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ESMFS M10 Threaded Single-pole liquid Level sensor Switch for Water level control

The ESMFS vertically mounted stainless steel single float switch is a high-reliability point-level liquid control sensor, designed specifically for industrial liquid level monitoring, alarm, and automatic start-stop control. It features a fully stainless steel structure and fully sealed construction, suitable for all kinds of harsh working conditions, providing global industrial customers with a stable and durable liquid level control solution. It is widely used in water towers, cooling water tanks, hydraulic stations, air compressors, food processing equipment, chemical storage tanks, ship equipment, and other industrial sectors, achieving liquid level limit alarms, dry run protection, and automatic pump control.

    Working Principle

    1. Vertical guide rod: A vertical stainless steel tube, usually Φ8mm, with a reed switch internally installed.
    2. Ring-shaped float: A hollow ring-shaped stainless steel float fitted around the outside of the guide rod, containing a built-in permanent magnet.
    3. Operating mechanism:
    When the liquid level rises, the float rises with it.
    As the magnet inside the float reaches the position of the reed switch on the guide rod, the magnetic field actuates the reed switch contacts, generating a switch signal (normally open closes, or normally closed opens).
    When the liquid level falls, the float descends, the magnetic field is removed, and the contacts reset.

    Product Features

    1. High-quality stainless steel material: The main body and float are made of 304/316 stainless steel, corrosion-resistant, high-temperature resistant (-10℃ to 120℃), rust-proof and wear-resistant, suitable for various media such as clean water, oils, and weakly corrosive liquids.
    2. Vertical installation design: Standard vertical top-mount, equipped with standard M10 threaded interface (G1/2, M12, M16 optional), easy to install without additional brackets, compatible with various water tanks, storage tanks, and equipment cavities.
    3. Stable magnetic drive: Built-in high-quality reed switch, buoyancy magnetic drive, no internal power consumption, precise and fast operation, no sticking or false actions, strong anti-interference capability.
    4. IP68 advanced waterproof: Fully sealed with glue casting process, waterproof and moisture-proof, can be immersed in liquid for long-term operation, stable in humid and dusty environments, with a lifespan of up to 2 million operations.
    5. Flexible contact options: Normally open/normally closed contacts optional, compatible with AC and DC voltage (0-220V), suitable for various control systems and devices, with wide application range.

    Product detail

    ESMFS-S-M10-1- (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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