Experience precision with the Martindale Electric Proving Unit PD690, a robust solution for various electrical testing needs. Designed with ease of use in mind, this unit offers reliable performance for professionals in the test, measurement, and inspection industries. Crafted by the reputable brand Martindale, this proving unit is an essential tool for ensuring the integrity of electrical systems. Its versatile design allows for a wide range of applications, making it a valuable addition to any technical toolkit.