... voltage meter, ampere meter 1) 4 digit ampere meter, voltage meter 2) 4-20mA current meter 3) 0.5% FS voltmeter, ampmeter Digital Voltage meter, Ampere meter, ... , Ampmeter Toky DP3 series 3 1/2 digit voltage meter, ampere meter with following features: 1) Wide display range: +/- 1999, 14 ... Sampling rate: 2.5 times/S, quick response;5) Some model with 4-20mA analog output function (0-20mA can be ...