Sensor type: Silicon Photodiode (connected to meter)

Saltwater & Reef Aquariums: Monitor salinity levels in FOWLR (Fish Only With Live Rock) and reef tanks to maintain optimal conditions

easy to handle during extended use

EC electrode: MA812/2 (included)

The clear sump lets you visually monitor filter condition at a glance

Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS) SE220 Sensor type: Silicon Photodiode (connectedDIGITAL. SIMPLE. COMPACT. The Milwaukee CD600 Total Dissolved Solids (TDS) Pen is designed for hydroponics, aquariums, horticulture, water conditioning and many other applications. The CD600 helps you make sure that your plants are receiving the right amount of nutrient or helps you keep your filters up to date and clean for water filtration. Keep TDS in your target range to help your achieve better results. DESIGN FEATURES Measures Total Disolved