Overview
The Simpson 15125 panel meter is a laboratory-grade analog ammeter housed in the compact Model 554 package. This 0-25 AC amperes meter delivers direct, mechanical current measurement without digital electronics, making it ideal for OEM panel mounting, test benches, and process control feedback. Simpson’s reputation for accuracy and durability ensures reliable performance in demanding industrial environments.
Key Features
- Precision AC current measurement (0–25 amperes full scale)
- Rugged high-density plastic enclosure with protective glass window
- Compact 4.5″ form factor suitable for panel integration
- Iron-vane AC movement for stable, accurate readings
- UL recognized for safety compliance
- No external power required—direct current sensing
Technical Specifications
| Measurement Range | 0–25 AC amperes |
| Model | 554 (Designer Series) |
| Catalog Number | 15125 |
| Movement Type | Iron-vane AC |
| Internal Impedance | Approximately 0.002 ohms |
| Display Size | 4.5″ |
| Weight | 6 oz |
| Enclosure | High-density black plastic case |
| Window | Glass |
| UL Recognition | Yes |
Typical Applications
- Motor current monitoring in industrial automation
- OEM equipment panel instrumentation
- Process control and test equipment
- Load monitoring and diagnostic systems
- Educational and laboratory demonstrations
- Maintenance technician current verification
Compatibility & Replacements
Compatible With
- Standard AC power circuits (50/60 Hz)
- Industrial control panels and enclosures
- Current transformer outputs (for higher amperage ranges)
- Direct panel-mount applications requiring mechanical feedback
Replaces / Drop-In Replacement For
- Simpson Model 554 units in other amperage ranges (cross-reference by catalog number)
- Similar-sized 4.5″ analog AC ammeters from competing manufacturers
- Verify exact mounting dimensions and terminal configuration with your system integrator
Works With
- Standard DIN rail or wall-mounted control enclosures
- AC power distribution systems (single and three-phase)
- Current sensing circuits and analog monitoring systems
- Any application requiring direct mechanical AC ampere indication
