Description This UV Sensor Card is a reusable card and can measure ultraviolet (UV) radiation accurately in 10 seconds. Hold the card under the UV lamp at the basking site (within 5cm distance to the lamp) to check if the lamp is available or not. “Purple” light will be shown on the card under the UV lamp, and means the lamp is a available. Replace the bulb annually or sooner if the card doesn’t show any color, card can be used up to 500 times when used in 10-seconds increments. Card changes colors from White to Purple based on the UVB & UVA ray strength. 2PCS Durable plastic card, credit card size, 3.4 inch x 2.1 inch comes in a sleeve. Do not leave in direct sunlight. Put back in sleeve when done using.
