---
product_id: 594423472
title: "HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor"
brand: "hjconstr"
price: "€ 6.34"
currency: EUR
in_stock: false
url: https://www.desertcart.hr/products/594423472-hjjsfs02-adjustable-copper-brass-water-flow-switch-reed-switch-principle
store_origin: HR
region: Croatia
---

# Magnetic float softens water G1/2" male thread fit 1.2-12L/min flow range HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor

**Brand:** hjconstr
**Price:** € 6.34
**Availability:** ❌ Out of Stock

## Summary

> 💧 Flow smarter, not harder — the sensor your system deserves!

## Quick Answers

- **What is this?** HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor by hjconstr
- **How much does it cost?** € 6.34 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/594423472-hjjsfs02-adjustable-copper-brass-water-flow-switch-reed-switch-principle)

## Best For

- hjconstr enthusiasts

## Why This Product

- Trusted hjconstr brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust & Compact:** Waterproof, heat and pressure resistant with a sleek, space-saving design for easy installation.
- • **Durable Brass Build:** Crafted from ROHS-compliant brass ensuring long-lasting corrosion resistance and reliability.
- • **Smart Magnetic Float:** Innovative magnetic float not only measures flow but also helps soften water quality naturally.
- • **Precision Flow Control:** Accurately measures liquid flow from 1.2 to 12L/min for optimized system performance.
- • **Universal Pipe Compatibility:** G1/2" male threaded design guarantees seamless integration with standard water pipes.

## Overview

The HJJSFS02 Adjustable Copper Brass Water Flow Switch is a compact, durable sensor designed for precise liquid flow measurement between 1.2 and 12 liters per minute. Featuring a G1/2" male threaded brass body compliant with ROHS standards, it ensures easy installation and long-term reliability. Its magnetic float uniquely contributes to water softening while providing accurate flow detection, making it ideal for water heaters and fluid monitoring systems requiring waterproof, heat, and pressure resistance.

## Description

1.Working Principle: The magnetic phase repulsion of a pair of permanent magnet floats and the impact force of water flow are used to cooperate with the reed switch to output the switching signal; 2.With the product arrow as the direction of the water inlet, horizontal and vertical both ok;

## Features

- ★This flow sensor switch is made of brass, all materials are in line with ROHS testing standards.
- ★ Flow range: 1.2～12L/min.Max working pressure: 1.2MPa.
- ★G1/2" male thread to fit on your water pipe well. The flowmeter can be used in a wide range of instruments to measure the flow of fluid in pipes.
- ★Magnetic float can magnetize water quality at the same time, play the role of softening water quality
- ★Waterproof, heat resistance, pressurresistance, cold resistance, small size, stable and reliable. Easy to install.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CNGFKRKQ |
| Batteries Required? | No |
| Best Sellers Rank | #796,835 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #864 in Flowmeters |
| Date First Available | November 16, 2023 |
| Included Components | FLOW SWITCH |
| Item Package Quantity | 1 |
| Item Weight | 4.2 ounces |
| Item model number | HJJSFS02 |
| Manufacturer | HJJS |
| Material | Brass |
| Mounting Type | Tabletop Mount |
| Part Number | HJJSFS02 |
| Product Dimensions | 2.44 x 0.79 x 0.79 inches |
| Sensor Technology | Contact Sensor |
| UPC | 752844192518 |

## Product Details

- **Brand:** HJCONSTR
- **Color:** Yellow
- **Control Method:** Touch
- **Power Source:** Corded Electric
- **Voltage:** 200 Volts

## Images

![HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor - Image 1](https://m.media-amazon.com/images/I/618vpQDqTvL.jpg)
![HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor - Image 2](https://m.media-amazon.com/images/I/61ev55WZSQL.jpg)
![HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor - Image 3](https://m.media-amazon.com/images/I/513ryJPdzzL.jpg)
![HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor - Image 4](https://m.media-amazon.com/images/I/714+jw2RffL.jpg)
![HJJSFS02 Adjustable Copper Brass Water Flow Switch Reed Switch Principle Liquid Flow Sensor Magnetic External Wire Hall Flow Meter Low Flow Start Turbine Flow Meter Water Heater Water Flow Sensor - Image 5](https://m.media-amazon.com/images/I/81YYdd0Mt8L.jpg)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-05*