I picked up a vintage motometer that reportedly did not work. After a minute or so using the lathe trick recommended here on the forum to settle the indicating fluid, it works fine. However, the end plug of the temperature sensing probe is missing. It kind of looks like the original end plug was either soldered or swedged on.
1. Does anyone have any good ideas for closing up the end of the sensor?
2. Should there be anything inside the end of the probe, or just air? Seems like I have seen something like lead shot used is similar applications before, maybe to help with heat transfer and help to support the glass bulb??
Jim, most I have worked on have a brass plug soldered in. Should be easy to make as it is thin. Tile grout works well to reinstall the thermometer tube. KB