Grease Spot Photometer
Posted: Thu Jan 22, 2026 3:10 pm
With a Grease Spot Photometer or Bunsen Photometer /German Fettfleck Fotometer) you can compare two electrical powers of any alternating and direct currents of any waveform and frequencies up to the GHz range.
To do this, I place oil-soaked paper in the middle between two identical light bulbs, through which the currents to be compared flow.
Rear lamp more power than front lamp:
Front lamp more powerful than rear lamp:
To do this, I place oil-soaked paper in the middle between two identical light bulbs, through which the currents to be compared flow.
- 1_fett1.JPG (6.41 KiB) Viewed 49 times
- 1_fett2.JPG (5.94 KiB) Viewed 49 times