| Using a thermopile and galvanometer, he demonstrated that UV rays from an arc lamp are several orders of magnitude more lethal than visible rays. |
| This was balanced by a potentiometer arrangement, so that the galvanometer spot came to zero. |
| Line Test: when pressing on the A group key, the galvanometer must indicate 10µA per receiver connected. |
| In 1902, a Dutch physiologist published the first ECG recorded with his 270-kg machine, the string galvanometer, for which he was awarded a Nobel Prize. |
| By means of a potentiometer the galvanometer spot may be brought back to the original position. |
| Evidence of animal electricity was given about 1840 by Carlo Matteucci, using the astatic galvanometer invented by Leopoldo Nobili. |
