A multiparameter meter takes readings of two or more properties on the same sample. Among the parameters it measures are pH, dissolved oxygen (DO), conductivity (also called electro-conductivity or EC), temperature, total dissolved solids (TDS), salinity, resistivity, and oxidation reduction potential (ORP). Most multiparameter meters provide a digital readout on an LCD that may display single or multiple measurements. Electrodes may be used with some meters to test for specific properties or ions in the sample. Certain instruments have automatic temperature compensation (ATC) that accounts for differences in sample temperatures to provide more consistent results. Also known as a multi parameter or multiparameter water quality meter, a multiparameter meter is used by researchers, manufacturers, and hobbyists in aquaculture, agriculture, hydroponics, winemaking, and other water-testing applications.