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FS Magnetic Reed Switch Normally Open Piston Flow Switch

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FS Flow Switch is made of metal shell and switch element. The principle of the product is to install a permanent magnet with reliable performance inside, and the flowing medium pushes the magnetic moving parts inside the switch, then the switch action is triggered by magnetism to achieve the alarm function. It is often used to control the start and stop of pump valves and the cut-off protection of cooling circulation system.


  • Wide range for measuring gauge, absolute and sealed gauge pressures

  • Mechanical parts are completely isolated from electronic parts

  • Minimal pressure loss

  • Great repeatability

  • Dual-use for vapor and liquid , can be used for water-cooling system and hydraulic system

Technical Parameters

Measuring Medium

Water, gas, oil

Output Signal

Reed switch, normally open

Contact Capacity


Maximal Withstand Pressure

30bar(Aluminum), 100bar (Stainless Steel)

Medium Temperature


Protection Grade


Electronic output

PG9 DIN43650

Our product philosophy is specialization, customization, and intelligence.

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    Add : Room 201, Building 5, No.18, Fenghua Road, Yuhua Economic Development Zone, Nanjing, Jiangsu,China
    Phone : +86-13270442058
    E-mail : info@hjsensor.com
   Whatsapp : +86-13270442058
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