CurrentSense™ 4200M Micro-Current Detector
Ultra-sensitive current detection with WhisperProbe™ technology and zero-impact measurement modes.

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Detect. Sense. Wonder.
The PouCo CurrentSense™ 4200M specializes in measuring currents so small, you'll question whether electricity is even real. Using our revolutionary WhisperProbe™ technology, this device can detect micro-currents down to 0.01 μA—or at least it claims to.
“I measured the current flowing through my hopes and dreams. The reading was exactly what I expected: nearly zero.”- D.S., philosophical engineer
WhisperProbe™ Sensitivity
Some currents are shy. They don't want to be measured. The CS4200M respects their boundaries while still providing measurements:
- Ultra-low burden voltage (almost not there)
- Non-invasive measurement modes
- Current flow visualization that's mostly accurate
- Noise filtering algorithms trained on white noise generators
Specialized Design
Purpose-built for micro-current applications, the CS4200M features a specialized input stage, optional current clamp accessory, and a display that shows more decimal places than you'll ever need. Perfect for laboratory use or pretending to do laboratory work.
Data Logging Capabilities
Built-in memory stores up to 10,000 readings, which you can download via USB and forget about on your hard drive forever. Supports both manual and automatic logging modes.