Here's a video that goes into detail what is inside Mark-Super-7 E-Meter. https://piped.video/watch?v=N2O0oen6E90
The successor requires an online activation to be used. Unlike my UT81-B multimeter with integrated scope.
Btw i feel like we should make a mod for the E-Meter to allow users to plug in different probes to use them as proper resistance meters. You know, for the electrically inclined ex-scientologist.