The difference between an analog and digital voltmeter is the impedance. An analog voltmeter is low impedance and a digital one is high impedance. Fluke makes a digital multi-meter with dual impedance.
Excellent explanation from Fluke here including ghost voltages:
analog vs digital and high vs low impedance voltmetersOne nice thing about an analog meter is that it doesn't need a battery like digital ones do. I bought a digital one from HF for our TT and I've forgotten to turn it off a few times and killed the battery. :(
I have an old neon bulb voltage tester similar to the one in the photo. As mentioned in the Fluke article, it could be a ghost voltage but can lead you to conclude that you have a solid 120 volt circuit. Dad gave it to me decades ago and I've never used it for that reason. Same situation can happen with a NCVT.
