Range: 0-9990 ppm Dual Range – Measures from 0-999 ppm

Note: MA840 probe

Use only Alexapure Pro Genuine Replacement Filters to ensure the highest quality results

It uses the SE220 double junction

User Manual

NuvoH2O Evaporative Cooler Scale Preventer Puck — 3-Month Limescale Protection for Swamp Coolers Series IV filter Range: 0-9990 ppm Dual RangeNuvoH2O Evaporative Cooler Scale Preventer Puck 3 Month Limescale Protection Hard water limescale is the #1 enemy of evaporative coolers (swamp coolers). Scale accumulates on the water pan, pump, pads, and distribution tubes with every cooling cycle reducing efficiency, restricting water flow, and causing premature component failure. The NuvoH2O Evaporative Cooler Scale Preventer Puck stops this damage with a dual action citrus + polyphosphate formula