VOLTCRAFT DVM330G Digital rack-mount meter 0 - 199.9 mV (can be extended by simply adding resistors)Conrad Electronic€ 20.99*
Joy-it Meter Voltmeter with 3-digit LED display, 3 to 30 volts, 0.36" inch ( 0.914 cm)Conrad Electronic€ 5.49*
ENTES EPM-04C-96 Digital rack-mount meter Voltage, current, frequency, operating hours, Total HoursConrad Electronic€ 139.99*
VOLTCRAFT DVM230W Digital rack-mount meter 0-200mV (can be extended by simply adding resistors)Conrad Electronic€ 14.99*