Working Principle
The SHI Series Hot Flow Switch is based on the thermal principle. Inside the sealed probe, there are two platinum thermal resistors. One resistor is heated and used as the detection resistor, while the other is not heated and works as the reference resistor. When the medium begins to flow, heat is taken away from the heated resistor, causing its resistance value to change. The difference between the two resistor values is then used as the basis for judging the flow rate.
Technical Characteristics
No moving parts, maintenance-free, easy installation.
One model is suitable for a variety of pipe diameters.
The switching quantity is continuously adjustable.
LED display shows flow trend and switching status.
Suitable for both gas and liquid applications.
Technical Parameter
| Setting Range | 1~150 cm/s (Water) |
| 3~300 cm/s (Oil) | |
| 30~2000 cm/s (Air) | |
| Signal Output | PNP, NPN, 4~20mA, SPST |
| Power Supply Voltage | 24VDC |
| Operating Temperature | -20~80°C (High Temperature Max. -20~130°C) |
| Working Pressure | 1.0MPa |
| Flow Indicator | LED Lights (6) |
| Setting Mode | Manual Adjustable |
| Connection Mode | M12 Connector (With 2 Meters Wire) |
Typical Application
Pneumatic Systems
Hydraulic Systems
Circulating Water Monitoring
Cutting Fluid Detection
Lubricating Oil Cut-Off Detection
Pump Idling Protection
Product Type
Product Selectiom Table
