The Model P53 pH/ORP Analyzer from GLI, of Milwaukee, is a compact, full-featured yet easy-to-use analyzer. It offers benefits usually found in only larger, more expensive analyzers. The Model P53 can accept many different types of pH/ORP sensors: GLI Differential sensors, conventional electrode pairs or standard combination electrodes. Its large backlit LCD displays the measured pH, process temperature and two analog output values. Menu screens contain up to six full lines of text.