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Updated: Jul 10, 2026

Measurement of Bioelectric Current with a Vibrating Probe

Measurement of Bioelectric Current with a Vibrating Probe

Published on: January 4, 2011

A new high performance battery-operated electrometer.

Meilu He¹, Pier Marzocca, Suresh Dhaniyala

¹Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, New York 13699, USA.

The Review of Scientific Instruments

|November 6, 2007

Summary

A new compact electrometer offers low noise and high sensitivity for measuring femtoampere currents. Its performance in aerosol particle counting demonstrates accuracy comparable to existing instruments.

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Last Updated: Jul 10, 2026

Measurement of Bioelectric Current with a Vibrating Probe

Measurement of Bioelectric Current with a Vibrating Probe

Published on: January 4, 2011

Area of Science:

Electrical Engineering
Environmental Science
Instrumentation

Background:

Electrometers are crucial for measuring small electrical currents.
Existing electrometers may lack portability, sensitivity, or low-noise performance for specific applications like aerosol detection.

Purpose of the Study:

To design and analyze a novel compact, battery-operated electrometer.
To evaluate its performance, including response time, sensitivity, and noise levels.
To assess its suitability for applications such as aerosol particle counters.

Main Methods:

A parametric experimental study was conducted to optimize electrometer components.
The electrometer's response time and sensitivity were measured under ideal conditions.
Comparative measurements were performed against a Keithley 6514 electrometer and an optical single particle counter.

Main Results:

The designed electrometer achieves femtoampere-level current measurement with a fast response time of approximately 3 seconds.
It demonstrated high accuracy and sensitivity in particle counting experiments, comparable to a commercial electrometer.
A damping component effectively reduced noise with minimal impact on response time.

Conclusions:

The developed compact electrometer offers a high-performance, portable solution for sensitive current measurements.
Its capabilities are well-suited for integration into instruments like aerosol particle counters.
The study validates the electrometer's design and its practical applicability in scientific instrumentation.