Apella Instruments Economy Type Salt20 Waterproof Pen Type Digital Salinity Meter For applications such as tropical and aquariums pools, fish,

Measurement method: conductivity measurement method, display unit: ppt (1% = 10ppt), perfect for swimming pools and keeping tropical fish The electrodes are equipped with Apella Instruments' unique platinum black plating, which allows for high precision measurements over a wide range. A smiling measurement stability mark notifies you of reading timing on the large LCD screen, and displays the measured value and temperature at the same time. Automatic 1-point calibration, automatic temperature compensation, automatic reading hold, automatic power off Comes with calibration standard solution and a portable hard case, making it convenient for outdoor use.