Blue White (F-40500LN-8) F-400N Inline Rotameter 0.5 - 5 GPM Flow Meter; 1-2" FPT
F-400N Inline Rotameter 0.5 - 5 GPM Flow Meter
The Blue White F-40500LN-8 delivers precision flow monitoring for reverse osmosis systems, filtration arrays, and commercial water treatment applications. Machined from high-quality acrylic and polished to optical clarity, this inline rotameter provides instant visual flow confirmation across the 0.5 to 5 GPM range with 1/2" female NPT threads for straightforward integration.
Built for Clarity and Accuracy
Optical-Grade Acrylic
Precision machined and polished to a glass-like finish for unobstructed scale visibility and long-term clarity
Easy-Read Scale
Bold, clearly marked graduations make flow rate monitoring simple from any angle
Inline Installation
Designed for direct plumbing integration with 1/2" FPT connections on both ends
Alarm Ready
Optional high/low level alarm contacts available for automated monitoring and process control
0.5 - 5 GPM Range
Ideal for RO permeate monitoring, filter performance verification, and dosing system confirmation
Industrial Construction
Blue & White F-400 series quality for reliable performance in demanding water treatment environments
Where the F-40500LN-8 Fits
This Blue White F-400N rotameter works with commercial and light industrial reverse osmosis systems, carbon filtration trains, chemical dosing loops, and process water monitoring. The 1/2" female NPT threads match standard plumbing connections on equipment from brands like Pentair, Watts, Omnipure, and Hydronix. Common installations include RO permeate lines, filter outlet monitoring, booster pump flow verification, and chlorine injection system checks. The 0.5 to 5 GPM flow range covers typical small to mid-sized filtration and treatment applications.
Blue & White has built flowmeters and chemical feed equipment for water treatment professionals since 1984.
