#acid

When im making apvp i have to hit level 5 of ph but it's very hard to be precise on the 5 if im almost at 5 and poured very tiny bit too much it always jumps to 4 or lower, my question is, is there a digital ph meter with a rod tthat can resist acid who can tell me precisely what level ph im on...

Hello! Can anybody explain how to process D-Lysergic Acid Methyl Ester to LSA?