Hydrosensitive Paper (Spray Indicator Cards) - 10 Sheets - 2" x 4" Intake freeing up floor space and

freeing up floor space and simplifying layout in tight rooms

Give it a 24-hour adjustment period with doors closed each time you move it

Its thin-film composite material delivers consistent results

so nothing is guessed

Prolongs lifespan of downstream filters and membranes

Hydrosensitive Paper (Spray Indicator Cards) - 10 Sheets - 2" x 4" Intake freeing up floor space andHydrosensitive Spray Indicator Cards for Coverage Checks A foliar or IPM spray only works where the droplets land, and the naked eye cannot see a thin, uneven coat until pests survive it. These cards make that coverage visible, turning the yellow paper blue everywhere a droplet hits. Clip a card in the canopy, run the sprayer, and read the blue stain for density, gaps, and drift at a glance. Each sheet is 2 by 4 inches, easy to pin on a leaf, a stake,