Oil, Chemical, Liquid Flowmeter medium: petroleum, high water-content crude oil, low/middle/high viscocity petrochemical etc. The ... oil, also for heated and/or viscous liquids; -oil or water based latex products, polyester resins, and adhesives (neutral pH), also for ... , 1.6, 2.5, 4.0, 6.3medium: petroleum, high water-content crude oil, low/middle/high viscocity petrochemical & chemical solvents ...