uxcell DMiotech Instrument 85C17 DC 0-50A Analog Panel Meter Ammeter Gauge Tester Made of good quality plastic material and finished by good technology. Measures current range of DC 0-50A with accuracy of Class 2.5. Suitable for communication, broadcasting equipments and electronic instruments, etc. Clear and easy to read scale with analogue display and a button for fine tuning the dial. Please Note: a 50A 75mV Current Shunt resistor should be connected in paralell to the circuit before measuring