The thermal flow switch is designed for in-line or insertion installation in pipelines carrying water, gas, or oil. It monitors flow in real-time, triggering an alarm signal when the flow rate exceeds or drops below a set point, helping to prevent issues like equipment "dry burn."
Based on the thermal principle, the switch contains two resistors inside a sealed probe. One is heated as the sensing resistor, and the other serves as a reference. As the flow changes, the sensor detects the temperature difference and converts it into an electrical signal. When the flow rate reaches the preset point, the switch outputs a signal to control the system.
Product Features
Minimal pressure loss: Ensures efficient flow monitoring with almost no impact on system pressure.
Multiple material options: Available in multiple materials to suit different media and environments.
Complete insulation: The mechanical and electronic components are completely insulated, making it ideal for low-flow applications with cost-effective performance.
High-precision settings: Features an adjustable on/off scale, eliminating the need for on-site user adjustments.
Status LED indicator: Provides a clear visual indication of switching status with dual switching outputs for enhanced functionality.
Instrument Parameters
Accuracy: ±5% of total volume
Hysteresis: Minimum 0.5 L/min, depending on switching point
Switching configuration scale:
Calibrated in horizontal installation using water at 20°C.
Switching values may vary slightly due to mounting position, medium, and temperature.
LED Screen:
Models with direct current (DC) power supply have an LED display for the switching state.
Models with AC power supply do not include LED display.
Wiring method: Connectors, Hirschmann connectors, direct output
Output: Reed switch, 24VDC/250VAC capacity, 100mA
Materials:
Cell: Silicone
Piston: Plastic POM
Type: Stainless Steel
Pressure resistance:
50 bar (aluminum type)
100 bar (stainless steel type)
Average pressure loss: 0.3 bar at 25 L/min
Medium Temperature: Maximum 90°C
Protection class: IP65
Note: The mounting position affects the switching values.
