Dwyer VFA-42 Visi-Float® Acrylic Flowmeter is a reliable and accurate instrument for measuring the flow of compatible gases and liquids. With an accuracy of 5% of full scale (FS) for VFA and 3% of FS for VFB, it can be mounted in a vertical position. The flowmeter's wetted materials include acrylic plastic, Buna-N O-ring, and nickel plated brass, with optional stainless steel parts. It has a pressure limit of 100 psig (6.9 bar) @ 150°F (65°C) without valve and 100 psig (6.9 bar) @ 120°F (48°C) with valve. The process connection is 1/8" female NPT, except for VFB ranges 85 and 86 that have 1/4" NPT back connections or 3/8" NPT end connections. The flowmeter is available with scales of 2" for VFA and 4" for VFB.