Technical Data Sheet: SIKA Flow Switch (VHS15M)
1. General Specifications
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Manufacturer: SIKA Dr. Siebert & Kühn GmbH & Co. KG
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Model/Article Number: VHS15M01171I31
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Type: Paddle-type flow switch (Magnetically triggered)
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Origin: Made in Germany
2. Operating Limits & Ratings
| Feature | Specification |
| Max. Voltage/Current (AC) | 230V / 1A / 26VA |
| Max. Voltage/Current (DC) | 48V / 1A / 20W |
| Max. Pressure (PN) | 25 bar (approx. 362 PSI) |
| Max. Temperature ($T_{max}$) | $110^\circ C$ ($230^\circ F$) |
| Switching Function | Reed contact (Normally Open/Contact closes on flow) |
3. Flow Setpoints
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Setpoint (Increasing flow): 3.0 – 3.8 l/min
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Function: The internal paddle is deflected by the flowing medium. As the paddle moves, a magnet triggers a reed switch located in the plastic housing.
4. Physical Construction
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Body Material: Brass (CW617N)
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Paddle Material: Stainless steel or high-grade plastic (internal)
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Process Connection: Threaded pipe section (likely G $1/2$ or G $3/4$ based on the VHS15 designation)
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Electrical Connection: DIN 43650-A connector (the black L-shaped plug)
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Protection Class: Typically IP65 (dust-tight and protected against water jets)
Installation Notes
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Directional Flow: Ensure the arrow on the brass body matches the direction of the fluid flow.
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Orientation: For the most accurate setpoint, the device should be installed in a horizontal pipe with the plastic switching head pointing upwards.
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Straight Pipe Runs: To avoid turbulence, it is recommended to have at least 5x pipe diameter of straight pipe before and after the switch.
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