NOIKE-AH Intelligent Thermal Flow Switch

Intelligent Thermal Flow Switch with Temperature Monitoring | Color Display Flow Sensor

Brand: NOIKE-AH
Range:‌ NK220

Specification

Product Overview

The NOIKE-AH Intelligent Thermal Flow Switch is a compact, maintenance-free flow monitoring solution that combines flow detection and temperature measurement in one device. Based on advanced thermal dispersion technology, it accurately measures the flow of liquids and gases while providing real-time temperature monitoring, programmable switching outputs, and remote signal transmission.

Designed with no moving parts, a 0.96-inch color LCD display, and multiple output options including PNP, NPN, IO-Link, 4–20 mA, and 1–5 V, it is an ideal solution for industrial automation, pump protection, hydraulic systems, and cooling circuits.

Key Features

Thermal dispersion flow measurement technology
Integrated flow and temperature monitoring
Suitable for liquids, gases, and gas-liquid applications
No moving parts for maintenance-free operation
Compatible with multiple pipe diameters using a single model
Extremely low pressure loss
0.96-inch color LCD for flow trend and switching status
Built-in temperature measurement with alarm function
Remote monitoring capability
User-friendly button configuration
IP67 protection for harsh industrial environments

Working Principle

The flow switch operates using the thermal dispersion principle.

Inside the sealed sensing probe are two precision resistors:

Heated resistor, which functions as the sensing element
Reference resistor, which remains at the medium temperature

As fluid flows past the probe, heat is carried away from the heated resistor, causing its resistance to change. The electronics continuously compare the resistance difference between the heated and reference resistors to calculate the flow velocity and determine the switching status.

This non-mechanical measuring principle provides stable performance, fast response, and long service life without mechanical wear.

Technical Specifications

Parameter	Specification
Measuring Principle	Thermal Dispersion
Suitable Media	Water, Oil, Gas, Gas-Liquid Applications
Flow Range	0.01–2.0 m/s (Water)
Medium Temperature	0–100°C
Ambient Temperature	-20 to +80°C
Storage Temperature	-20 to +80°C
Temperature Accuracy	±1.5°C (Probe immersed in medium)
Power Supply	24 VDC ±20%
Maximum Switching Current	200 mA (PNP/NPN)
Current Consumption	<100 mA
Display	0.96-inch Color LCD
Configuration	Button Setting
Pressure Rating	100 bar
Response Time	1–13 s (Typical 2 s)
Electrical Protection	Reverse polarity, short circuit, overload protection
Protection Rating	IP67
Connection	M12 Connector

Output Signals

Flow Output

PNP
NPN
IO-Link
4–20 mA
1–5 V

Temperature Output

PNP
NPN
IO-Link
4–20 mA
1–5 V

Materials

Component	Material
Housing	Stainless Steel / Engineering Plastic
Wetted Parts	316L Stainless Steel / EPDM

Typical Applications

The intelligent thermal flow switch is suitable for:

Low-flow alarm systems
Pump dry-run protection
Hydraulic systems
Pneumatic systems
Cooling water systems
Lubrication systems
Cutting fluid monitoring
Industrial process automation
General liquid and gas flow monitoring

Product Advantages

Simultaneous flow and temperature monitoring
Maintenance-free operation with no moving parts
One model fits multiple pipe sizes
Compact design saves installation space
Color LCD provides intuitive operating status
Multiple industrial output options
Supports remote monitoring and temperature alarms
Fast response with high reliability
Easy installation and configuration
Suitable for demanding industrial environments

Installation Recommendations

For optimal performance:

Install according to the indicated flow direction.
Ensure the sensing probe is fully immersed in the process medium.
Connect the device using the M12 connector.
Supply power within the specified 24 VDC ±20% range.
Configure flow and temperature parameters before commissioning.
Clean the sensing probe periodically when used with contaminated media.

Industries Served

Industrial Automation
Machinery Manufacturing
Hydraulic Equipment
Pneumatic Systems
HVAC
Chemical Processing
Water Treatment
Food & Beverage
Pharmaceutical Manufacturing
Energy & Utilities
Process Control

Frequently Asked Questions (FAQ)

What measuring principle does this flow switch use?

It uses the thermal dispersion principle, comparing the temperature difference between a heated resistor and a reference resistor to determine flow velocity.

Can it measure both flow and temperature?

Yes. The device integrates flow monitoring and temperature measurement, with support for temperature alarms and remote monitoring.

What types of media are supported?

It is compatible with water, oil, gases, and other compatible liquid or gas applications.

What output options are available?

The flow and temperature outputs support PNP, NPN, IO-Link, 4–20 mA, and 1–5 V.

Does the device require regular maintenance?

No. Since it has no moving parts, routine mechanical maintenance is unnecessary. For contaminated media, periodic cleaning of the probe is recommended.

Is it suitable for pump protection?

Yes. It is widely used for low-flow detection, flow interruption monitoring, and pump dry-run protection.

What is the protection rating?

The device has an IP67 protection rating for reliable operation in demanding industrial environments.

Can the specifications be customized?

Yes. Certain specifications and configurations can be customized to meet specific application requirements.

Why Choose the NOIKE-AH Intelligent Thermal Flow Switch?

The NOIKE-AH Intelligent Thermal Flow Switch combines thermal dispersion flow measurement, integrated temperature monitoring, a color LCD display, and flexible industrial outputs into one compact, maintenance-free device. Its high reliability, low pressure loss, and support for IO-Link, analog outputs, and programmable switching signals make it an ideal choice for industrial automation, equipment protection, and modern process control systems.