High Precision AC/DC Clamp Current Sensor with Oscilloscope Probe

Measure AC and DC current accurately with this compact clamp sensor, designed for engineers, technicians, and lab applications. With mA-level resolution and flexible output scaling, it’s ideal for both low-current testing and general electrical diagnostics.

Key Features

• Wide Range: 0.00 mA – 50 A (AC/DC)
• High Resolution: 1 mA for low-current measurement
• Dual Output Modes: 10 mV/A and 100 mV/A (switchable)
• Oscilloscope Ready: Direct voltage output for waveform analysis
• Compact Jaw: φ7 mm for small conductors and tight spaces
• Multi-Interface Output: BNC, banana plug, 3.5 mm, or bare wire

Ideal Applications

• AC/DC current measurement
• Low-current (mA-level) testing
• Power and energy analysis
• Circuit diagnostics and lab testing
• Custom instrument integration

Output Scaling (Oscilloscope Use)

This sensor converts current into a proportional voltage signal for easy measurement:

• 10 mV/A mode: 1 A = 10 mV
• 100 mV/A mode: 1 A = 100 mV

You can calculate current directly from the measured voltage:

• 10 mV/A → I = V ÷ 10
• 100 mV/A → I = V ÷ 100

Example: In 100 mV/A mode, a 10 mA current produces approximately 1 mV output.

👉 For low-current measurements, the 100 mV/A mode provides better sensitivity and is recommended.

How It Works

• With Oscilloscope:
  Outputs a voltage proportional to current, allowing waveform observation and analysis
• With Multimeter:
  Works with mA input mode using a 2500:1 transformer ratio for direct reading
• With Custom Systems:
  Can be integrated into self-developed measurement setups as a current probe

Technical Specifications

• Model: ETCR007AD
• Range: 0.00 mA – 50 A (AC/DC)
• Resolution: 1 mA
• Accuracy: ±3.0%
• Jaw Size: φ7 mm
• Frequency Range: 10 Hz – 400 Hz
• Output Modes: 10 mV/A or 100 mV/A
• Output Interfaces:
  • BNC plug
  • 4.0 mm dual banana plug
  • 3.5 mm audio plug
  • Bare wire

Power Supply

• 9V battery

Package Includes

• 1 × AC/DC Clamp Current Sensor

Notes

• Use 100 mV/A mode for improved accuracy at low currents
• Avoid strong electromagnetic interference during measurement
• Clamp only a single conductor for correct readings

Detailed Images: