Product Overview

The NOIKE-AH Small explosion-proof Flow Switch NK600E is an intelligent thermal dispersion flow switch designed for reliable monitoring of liquid and gas flow in industrial pipelines. Featuring a maintenance-free design with no moving parts, it provides accurate flow detection, pump dry-run protection, and process monitoring in demanding industrial environments.

Its unique conical sensing probe minimizes the accumulation of scale, fibers, and impurities, ensuring stable performance even in contaminated media. The fully waterproof stainless steel housing and external adjustment knob allow quick switching-point configuration without opening the enclosure, improving safety and simplifying maintenance.

With a wide measuring range, multiple output options, and an integrated 6-LED flow indicator, the NK600E is suitable for applications in chemical processing, power generation, metallurgy, water treatment, food processing, and other industrial automation systems.

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Working Principle

The Small explosion-proof Flow Switch NK600E operates using the thermal dispersion principle.

The probe contains two integrated temperature sensors:

• A heated sensing element
• A reference temperature sensor

When no medium is flowing, the heated sensor maintains a constant temperature difference from the reference sensor. As the process medium flows past the probe, heat is carried away, causing the temperature difference to decrease.

The electronic controller continuously measures this temperature difference and converts it into a flow signal. When the flow reaches the preset switching point, the device outputs a switching or analog signal for process monitoring, pump protection, or alarm control.

This measuring principle eliminates mechanical wear, ensuring excellent reliability, fast response, and long service life.

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Product Features

• Thermal dispersion sensing with no moving parts
• Unique conical probe minimizes scaling and fiber entanglement
• Fully waterproof stainless steel housing
• External adjustment knob for easy switching-point setting
• Wide pipe diameter compatibility
• Suitable for liquids, oils, and gases
• 6-LED flow indicator for real-time flow status
• PNP, NPN, relay (SPDT), and analog output options
• Integrated switch and analog output available
• High pressure resistance up to 100 bar
• Reverse polarity, overload, and short-circuit protection
• Compact design with simple installation
• Maintenance-free operation
• Excellent repeatability of ±2%

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Technical Specifications

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Typical Applications

The Small explosion-proof Flow Switch NK600E is designed for continuous flow monitoring and equipment protection in a wide range of industrial applications.

Oil & Gas

• Pipeline flow monitoring
• Pump dry-run protection
• Lubrication systems
• Cooling circuits

Chemical & Petrochemical

• Chemical process monitoring
• Corrosive liquid detection
• Hazardous-area applications

Power Generation

• Cooling water systems
• Boiler circulation
• Heat exchanger protection

Water & Wastewater

• Pump protection
• Filtration systems
• Process water monitoring

Steel & Metallurgy

• Cooling water circulation
• Hydraulic lubrication systems

Food & Beverage

• Process water
• Cooling systems
• CIP cleaning equipment

Paper Industry

• Lubrication systems
• Cooling water monitoring
• Process flow control

Industrial Automation

• Pneumatic systems
• Hydraulic systems
• Machine tools
• Cutting fluid monitoring
• Lubricating oil monitoring

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Installation & Safety Notes

For optimum performance and long service life:

• Verify the product model and specifications before installation.
• Confirm the correct power supply voltage and wiring before energizing the device.
• Never install or disconnect the sensor while the power is on.
• Use an appropriate hex wrench during installation to avoid damaging the thread or housing.
• Do not overtighten the sensor.
• If abnormal operation occurs, contact qualified service personnel rather than attempting unauthorized repairs or calibration.
• Install the sensor according to the recommended flow direction for maximum measurement accuracy.

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Advantages

Compared with conventional paddle or mechanical flow switches, the NK600E provides:

• Maintenance-free operation with no moving components
• Superior resistance to contamination and scaling
• Reliable operation in harsh industrial environments
• Wide measuring range for liquids and gases
• Visual flow indication through integrated LED display
• Fast response with high repeatability
• Easy installation and switching-point adjustment
• Long operational life with minimal maintenance

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Why Choose the NOIKE-AH Small explosion-proof Flow Switch NK600E?

The NOIKE-AH Small explosion-proof Flow Switch NK600E combines advanced thermal dispersion technology, robust stainless steel construction, and intelligent flow monitoring into a compact industrial solution. Designed for continuous process monitoring and equipment protection, it delivers accurate flow detection, reliable switching performance, and long-term maintenance-free operation across demanding industries such as oil & gas, chemical processing, power generation, water treatment, metallurgy, and food manufacturing.