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ESMFS Vertical Top-Mounted Hessman Stainless Steel Multi-Float Level Switch sensor for Industrial automation and liquid monitoring field

The Hersman joint float switch is a high-performance liquid level control device that combines the Hersman joint with float switch technology, widely used in industrial automation and liquid monitoring fields.

Application Scenarios
1. Water Treatment Industry
Monitor the water levels in sewage and sedimentation tanks to prevent overflow or dry running of pumps, ensuring equipment safety.
2. Chemical Production
Measure the liquid levels of corrosive substances (such as acids, bases, solvents) in storage tanks to maintain production continuity.
3. Food Processing
Control liquid levels in production lines for beverages, dairy products, etc., in compliance with hygiene standards, easy to clean and maintain.
4. Automated Filling Equipment
Precisely control filling volumes, minimize errors and downtime, and enhance production efficiency.
5. Petrochemical Industry
Monitor the liquid levels in oil storage tanks and reactors, support explosion-proof designs, and ensure safe production.

    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.

    Product Features

    1. HARTMAN Connector Advantages
    Standardized Interface: Uses M20×1.5mm standard threaded interface, highly compatible, convenient for connection with pressure transmitters, PLCs, and other devices.
    High Protection Level: Protection rating reaches IP65 or above, effectively preventing ingress of moisture and dust, ensuring long-term stable operation.
    Easy Installation: Rotating locking mechanism design supports quick installation and removal, reducing downtime.

    2. Float Switch Features
    Durable Material: Float is made of stainless steel (such as 304/316L) or engineering plastics, corrosion-resistant and rust-proof, suitable for harsh environments with acids, alkalis, and salt spray.
    High Sensitivity: Embedded magnet in the float triggers reed switch action with liquid level changes, fast response, accuracy error ±2mm (in water).
    Multi-Point Control: Supports single-point or multi-point liquid level detection, flexible control achieved by customizing the guide rod length and float position.
    Explosion-Proof Design: Some models are explosion-proof certified (e.g., Ex d IIB T4), suitable for flammable and explosive areas.

    Product detail

    ESMFS-HS- (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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