Product Overview

The NOIKE-AH Explosion-Proof Paddle Flow Switch NK01BS-RS is a rugged mechanical flow monitoring device designed for hazardous industrial environments. It is specifically engineered for reliable flow detection in applications where explosion protection and dependable switching performance are essential.

The switch operates using a stainless steel paddle mechanism. When the fluid flow reaches the preset switching point, the paddle is pushed by the flowing medium and mechanically actuates the built-in SPDT microswitch, providing a reliable electrical output for alarms, pump protection, or process control.

Constructed entirely from stainless steel wetted parts with an explosion-proof junction box, the flow switch offers excellent durability, corrosion resistance, and long service life in demanding industrial applications.

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Working Principle

The explosion-proof paddle flow switch NK01BS-RS operates using a mechanical paddle sensing principle.

As liquid or gas flows through the pipeline, it pushes the stainless steel paddle installed inside the flow switch. When the flow reaches the preset value, the paddle moves the internal mechanical linkage, which activates the built-in SPDT microswitch.

When the flow falls below the set point, the paddle automatically returns to its original position, resetting the switch.

This simple mechanical operating principle provides dependable flow monitoring without complex electronic sensing components.

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Key Features

• Explosion-proof mechanical paddle flow switch
• Suitable for both liquid and gas applications
• SPDT microswitch output (Normally Open + Normally Closed)
• High working pressure up to 100 bar
• Stainless steel wetted components
• Stainless steel explosion-proof junction box
• Low pressure loss during operation
• High switching repeatability
• Easy installation and adjustment
• Reliable mechanical operation
• Excellent corrosion resistance
• Designed for hazardous industrial environments

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Technical Specifications

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Materials

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Typical Applications

The explosion-proof paddle flow switch NK01BS-RS is suitable for hazardous industrial areas requiring reliable flow monitoring, including:

• Fire protection systems
• Chemical processing plants
• Industrial automation
• Mechanical equipment
• Metallurgical and smelting facilities
• Hydraulic systems
• Lubrication systems
• Pump protection
• Cooling water circulation
• Process control systems

Suitable for both liquid and gas applications.

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Product Advantages

Designed for Hazardous Areas

The explosion-proof enclosure enables safe operation in industrial environments where explosion protection is required.

Reliable Mechanical Switching

The paddle directly actuates a built-in microswitch, providing stable and repeatable flow detection without electronic sensing elements.

High Pressure Capability

Designed for operating pressures up to 100 bar, making it suitable for demanding industrial systems.

Corrosion-Resistant Construction

All major wetted components are manufactured from stainless steel for long-term durability.

Low Pressure Loss

The optimized paddle structure minimizes pressure drop while maintaining dependable switching performance.

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Ordering Information

To ensure the correct model and factory preset, please provide the following information when placing an order:

1. Flow Direction
   • Direction of medium flow
   • Medium type
   • Pipe diameter
   • Required switching point
2. For Viscous Media
   • Medium type
   • Viscosity
   • Operating temperature
3. For Gas Applications
   • Gas type
   • Operating temperature
   • Pressure (Gauge Pressure or Absolute Pressure)
4. Microswitch Options
   • Imported microswitches are available upon customer request.

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Frequently Asked Questions (FAQ)

What is an explosion-proof paddle flow switch NK01BS-RS?

An explosion-proof paddle flow switch NK01BS-RS is a mechanical flow monitoring device designed for hazardous environments. It detects fluid flow using a stainless steel paddle that actuates an internal microswitch when the preset flow rate is reached.

What media can this flow switch monitor?

It is suitable for both liquids and gases, including cooling water, lubricating oil, hydraulic oil, compressed air, and other compatible industrial media.

Is a power supply required?

No. The paddle sensing mechanism is completely mechanical. Only the SPDT microswitch is connected to the external control circuit.

What output signal is available?

The switch provides an SPDT microswitch output, including:

• Normally Open (NO)
• Normally Closed (NC)

This allows easy integration with PLCs, relays, alarms, and industrial control systems.

What is the maximum operating pressure?

The maximum working pressure is 100 bar.

What industries commonly use this switch?

Typical industries include:

• Fire protection
• Chemical processing
• Oil & Gas
• Metallurgy
• Hydraulic equipment
• Industrial automation
• Mechanical manufacturing
• Lubrication systems
• Water treatment

Can the switching point be preset before shipment?

Yes. Provide the medium type, flow direction, pipe diameter, and required switching point when ordering, and NOIKE-AH can preset the switch before delivery.

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Why Choose the NOIKE-AH Explosion-Proof Paddle Flow Switch NK01BS-RS?

The NOIKE-AH Explosion-Proof Paddle Flow Switch NK01BS-RS combines high-pressure capability, stainless steel construction, explosion-proof protection, and reliable mechanical switching in one robust solution. It is an ideal choice for flow monitoring and equipment protection in hazardous industrial environments where safety, durability, and dependable performance are essential.

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Size Chart（mm）