As the fluid flow moves the paddle an internal spring is compressed, which moves a magnetic element. With no flow, or with an empty pipe condition, the paddle flow switch spring is fully expanded and the magnetically activated reed switch contact is open, indicating that a no-flow or empty pipe condition exists. As flow increases, the spring is compressed and the magnetic element moves toward the reed switch. When the flow moves the paddle in an upward angle of at least approximately 20⁰~30⁰ (or more) the magnet moves into proximity of the reed switch and activates it and the contact closes to indicate that a fluid flow condition exists.
Standard and explosionproof versions
Field customizable paddle length, 1~3″ (25.4~76.2mm)
Maximum pressure up to 355psi (25bar) and operating temperature to 302⁰F (150⁰C)
1″ PT threaded process connection
SPDT output contact, 60W@220VAC/200VDC rating
USE
Detect adequate fluid flow for operation of downstream process
Protect machinery requiring coolant flow
INDUSTRY
HVAC chillers
Petrochemical
Power
Food processing
Many others