Công tắc dòng chảy kiểu mái chèo SF Series

Finetek SF Series Paddle Type Flow Switch

General introduction

SF Series is switch model Paddle-type flow is used for a variety of liquids. Flow switch The paddle uses the flow force of the liquid to activate a chicken tongue switch. It can be triggered by even small currents around 5gpm (19.4l/m)


SF Series is a product line Paddle-type flow switches with changing paddle length for many flow conditions and pipe size. Paddle-type flow switch using force of fluid flow in a pipe to change the paddle. When the substance flow Liquid moves the paddle a compressed spring, and moves an image from. when no flow, or empty tubes, springs of wing-type flow switches rowing expands completely and contact the chicken tongue does not impact, in saying that there is no there is a flow or existence of empty pipe conditions. When there is a flow, the flow increased, the spring is compressed, and the fromtive component moves towards the chicken tongue switch. When the flow moves the rowing wing in an upward angle at least 20 to 30 degrees (or more) the magnet moves to  near the chicken tongue switch and activate it and close the contact to show that there’s a flow.


every standard version and explosion-resistant
Custom paddle length, 1~3″ (25.4~76.2mm)
Maximum pressure 355psi (25bar) and operating temperature up to 302°F (150°C)
PT 1″ Connection
SPDT Output, 60W @ 220VAC / 200VDC



  • Fluid flow detection
  • Protection of machinery requires cooling water flow

Application Industries

  • HVAC Chillers
  • Petrochemicals
  • Energy
  • Food processing
  • Many other sectors

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