giving you a year and a half of clean

Platinum Sensing Element: High-quality platinum electrode for accurate ORP/redox measurements

Ideal range for Hydroponics (0

"Dramatically improved my commercial cooling tower evaluation times

No Wastewater - Zero water waste during regeneration (because there is none)

Milwaukee T75 Waterproof Low Range TDS Pen - Total Dissolved Solids Meter 0-999 ppm alkaline replacement filter giving you a year andMilwaukee T75 Waterproof Low Range TDS Pen The Milwaukee Instruments T75 is a professional grade waterproof TDS (Total Dissolved Solids) pen designed for accurate low range measurements from 0 to 999 ppm. Built for water quality professionals, aquarium enthusiasts, hydroponics growers, and field technicians who need reliable, portable TDS testing. Key Features Low Range Precision Optimized for 0 999 ppm measurements with 2% full scale accuracy