Liquid Flow Switch, G1/2'', 1-30 L/min

SKU: SUCH-FLS-ST09
$67.11
● 1-30 L/min ● G1/2'' interface ● 10W switching power ● 1.2-2 L/min start flow
🚚 Free shipping
🕒 Delivery date: 6-12 days
🔁 30-day Returns
Overview

The high-performance liquid flow switch operates within a flow range of 1-30 L/min, with a stable activation flow of 1.2-2 L/min and a deactivation flow of 1-1.8 L/min. Its response time is a mere 0.2 seconds, enabling rapid and precise water flow detection. The flow switch features a G1/2'' standard connection and withstands water pressure up to 1.75MPa. For stable performance, install vertically following the arrow direction and maintain a minimum 2cm distance from magnetic sources to ensure consistent sensitivity.

Feature

Liquid flow switch feature

  • Wide Flow Range: The liquid flow switch operates within a flow range of 1–30 L/min, with an activation flow controlled at 1.2–2 L/min and a deactivation flow of 1–1.8 L/min. It features high sensitivity and excellent repeatability, enabling precise detection of water flow state changes.
  • Rapid Response Performance: With a response time of just 0.2 seconds, the flow switch instantly switches actions upon flow changes. This enables effective interlock control and dry-run protection, enhancing system safety and stability.
  • Pressure-Resistant Reliable Structure: Withstands maximum water pressure ≤1.75 MPa. Its robust structural design and excellent sealing ensure long-term stable operation under high-pressure conditions.
  • Stable Electrical Performance: Supports DC≤100V and AC≤110V≤0.5A. Rated power: 10W. Switch life: up to 10⁸ cycles. Durable and reliable electrical contacts make it suitable for frequent start-stop applications.
  • Convenient and Standardized Installation: The SUCH liquid flow switch features a G1/2'' interface design and comes with an SI-3Y2×350 dual red cable. Install vertically following the arrow direction and maintain a minimum distance of 2cm from magnetic sources to ensure detection accuracy and service life.

Dimension (unit: mm)

Liquid flow switch dimension

Specs
Working Flow Range 1-30 L/min
Start Flow Range 1.2-2 L/min
Shut-off Flow Range 1-1.8 L/min
Connection Wire Specifications SI-3Y2×350 Dual Red
Interface Dimensions G1/2''
Switching Power 10W
Water Pressure Resistance ≤1.75 MPa
Voltage and Current DC ≤100V; AC ≤110V ≤0.5A
Switching Life 10⁸ cycles
Switching Response Time 0.2 s
Installation Orientation Install vertically in the direction of the arrow (When assembling the entire unit, keep at least 2 cm away from magnetic sources or magnetic objects to avoid affecting sensitivity).
Application

Flow switch for wate heater circulation system

Water Heater Circulation System

Flow switch for control panel system

Control Panel System

Flow switch for circulating water system

Circulating Water System

FAQ

A liquid flow switch is primarily used to detect “whether flow exists” or “whether flow reaches a set value.” It functions as a switch-type output device, activating its contacts when the flow reaches or falls below the set value to enable start/stop control or protective functions. In contrast, a flow sensor measures continuous flow values, typically outputting pulses or analog signals for metering and monitoring purposes.

Most liquid flow switches require specific installation orientations, particularly paddle-type or magnetic models. These typically must be mounted vertically or horizontally according to the directional arrow to ensure proper internal operation. Incorrect orientation may cause inaccurate start-up flow detection or switch failure. Before installation, verify the mounting method specified in the product manual and ensure no air bubbles or impurities in the pipeline affect detection accuracy. Additionally, keep the switch away from strong magnetic fields or vibration sources to prevent interference with normal operation.

Common malfunctions include normal water flow without device activation, pump false shutdowns, abnormal output signals, or delayed responses. Troubleshooting should begin by checking for pipeline blockages and verifying flow reaches the set threshold. Subsequently, use a multimeter to test contact conductivity. If insulation resistance drops or contact erosion is detected, replace the unit promptly. Regularly clean the filter screen, inspect wiring connections, and examine sealing structures to extend service life and minimize failures.

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