pH Meters & Refractometers

Extech RF20 Portable Salinity Refractometer, Case Included, 0-100 ppt Easy to operate - provides accurate and repeatable measurements on easy to read scale. Requires only 2 or 3 drops of solution. Simple focus adjustment on prism and lens. Includes: Carrying case Calibration screwdriver

Extech EC170 Salinity/Temperature Meter, EC170, Protective Cap, 4x Button Cell Batteries Waterproof meter with automatic temperature compensation. Measures temperature (°F/°C) and salinity (ppt). Features: Meter with salinity sensor Protective sensor cap Four LR44 button batteries

Extech RF11 Portable Sucrose Brix Refractometer, 0-10% Brix Easy to operate - provides accurate and repeatable measurements on easy to read scale. Requires only 2 or 3 drops of solution. Simple focus adjustment on prism and lens. Includes: Carrying case Calibration screwdriver

Extech RF41 Portable Battery Coolant/Glycol Refractometer W/ATC (°C), Case Included Portable Battery Coolant/Glycol Refractometer with ATC (°C). Measures the freezing point of coolants and concentration of Ethylene/Propylene Glycol.