220V Spectrum Tube Power Supply with Safety Door, US Standard Subcategory_Meters and Testers and balance arms during physics

and balance arms during physics force and pressure experiments

set in motion by ion wind from corona discharge whenever the apparatus is connected to a high-voltage source

Used to display the audio spectrum on a CRO

Digital AC/DC power supply with three independent DC outputs

Autoclavable polypropylene test tube stand holding six 25-mm tubes with six drying pins on the back

220V Spectrum Tube Power Supply with Safety Door, US Standard Subcategory_Meters and Testers and balance arms during physicsA safety door interlock prevents contact with energized electrodes by cutting power whenever the door opens, providing 220V excitation for atomic emission spectroscopy tubes.