IR-8500 850nm Infrared Detection Card/Sensor Card

CAUTION:  To avoid injury, use and wear approved eye protection and observe laser safety when you use this product in conjunction with a laser.   IR-8500 850nm Infrared Detection Card/Sensor Card. Credit Card Size Indicator for Viewing Infrared (IR) Light.  This 850nm Infrared detection card is an excellent tool for any technician or individual working with fiber optic systems that use infrared (IR) light.  Use this card to quickly and visually indicate and see if an IR LED is producing light (radiation) without resorting to the use of bulkier tools.  Each card has an active area (1.5 x 1.5 cm) that is sensitive to IR light.  When illuminated with IR light, the illuminated area produces a blue-green light by dislodging charged molecular electrons in the phosphor material on the card.   To charge the card for use.  The phosphor stores energy when it is exposed to ultraviolet (UV) wavelengths found in sunlight or from fluorescent lamps.  The sensitivity peaks at 800nm and at 1300nm