Overview
The Yokogawa 50-251440LSSN is a precision analog panel meter engineered for AC current measurement. Designed for industrial applications requiring reliable, accurate ammeter monitoring, this window-mount unit delivers consistent performance in control cabinets, electrical distribution panels, and production equipment.
Key Features
- AC current measurement range: 0-5A and 0-800A (dual-range capability with appropriate shunt)
- Wide scales, bold numerals above the scale, and tapered needle-sharp pointers for unobstructed reading
- Window-mount design for easy panel integration
- Polished steel pivots at each end fitting into jewel bearings, recommended for high-vibration environments
- Accuracy and repeatability nearly equal to taut-band meters with long-proven pivot and jewel construction
- Dust and moisture-resistant sealed design
Technical Specifications
- Meter Type: Analog, AC current
- Input Range: 0-5A AC (primary) / 0-800A AC (with external shunt)
- Mounting Style: Window mount
- Case Type: Metal with polycarbonate window
- Suspension: Pivot and jewel
- Meter accuracy comparable to taut-band design with proven durability
- Frequency Range: 60 Hz standard
- Protection: Gasket sealed for dust and moisture resistance
Typical Applications
- Industrial control panel ammeter indication
- Electrical equipment current monitoring
- Production machinery current measurement
- Switchgear and motor control center installations
- Power distribution and load monitoring
- Manufacturing equipment diagnostics
Compatibility & Replacements
Compatible With
- Panel mounting systems with standard cutout sizes
- AC power distribution equipment and control systems
- Electrical switchgear and motor control centers
- Industrial machinery and production equipment
- Building automation and facility management systems
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator or Yokogawa for specific replacement models
- Consult original equipment documentation for applicable alternates
Works With
- External current transformers (CT) for expanded range measurement
- Standard panel-mount shunts for dual-range operation
- AC power measurement systems and monitoring networks
- Industrial control and SCADA systems






