Yokogawa 254350DJDJ9 Analog Frequency Panel Meter

The Yokogawa 254350DJDJ9 Analog Frequency Panel Meter is a compact, panel-mounted AC frequency indicator that uses a 3.5-inch analog dial to display Hz. It draws from a 240 VAC input and shows a typical 45–65 Hz scale, with an accuracy of approximately ±2–3% of full scale for iron-vane or rectifier-type sensors. Part of the 254 Series, this instrument is designed for industrial power systems, including generators, switchgear, motor control, and power distribution equipment, to monitor frequency and support load balancing and system health. The meter features an industrial-grade, dust-resistant housing and is panel-mounted for straightforward retrofit in legacy installations. Common replacements include Yokogawa 254-350-DJDJ and 255-350-DJDJ, underscoring its role in legacy or surplus installations where accurate frequency monitoring remains critical.