Labnics Whiteness Meter using the photoelectric effect principle, measures whiteness with a blue light R457 formula and a long-life 457 nm LED display. Featuring high-quality imported components and a streamlined optical path, it requires no pre-heating and provides instant readings. Easy to operate with simple calibration, it stores up to 254 data groups and connects to PCs via RS-232 or Bluetooth. This device ensures precise, reliable results and passes stringent testing and inspection.