Pentair Hypro Water Sensitive Paper Multipacks of 25 & 50 Packs of Cards
Water sensitive spraying cards manufactured in the USA.
Pack of 50 cards sized 26mm x 76mm.
Pack of 25 cards sized 51mm x 76mm
What is water-sensitive paper?
Water-sensitive paper is a rigid paper with a specially coated, yellow surface which will be stained dark blue by aqueous droplets impinging on it. It has been developed for field use in the USA for the quick evaluation of LV sprays. For droplet assessment aqueous sprays no longer need the addition of dye. Just place the papers in the target area before spraying. Following exposure to the spray the water-sensitive papers will be stained. Retrieve the papers as soon as they have become dry. Check the droplet pattern. For a quick estimate compare the exposed collectors with a known standard or count the droplets either using a hand lens or an automatic image analyzer.
WSP is senstive to moisture in the air and on your hands. Wear waterproof gloves, handle the paper only by the edges and do not use WSP where any surface is wet.