The explosion-proof constant potential meter is an indispensable cathodic protection product in impressed current cathodic protection, commonly used as the power supply for impressed current cathodic protection. It features high componentization, lightweight, compact size, various forms (including vertical, desktop, wall-mounted, etc.), easy installation and maintenance, simple operation, energy-saving, high control accuracy, strong anti-interference capability, strong grid adaptability, stable output current and voltage, low power consumption, anti-interference, and long service life.