How To measure Electric Eel Shocks

Ken Catania hat eine Vorrichtung gebaut, um die Stromstärke von elektrischen Aalen zu messen. Die Viecher gaben im Experiment Schocks von 43 Milli-Ampere ab, was wohl ganz anständig und bereits für Menschen lebensgefährlich ist.

Paper: Power Transfer to a Human during an Electric Eel’s Shocking Leap
The Register: Mad scientist zaps himself to determine the power of electric eel shocks

Paradigm for measurement of current through the subject’s arm.

(A) Plastic chamber designed to preserve the hand-water interface while providing a low-resistance path (insulated 16G copper wire) back to the main body of water. Current was measured with a hall-effect ammeter independent of the circuit.

(B) Schematic of the eel, arm, and water, illustrating the circuit and current flow (red arrows). The ammeter was connected to a Powerlab data acquisition unit, which simultaneously recorded timestamps from the high-speed video camera.

(C) Frames from high-speed video documenting the eel and the subject’s arm. Arrow marks break in circuit as arm was withdrawn.

(D) Current recording during the eel’s shocking leap. Current increased as the eel ascended, as predicted from the equivalent circuit in Figure 1. Current peaks were approximately 43 mA.