Relay NPN PNP Compact Thermal Liquid Gas Flow Switch for Industrial Use

• Customization: Available
• After-sales Service: 12 Months
• Warranty: 12 Months
• Model NO.: HFM500
• Accuracy: ±0.6-1%
• Main Application: Water, Wastewater, Diesel Fuel, Fuel Oil, Corrosive Liquid/Gas
• Size: DN10-50
• Sensor: Plug-in
• Application: Industrial Production
• Type: Thermal Sensor
• Measuring Media: Liquid, Air,Gas
• Measuring Principle: Thermodynamic
• Measurement Object: Closed Pipeline
• Certification: JIS, DIN, ANS, GB, CE, ISO
• Switch Type: Relay, NPN, PNP
• Probe Material: SS304, SS316L/Ta Can Be Customized
• Process Connection: 1/2" 3/4" 1" Thread
• Tri-Clamp: 50.5mm
• Transport Package: Carton, Wooden Case
• Specification: SS304
• Trademark: HIGHJOIN
• Origin: China
• HS Code: 9026100000

Product Description

Product Description

The HFM500 thermal flow switch is ingeniously engineered on the principle of thermal diffusion. This sophisticated mechanism utilizes the temperature differential between dual sensors as the core indicator for detecting flow rates. As the medium's flow rate intensifies, the temperature differential diminishes, and conversely, it expands when the flow rate lessens. Through refined processing, this temperature variance is expertly transformed into a standardized electrical signal output, complete with a clear and intuitive display.

Product Features

1. Crafted with an all-metal shell design, this model boasts a maintenance-free experience with its absence of moving parts, ensuring a seamless installation process.
2. A versatile model adeptly accommodates diverse pipe diameter specifications. Its switching value is designed for continuous adjustability, offering precision and flexibility.
3. Experience minimal pressure loss with this advanced design.
4. Featuring a compact structure, it includes an intuitive 6-LED display that vividly illustrates flow trends and switching statuses, enhancing operational clarity.

Product Parameters

Measuring Range	Water: 1...150cm/s (Most sensitive range 1...60cm/s)
	Oil: 3...300cm/s (Most sensitive range 3...100cm/s)
	Air: 20...2000cm/s (Most sensitive range 20...700cm/s)
Measuring Medium	Water, Oil, Air
Withstand Pressure	100bar
Supply Voltage	24VDC
Output type	PNP/NPN/ Relay Optional
Operating Temperature	-20~80ºC
Probe Material	SUS304
Protection Grade	IP67
Wiring Method	M12 Connector

Dimensions (Unit:mm)

How to adjust the flow ?

1. To adjust the flow, initiate by installing the flow switch, carefully removing the protective screw, and setting the medium to flow at the desired monitoring rate.
2. Fine-tune the potentiometer until the first green LED lights up precisely, indicating the optimal adjustment.

The switch is designed to release seamlessly when the flow rate descends below the current set value.
For a switch point that registers below the current flow rate, continue adjusting the potentiometer until additional green LEDs illuminate, signifying a finer calibration.

Ordering Guide