OTC Tools 3505A Auto-Ranging Automotive Multimeter with RPM and Temperature

The OTC Tools 3505A is a professional-grade digital automotive multimeter designed specifically for automotive diagnostics and troubleshooting. This auto-ranging multimeter combines traditional multimeter functions with specialized automotive testing capabilities, making it an essential tool for technicians and serious DIY mechanics.

Comprehensive Measurement Capabilities:

• AC/DC voltage measurement: 400mV to 600V range
• AC/DC current measurement: 40mA to 10A range with fused protection
• Resistance: 400Ω to 40MΩ range
• Capacitance: 40nF to 4000μF range
• Frequency measurement: 1Hz to 10MHz
• Temperature range: -58°F to 752°F
• Continuity and diode testing

Automotive-Specific Test Functions:

• RPM measurement: 0 to 10,000 RPM with ±0.5% accuracy using included inductive clamp
• DWELL angle measurement for ignition system diagnostics
• Millisecond pulse width measurement for fuel injector testing
• Peak voltage capture: 4V to 400V at ±5% accuracy
• Duty cycle measurement: 0.1% to 99.9% at ±2% accuracy
• O2 sensor cross count: 0 to 500Hz at ±0.5% accuracy

Advanced Features:

• Auto-ranging for simplified operation
• Relative measurement mode for removing test lead resistance
• Min/Max data recording for capturing fluctuating measurements
• Data hold function to freeze readings
• Auto power-off feature (can be disabled for extended use)
• CE certified for safety compliance

Complete Kit Includes: 100 Series automotive multimeter, heavy-duty test leads with removable alligator clip ends, inductive RPM clamp, and temperature probe—everything needed for comprehensive automotive electrical diagnostics.