Peak Instruments  P-523 Portable Conductivity/DO Meter emits an electrical charge via a conductivity probe, which is dipped into the solution being tested. If there is an increase or decrease in the number of dissolved ions, it will result in an increase or decrease in the electrical charge. Electrical conductivity is measured by conductance between two or four electrodes using amperometric or potentiometric methods. It is used for soil measurements in agriculture, water quality for municipal water supplies, swimming pools, environmental remediation; brewing of wine or beer; manufacturing, healthcare and clinical applications such as blood chemistry; and many other applications.

• Auto recognition of standard pH buffers and there are three kinds of standard buffers for option: USA series, NIST series and China series.