Dwyer DR4144 is a High Flow Glass Flowmeter designed for use with compatible gases or liquids. It has a temperature range of up to 250°F (121°C) and an accuracy of ±10% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute). The flowmeter is mounted vertically and can handle pressures up to 200 psig (13.8 bar). Constructed with borosilicate glass and 316 SS materials, it offers excellent durability. The flowmeter comes with a 6-turn needle valve and a 10:1 turn-down ratio. Its 3/8" female NPT connection and direct reading 127 mm scales for air or water make it easy to use and read. With a repeatability of ±0.25% of scale reading, this flowmeter is highly accurate and reliable.