... Technology2.more than 40-hour battery (rechargeable), back-lit 4 lines letters display all integrated into a rugged, watertight enclosure ... somewhat dirty liquids.6.Lightweight and easily transportable in case7.4-20 mA, OCT pulse (flow rate or total flow) output as ... including crude oil, lubricating oil, diesel oil, fuel oil, etc.4.Chemicals, including alcohol, acids, etc.5.Solvents6.Beverage and food ...