RFO flow-rate monitors from Gems combine a compact paddlewheel design with solid-state electronics, offering accurate flow rate measurement and integral visual confirmation. With materials like brass, stainless-steel or polypropylene, they handle diverse operating environments and pressures up to 500 psi. Featuring a pulsed output (4.5 to 24 VDC), RFO suits water purification, chemical metering and semiconductor processing. Their robust construction and wide compatibility ensure reliability in demanding applications like chillers, welders, and heat exchangers.