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    Hot Water Flow Switch, 1-45 L/min, 1-60 L/min

    SKU: SUCH-FLS-ST01
    $58.82
    ● 1-45 L/min, 1-60 L/min ● G3/4", G1" water inlet ● Optional copper interface ● 2.3-3 L/min, 3-4 L/min start flow
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    šŸ•’ Delivery date: 6-12 days
    šŸ” 30-day Returns
    Overview

    High-performance water flow switches for hot water appliances and water circulation systems, supporting G3/4'ā€˜ and G1’' pipe connections respectively. Copper fittings are optional for compatibility with various pipe specifications. The flow switch offers selectable operating ranges of 1–45 L/min or 1–60 L/min, accurately detecting water flow changes. It automatically triggers a switch signal when flow reaches 2.3–3 L/min or 3–4 L/min, ensuring safe equipment startup. With a response time of just 0.2 seconds, it rapidly reacts to flow variations, preventing dry-firing or idle operation risks.

    Feature

    Hot water flow switch feature

    • The hot water flow switch features stable start-up and shut-off flow control capabilities, rapidly triggering switch signals during water flow changes to ensure timely equipment activation or deactivation based on flow status.
    • SUCH hot water flow switches support a broad operating flow range, meeting application requirements for hot water systems and piping equipment of varying scales.
    • With a response time of approximately 0.2 seconds, the flow switch rapidly detects water flow changes and outputs control signals.
    • Featuring an SM-3Y2Ɨ270 dual blue wire connection, installation requires only vertical mounting following the arrow direction. Maintain a minimum 2cm distance from magnetic objects to prevent magnetic interference affecting detection sensitivity.

    Dimension (unit: mm)

    G3/4"

    Hot water flow switch G3/4'' dimension

    G1"

    Hot water flow switch G1'' dimension

    Specs
    Model SUCH-ST01 / SUCH-ST03S (Copper Interface) SUCH-ST04 / SUCH-ST04S (Copper Interface)
    Pipe Diameter G3/4'' G1''
    Operating Flow Range 1-45 L/min 1-60 L/min
    Start Flow Range 2.3-3 L/min 3-4 L/min
    Shut-off Flow Range 1.8ļ½ž2.5 L/min 2.5–3.5 L/min
    Power Supply Current DC ≤100V
    AC ≤110V ≤0.5A
    Switching Power 10 W
    Wiring Method SM-3Y2Ɨ270 Dual Blue
    Insulation Resistance ≄100 MĪ©
    Switching Life 100,000 cycles
    Switch Response Time 0.2 s
    Mounting Method Install vertically following arrow direction (Keep at least 2 cm away from magnetic sources or magnetic objects during assembly to avoid sensitivity interference)
    Application

    Water flow switch for water heater

    Water Heater

    Water flow switch for boiler system

    Boiler System

    Water flow switch for HVAC equipment

    HVAC Equipment

    FAQ
    āÆ

    A hot water flow switch is a control component used to detect the flow state of water within a pipeline. When the water flow in the pipeline reaches a preset flow rate, the switch automatically triggers a signal to control the start or stop of related equipment. In practical applications, it is typically installed in the piping of water heaters, wall-mounted boilers, heating systems, or circulating water systems to determine whether water is flowing through.

    āÆ

    Hot water flow switches are typically installed on the inlet pipe or circulation pipe of equipment. The location should be chosen where water flow is stable, vibration is minimal, and maintenance is convenient. During installation, pay attention to the direction of water flow. Install according to the arrow direction marked on the product housing to ensure the internal structure can correctly sense changes in water flow.

    āÆ

    False triggering or reduced sensitivity in a hot water flow switch is typically related to water quality, installation method, or internal component wear.

    1. First, inspect the pipeline for impurities or scale buildup, as these deposits may interfere with the normal operation of the internal impeller or magnetic components.
    2. Second, verify that the water pressure and flow rate meet the device's activation criteria. Insufficient flow may prevent stable switching.
    3. Additionally, check that electrical connections are secure to avoid signal anomalies caused by loose wiring.
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