Overview
The Simpson MR36W500DCMAR 25R is a rugged analog panel meter designed for direct measurement of DC current in the 0–500 milliamperes range. As part of Simpson Electric’s Model 25R series, this instrument combines decades of metering expertise with straightforward mechanical design. The Simpson MR36W500DCMAR is ideal for monitoring DC current flow in industrial control circuits, battery systems, power supplies, and test benches where reliable, unpowered measurement is essential.
Key Features
- 0–500 mA DC measurement range with linear scale
- No external power required — operates as a passive current-sensing element
- Model 25R chassis design — compact 36 mm face format for panel integration
- Durable mechanical movement suitable for harsh industrial environments
- Direct series connection for accurate, real-time current monitoring
Technical Specifications
- Measurement Type: DC Milliamperes (mA)
- Range: 0–500 mA
- Model: 25R (MR36W500DCMAR)
- Face Diameter: 36 mm
- Configuration: Analog meter movement, passive (no power input)
- Connection: Series connection (in-line with circuit)
- Scale Type: Linear DC scale
Typical Applications
- DC circuit monitoring and diagnostics
- Battery charging and discharge current measurement
- Power supply and regulator output monitoring
- Industrial control panel current indication
- Test and service bench equipment
- Motor and coil current verification
Compatibility & Replacements
Compatible With
- DC power supplies (0–500 mA range)
- Industrial battery systems
- Control circuits and relay circuits
- Any DC circuit requiring 0–500 mA monitoring
- Standard panel mount enclosures with 36 mm round openings
Replaces / Drop-In Replacement For
- Other Simpson Model 25R milliammeter models in equivalent ranges
- OEM replacement for legacy Simpson MR36W panels
- Verify exact circuit impedance compatibility with your system integrator before ordering
Works With
- Any analog panel mount system using 36 mm round openings
- DC metering circuits without data acquisition requirements
- Standalone instruments and test equipment





