... pressure,weighing,humidity,et DS8-RRRRB Digital Universal Sensor Meter, Sensor IndicatorFeatures:1. Universal input: 4-20mA, 0 ... RS485 or RS232 interface..Applications: DS series multi-function indicator can measure voltage/current signals of any ranges ... holding function; Applied for 2-wire transformer, pressure sensor, 4- wire weighing sensor, remote pressure meter and other sensor measuring devices ...