NK01BS Explosion-Proof Flow Switch NK01BS

Target Type Direct Explosion-Proof Flow Switch NK01BS | Mechanical Paddle Flow Switch for Water, Oil & Gas

Brand：NOIKE-AH
Model：NK01BS

Specification

Product Overview

The NOIKE-AH Direct-Mount Explosion-Proof Flow Switch NK01BS is an upgraded version of the NK01B mechanical explosion-proof flow switch, specifically designed for hazardous industrial environments. It features a built-in spring-supported paddle that mechanically actuates an internal microswitch when the flow reaches the preset switching point.

The NK01BS supports direct in-line installation, making installation quick and convenient while reducing maintenance requirements. Its stainless steel construction, adjustable switching knob, and excellent resistance to contamination ensure reliable long-term performance in demanding applications.

Suitable for monitoring water, oil, and gas, the NK01BS provides dependable flow detection for industrial automation, equipment protection, and process control.

Working Principle

The NK01BS Explosion-Proof Flow Switch NK01BS operates using a mechanical spring-supported paddle mechanism.

As the process medium flows through the pipeline, it pushes the stainless steel paddle inside the switch. Once the flow reaches the preset value, the paddle moves against the spring and mechanically activates the built-in microswitch.

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

The switching value can be easily adjusted using the external adjustment knob, allowing flexible configuration for different operating conditions.

Key Features

Direct-mount mechanical flow switch
Explosion-proof design for hazardous areas
Spring-supported paddle mechanism
External knob for easy switching point adjustment
SPDT microswitch output (Normally Open + Normally Closed)
Suitable for water, oil, and gas
Excellent repeatability
Strong anti-contamination performance
Low pressure loss
Stainless steel wetted components
Stainless steel explosion-proof junction box
Reliable mechanical operation
Easy installation and maintenance

Technical Specifications

Parameter	Specification
Measuring Principle	Mechanical Paddle
Measuring Medium	Water, Oil, Gas
Setting Range	Refer to selection table
Repeatability	±2.5% of full range
Output	SPDT (Normally Open + Normally Closed)
Contact Rating	250 VAC, 3 A
Wiring Method	Terminal wiring
Maximum Working Pressure	100 bar
Average Pressure Loss	0.08 bar (at maximum flow)
Medium Temperature	Up to 250°C
Protection Rating	IP67

Materials

Component	Material
Main Body	Stainless Steel
Process Connection	Stainless Steel
Connecting Rod	Stainless Steel
Paddle	Stainless Steel
Housing	Stainless Steel Explosion-Proof Junction Box

Typical Applications

The Direct Explosion-Proof Flow Switch NK01BS is widely used in industries requiring reliable flow monitoring and explosion-proof protection, including:

Industrial automation
Mechanical equipment
Air compressor systems
Refrigeration and HVAC systems
Fire protection systems
Petrochemical plants
Hydraulic and lubrication systems
Pump protection
Cooling water circulation
Process control systems

Suitable for monitoring water, oil, and gas in hazardous industrial environments.

Product Advantages

Explosion-Proof Safety

Designed for hazardous industrial environments, the NK01BS combines a rugged stainless steel construction with an explosion-proof enclosure for safe and reliable operation.

Convenient Flow Adjustment

The external adjustment knob allows the switching point to be easily configured without complicated procedures, improving installation efficiency and reducing commissioning time.

Excellent Repeatability

The spring-supported mechanical mechanism provides stable and repeatable switching performance for long-term industrial use.

Low Pressure Loss

The optimized paddle design minimizes pressure drop while maintaining reliable flow detection.

Durable Stainless Steel Construction

All major wetted components are manufactured from stainless steel to provide excellent corrosion resistance and extended service life.

Frequently Asked Questions (FAQ)

How does the NK01BS flow switch work?

The NK01BS uses a spring-supported stainless steel paddle. When the flow reaches the preset value, the paddle mechanically actuates an internal SPDT microswitch. As the flow decreases, the spring automatically resets the switch.

What media can the NK01BS monitor?

The switch is suitable for:

Water
Oil
Gas

It is designed for industrial applications requiring reliable mechanical flow monitoring.

Can the switching point be adjusted?

Yes.

The NK01BS features an external adjustment knob, allowing the switching point to be set quickly and conveniently according to application requirements.

What output signal does the switch provide?

The switch provides an SPDT microswitch output, including:

Normally Open (NO)
Normally Closed (NC)

Contact Rating:

250 VAC, 3 A

Is the NK01BS suitable for hazardous areas?

Yes.

Its stainless steel explosion-proof housing makes it suitable for industrial environments where explosion-proof equipment is required.

What is the maximum operating pressure?

The maximum working pressure is 100 bar.

Does the flow switch require maintenance?

The NK01BS features a simple mechanical structure with excellent resistance to contamination. Under normal operating conditions, only periodic inspection and cleaning of the paddle are recommended.

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

The NOIKE-AH NK01BS combines direct installation, explosion-proof protection, adjustable switching, stainless steel durability, and dependable mechanical performance into one compact solution. Its excellent repeatability, low pressure loss, and robust construction make it an ideal choice for flow monitoring and equipment protection in industrial automation, petrochemical processing, HVAC, fire protection, and other demanding applications.