Magnetic Float Level Switch NK004 Series | Stainless Steel Reed Switch Level Sensor

Brand：NOIKE-AH
Model：NK004

Specification

Product Description

The magnetic float level switch NK004 Series is designed for reliable liquid level detection using a magnetic float and reed switch mechanism. A hermetically sealed non-magnetic stainless steel tube houses the reed switch, while the float contains an annular magnetic ring.

As the liquid level rises or falls, the float moves along the guide tube. The magnetic field activates or releases the internal reed switch, generating a switching signal for level monitoring and control.

The switch can be installed from either the top or the bottom of the tank. Its compact and robust construction provides reliable operation, excellent repeatability, long service life, and resistance to high operating temperatures.

Applications

The magnetic float level switch NK004 Series is suitable for liquid level measurement of media with a density of 0.75 g/cm³ or higher.

Technical Specifications

Parameter	Specification
Maximum Pressure	5 bar
Medium Temperature	-10°C to 130°C
Medium Density	≥0.75 g/cm³
Output Options	Normally Open (NO), Normally Closed (NC), or NO + NC
Contact Type	Reed Switch
Contact Rating	250V AC, 5A
Protection Rating	IP65
Wiring Options	Direct Cable or Plug-in Connector
Available Materials	Brass, POM Engineering Plastic, Stainless Steel

Features

Hermetically sealed reed switch for reliable switching performance
Magnetic float design for accurate liquid level detection
Top or bottom installation options
Compact and rugged construction
Excellent repeatability
Long service life
High-temperature resistance
Multiple material options to meet different application requirements

Additional Information

Applicable media diagrams, wiring diagrams, and dimensional drawings (mm) are available.
Specifications can be customized according to user requirements and site installation conditions.

Why Choose This Magnetic Float Level Switch?

Choosing the right liquid level switch is essential for stable and reliable level monitoring. This magnetic float level switch combines a reed switch sensing mechanism with a magnetic float design to deliver dependable switching performance for industrial liquid level applications.

Reliable Reed Switch Technology

A hermetically sealed reed switch inside a non-magnetic stainless steel tube provides stable switching signals as the float moves with changing liquid levels.

Flexible Installation

The switch can be installed from either the top or the bottom of the tank, making it suitable for different installation requirements.

Durable Construction

Available in brass, POM engineering plastic, and stainless steel, allowing users to select the appropriate material according to their application.

Multiple Output Options

Supports Normally Open (NO), Normally Closed (NC), and NO + NC output configurations for different control systems.

Long Service Life

The compact structure offers reliable performance, excellent repeatability, and long operating life.

Frequently Asked Questions (FAQ)

1. How does a magnetic float level switch work?

The float moves with the liquid level. Its internal magnetic ring activates or releases the reed switch inside the stainless steel tube, generating a switching signal.

2. What liquids can this level switch measure?

It is suitable for liquids with a density of 0.75 g/cm³ or higher.

3. What output options are available?

The switch is available with:

Normally Open (NO)
Normally Closed (NC)
NO + NC

4. What materials are available?

The magnetic float level switch is available in:

Brass
POM engineering plastic
Stainless steel

5. What is the maximum operating pressure?

The maximum working pressure is 5 bar.

6. What operating temperature does it support?

The medium temperature range is -10°C to 130°C.

7. What wiring options are available?

Users can choose between:

Direct cable connection
Plug-in connector

8. Can the specifications be customized?

Yes. Specifications can be customized according to user requirements and site installation conditions.

Application Case

Reliable Liquid Level Monitoring in Industrial Storage Tanks

In industrial processes, maintaining accurate liquid level control is essential for ensuring equipment safety and stable operation. The magnetic float level switch is widely used as a point-level detection device in storage tanks, process vessels, and water treatment systems where a dependable switching signal is required.

For example, in a cooling water storage tank, the float level switch can be installed at a predetermined liquid level to monitor high or low level conditions. As the liquid level changes, the magnetic float moves along the guide tube and actuates the internal reed switch. The generated switching signal can be connected to a PLC, relay, or control system to trigger alarms, start or stop pumps, or protect equipment from dry running or overflow conditions.

With a hermetically sealed reed switch, IP65 protection rating, and operating temperatures from -10°C to 130°C, the switch provides stable performance in demanding industrial environments. Available in brass, POM engineering plastic, and stainless steel, it can be selected according to different process media and installation requirements. Its compact structure, excellent repeatability, and simple installation make it a practical solution for reliable liquid level monitoring across a wide range of industrial applications.