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Low flow switch

Low flow switch

Low-cost miniature variable area flow switch, where the float is controlled by a spring inside the cylindrical measuring tube. The flowing medium pushes the float in the direction of flow. Sealed reed contacts are mounted on the outside of the measuring tube. When the float reaches the reed contact position, the switch closes. As the flow increases, the float continues to move upwards until it reaches the built-in float stop, while still keeping the switch closed, thus ensuring bistable switching functionality at all times. The reed contacts can be adjusted throughout the entire switching range of the instrument.

Flow switch type IV

Flow switch type IV

Type IV flow switches are made of brass alloy and stainless steel, with pipe connection sizes DN40 (1/2″), DN32 (1/4″), or DN25 (1″). Inside the flow switch, there is a spring-loaded, calibrated disc. When fluid passes through, the disc is lifted, and the shaft supporting the disc is connected to a lever for mechanical transmission, causing the microswitch to be triggered at a preset flow value. Once the microswitch is triggered, it starts the pump or opens the valve. As the flow increases, the flow area also increases, and the increased flow can push the disc to the fully open position. The maximum flow is limited only by the pump's discharge capacity and the pressure drop acceptable for the specific application. Important applications: Dry pump protection, low flow alarm in cooling circuits, freeze protection for heating pump systems, heating protection tools in induction heating devices.

Flow switch type IIIa

Flow switch type IIIa

III, IIIa type flow switch pipe section connection size DN15 (1/2 inch) or DN20 (3/4 inch), the switch part is made of brass alloy and the inside is made of stainless steel. The IIIa type switch uses an epoxy plastic composite plate component to protect the sensor. The flow switch contains a spring-loaded, calibrated disc. When fluid passes through, the disc is lifted. The shaft supporting the disc is connected to a lever for mechanical transmission, causing the microswitch to be triggered at a preset flow value. Once the microswitch is triggered, it starts the pump or opens the valve. The flow increases, and the flow area also increases. The increased flow can push the disc to the fully open position. The maximum flow is only limited by the pump's water output capacity and the pressure drop acceptable for the specific application. Key applications: Dry pump protection, low flow alarm in cooling circuits, freeze protection in heating pump systems, heating protection tools in induction heating devices.

Flow switch Type III

Flow switch Type III

III, IIIa type flow switch pipe section connection size DN15 (1/2 inch) or DN20 (3/4 inch), the switch part is made of brass alloy and the inside is made of stainless steel. The IIIa type switch uses an epoxy plastic composite plate component to protect the sensor. The flow switch contains a spring-loaded, calibrated disc. When fluid passes through, the disc is lifted. The shaft supporting the disc is connected to a lever for mechanical transmission, causing the microswitch to be triggered at a preset flow value. Once the microswitch is triggered, it starts the pump or opens the valve. The flow increases, and the flow area also increases. The increased flow can push the disc to the fully open position. The maximum flow is only limited by the pump's water output capacity and the pressure drop acceptable for the specific application. Key applications: Dry pump protection, low flow alarm in cooling circuits, freeze protection in heating pump systems, heating protection tools in induction heating devices.

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