Dwyer DR4149M is a high flow glass flowmeter, suitable for use with compatible gases or liquids. It features 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 designed for vertical mounting and has a pressure limit of 200 psig (13.8 bar). It has a 6-turn needle valve and a turn-down ratio of 10:1. Wetted materials include borosilicate glass, 316 stainless steel, PTFE, and brass or 316 stainless steel fittings. It has a compact 127 mm direct reading scale for air or water and a 3/8" female NPT connection. The flowmeter has a repeatability of ±0.25% of scale reading.