Yokogawa Electric Corporation 251-300-HFHF Ammeter

The Yokogawa 251-300-HFHF Analog Ammeter is a panel-mounted AC current meter with a 0–20 A measurement range and an analog needle display that provides immediate visual feedback of load conditions. Designed for electrical measurement systems in industrial equipment, it is commonly installed in switchgear, motor control centers, generator panels, and power distribution systems to monitor current flow in real time. Technical details: Manufacturer Yokogawa; Series 251; Product Type Analog Panel Meter (Ammeter); Model/Part Number 251-300-HFHF; Alternate Part Number 251300HFHF; Input Type Direct current input (CT-dependent if applicable); Display Type Analog needle indicator; Mounting Type Panel-mounted; Construction Industrial-grade housing. Applications and usage notes: It serves as a replacement for failed ammeters, supports panel upgrades, and helps maintain accurate current monitoring in legacy systems, with common deployments in power distribution panels, motor control systems, and industrial machinery.