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ESMFS 304/316 stainless steel Water tank level control dual float level switch sensor

ESMFS Vertically installed stainless steel dual float level switch (linkage-type dual float) is a mature switch used for high and low liquid level dual-point control. It achieves automatic control of 'stop at upper limit, start at lower limit' (water supply) or 'start at upper limit, stop at lower limit' (drainage) through two independent floats and reed switches. The all-stainless-steel construction is suitable for high temperature, corrosive, and industrial environments.

Typical Applications
1. Water Supply: Automatic water replenishment for water towers, tanks, and boilers
2. Drainage: Automatic drainage for sumps, sewage treatment, and cooling towers
3. Equipment: Oil/liquid level protection for hydraulic stations, air compressors, and machine tools
4. Chemical Industry: Liquid level control for weak acid and weak alkali storage tanks, and food and beverage

    Working Principle

    The stainless steel float switch mainly consists of a float, a float rod, a switch assembly, and a housing. The float is usually made of 316L stainless steel, hollow inside, and can float on the liquid surface. The float rod connects the float to the switch assembly. When the liquid level changes, the float drives the float rod to move up and down, causing the switch assembly to close or open, thereby controlling the circuit connection or disconnection.

    1. Main body: SUS304/316 stainless steel sealed guide rod (φ8–10mm), built-in 2 reed switches (upper and lower control points).
    2. Float: 2 stainless steel floats, built-in annular permanent magnets, can slide freely along the rod.
    3. Wiring: 4-wire or 3-wire system, can be set to NO/NC.
    4. Operation:
    Liquid level rises → lower float → upper float rise sequentially
    Magnet approaches reed switch → contacts close / open
    Outputs two independent switch signals to achieve dual-point control.

    Product Features

    1.Strong Corrosion Resistance: Made of stainless steel materials such as SUS304 and SUS316, suitable for various corrosive liquid environments, such as chemical raw materials, acid and alkaline solutions, etc.
    2.Good High-Temperature Performance: The all-stainless-steel float switch can withstand temperatures up to 200°C, meeting the requirements for liquid level control in high-temperature liquids.
    3.Simple and Reliable Structure: The structure is simple and easy to assemble, resistant to failure, with strong anti-interference capability and stable operation.
    4. Multi-Point Control: A single device can be set with 1 to 8 switch points to achieve multi-point liquid level control, with each control point customizable according to customer needs.

    Product detail

    ESMFS-S-M10-2- (2)ESMFS- (3)ESMFS- (4)

    Technical Specifications

    TYPES

    Low pressure

    high pressure

    Maximum power

    10W

    50W

    Maximum switching voltage

    100VDC

    220VDC

    Maximum switching current

    0.5A

    1.5A

    Minimum collapse voltage

    220VDC

    300VDC

    Maximum load current

    1A

    3A

    Maximum contact resistance

    100mΩ

    100mΩ

    temperature range

    -20~+80

    -20~+80

    Float material

    SUS304/316

    SUS304/316

    Card spring material

    SUS304/316

    SUS304/316

    Wiring Definition

    This is a paragraph

    1. Black, White - Power
    2. Green - Ground
    3. Yellow - Common (COM), Blue - Normally Closed (NC), Red - Normally Open (NO)

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