Yokogawa Electric Corporation 250340NGNG Panel Meter

The Yokogawa 250340NGNG is a panel-mounted analog AC ammeter from the 250 “New Big Look” series that reads 0–20 A and displays current with a needle on an analog dial. Designed for industrial control panels, switchgear, and power distribution systems, it provides a clear visual indication of load conditions for operators and maintenance personnel performing diagnostics or replacing legacy meters. This self-contained unit uses an iron vane mechanism to measure AC current and requires no external current transformer for the 0–20 A range, operating over 25–400 Hz. Its dust-resistant, gasket-sealed housing with magnetic shielding suits tough industrial environments, and the panel-mount design is intended for switchboard installation. Typical accuracy is ±2% of full scale, aligned with Yokogawa's 250-series standards. Common applications include electrical panels, generator systems, and motor control centers where monitoring load is critical for performance and safety. For system replacements, common variants include Yokogawa 250-240-NGNG (same 0–20 A range, different size) and 250-440-NGNG (larger scale version), with other equivalents matched by the 0–20 A range and size.