An attractive design for industrial or commercial applications, the Century offers maximum reliability, and is accurate to ±2% of full scale (F.S.) on all readings. The Century offers an iron-vane movement that allows the instrument to be mounted on steel panels. Models are available to measure various current ranges up to 300 amps and are calibrated for a frequency range of 25-800Hz. These easy-to-read meters, molded in a black phenolic housing with a large glass viewing window, come in three different sizes of 2-1/2", 3-1/2" and 4-1/2". The 2-1/2" meters are self-contained through 50 amps and the 3-1/2" and 4-1/2" meters are self contained through 75 amps. Higher range readings require an external transformer. Dual range scales can be ordered for the 4-1/2" meter as well as custom dials to fit your specific application. This style meter is ideal for many other electrical functions.