The HM Handheld TDS Meter is an essential water quality testing device designed for professional window cleaners who rely on accurate readings from their pure water filtration systems. Engineered to measure Total Dissolved Solids (TDS) in parts per million (PPM), this highly accurate digital TDS meter helps ensure your water fed pole window cleaning system is producing the pure water required for streak-free, spot-free cleaning results. Featuring advanced microprocessor technology, a built-in digital thermometer, hold function, and automatic shut-off, the HM Handheld TDS Meter provides fast, reliable readings with a measurement range of 0–9990ppm, making it an invaluable tool for monitoring the performance of reverse osmosis systems, DI vessels, and complete pure water window cleaning setups.