Digital Multi-Meter

You need to know what Amps your system is drawing.
This little meter will tell you what amps your electrolyzer is pulling.

Reads DC voltage, DC current, AC voltage, resistance, transistor test, diode test, and battery test. Easy-to-read 3-1/2 digit LCD readout, positive set selector switch, and 32" leads. Automatic zero adjust Overange indicator 2.5x second sample time Low battery indicator Fuse and diode protected circuit DC-A: 0-200µ; A-2000µ; A-20mA-200mA ; Resistance: 0-200-2000-20K-200K-2000K ohm; DC-V: 0-200mV-2000mV-20V-200V-1000V ; AC-V: 0-200-750V