Feeler gauges, calipers -Rectangle Analog Voltage Ammeter Highlights generic brand Rectangle Analog Voltage Ammeter Description: 50A (75mV), for measuring electric current in DC circuit. Besides being used alone, it is used in the auxiliary panel of low and high voltage switch board, electrical cabinet and control house of transmission and power systems for DC power supply and various electrical drive gears. Accuracy class 2.5 (margin of error = +/- 2.5%). Damping response time: less than 4s. Note: A current shunt resistor must be connected in parallel to the circuit before measurement. Specification: Main Material: Plastic, Copper Wire Circle White Color Size: Approx. 4.3x4.3x3.5cm/1.69x1.69x1.37inch. Package includes: 2 pieces of DC ammeters Note: Please allow 1-3mm error due to manual measurement, make sure you do not mind before you bid. Due to different monitor and light effects, the actual color may be slightly different from the picture color.