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

Starter 300D DO Portable Kit with Case, 20.0 – 45.0 mg/L;0.00 – 19.99;200 – 400%;0 – 50°C, ABS housing, wrist strap, Automatic temperature compensation, adjustable temperature coefficient, Electrodes STTEMP30 (Included); STDO11 (Included). Features: Display: Liquid crystal display (LCD) Operation: 4 AAA batteries (included)

Starter 300C Conductivity Portable, TDS, 00.0 μS/cm – 199.9 mS/cm;0 – 100°C;0.1 mg/L – 199.9 g/L, Convenient Portable pH Meter, ABS housing, wrist strap, Automatic temperature compensation, adjustable temperature coefficient. Features: Applications: Conductivity, total dissolved solids (TDS) measurement Display: Liquid crystal display (LCD) Operation: 4 AAA batteries (included) Design Features: Automatic temperature compensation, adjustable temperature coefficient

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

Starter Pen Meter, Type ORP, -1000 – 1000 mV;0.0 – 99.0 °C, Compact Design for Fast, Convenient Electrochemistry Measurement At Your Fingertips, ABS Housing, Liquid crystal display (LCD) display, 4 1.5V batteries (included) Features: Display: Liquid crystal display (LCD) display with secondary information line (on select models) Design Features: Easily replaceable electrodes, automatic shut off feature