ≤0.1               Operating Condition         Temperature         0~40& 8451;               Humidity         <85 %RH               Power Supply         Lithium Battery               Size         140x45x75 mm               Weight         305 g (Including Batteries)                Standard Accessories :      1. Main Unit   2. AC Adaptor   3. Standard White Board    4. Optical Cleaning Cotton Cloth   5. Carrying Case   6.