Digital read out static meters

for cd static charge ; to prove it exists/ to prove the remedy worked.

Easy solution. Don’t buy a meter.

Do you know what goes into one? ... the BOM cost at the quantify manufactured? How about the amortized engineering costs? tooling costs? Sales and marketing overhead?

Do you work for free?

There ya go  cheap analog readout not digital so it sounds better 
https://www.ebay.com/itm/Chapman-EOS-100-Electrostatic-Meter/312636421144?epid=739271208&hash=item48ca953418:g:mb4AAOSwVaZc6Dtv

they were available as science  kits in radio shack without the digital readout( which should lower the cost even further).