Model WD21 weighing indicator is a kind of general wighing indicator, which adopt excellent AD IC (the conversion speed > 50/s). It has internal 60,000 counts of resolution and many benefits such as easy to use, high precision, stability, credibility, zero balance adjustment and wide input signal range, upper and lower limit setting and alarm, peak test (option). The indicator can be easily implimented into different kinds of electronic scales which are built up from load cells, such as platform scales, ground scales, vehicle scales, and oil scales.