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HFM500 PNP/NPN/ Relay SPDT DPDT Thermal Flow Switch

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HFM500 thermal flow switch adopts the principle of thermal diffusion. The temperature difference between the two sensors can be used as the basis for measuring the flow rate. When the flow rate of the medium increases, the temperature difference decreases and vice versa. After processing, the temperature difference value is converted into standard electrical signal output and displayed.

Product Description

Features

Technical Parameters

HFM500 thermal flow switch adopts the principle of thermal diffusion. The temperature difference between the two sensors can be used as the basis for measuring the flow rate. When the flow rate of the medium increases, the temperature difference decreases and vice versa. After processing, the temperature difference value is converted into standard electrical signal output and displayed.

Features

All-metal shell design, no moving parts, maintenance-free and easy to install.
One model is suitable for various pipe diameter requirements. The switching value is continuously adjustable.
Pressure loss low
Compact structure. 6-LED displays flow trend and switching status.

Technical 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
Initialization Time	8s
Response Time	1...15s, related to thermal conductivity of medium, typical value 2s
Supply Voltage	24VDC
Output type	PNP/NPN/ Relay Optional
Operating Temperature	-20～80℃
Medium Temperature	-20～80℃
Probe Material	SUS304
Wiring Method	M12 Connector