Product Overview: Kobold PSR-11258R25R8 Flow Switch
The Kobold PSR-11258R25R8 is a robust, paddle-type flow switch designed for the precise monitoring of liquid media in industrial piping systems. As part of the globally recognized PSR series, this device operates on the principle of a spring-loaded paddle that is displaced by the flow of the medium. Its reliable mechanical design makes it an essential component for protecting pumps against dry running and for monitoring cooling circuits in heavy machinery.
Technical Specifications and Performance
This specific model features a G 1 (1 inch) process connection and a durable brass housing (designated by the ‘8’ in the part number). The PSR-11258R25R8 is engineered to provide high repeatability and low pressure drop. The switching point is determined by the paddle size and the spring tension, which can be factory-preset or adjusted on-site to meet specific application requirements. It utilizes a high-quality reed contact for signal output, ensuring millions of switching cycles without mechanical wear.
Key Characteristics
- Part Number: PSR-11258R25R8.
- Connection: G 1 female thread.
- Housing Material: Brass (Ms 58).
- Max Pressure: 250 bar (Brass version).
- Max Temperature: 110°C.
- Contact Type: Bistable reed contact (NO, NC, or SPDT).
- Protection: IP65.
Operational Advantages
The PSR series stands out for its «Universal Mounting» capability, allowing the unit to be installed in horizontal or vertical pipe runs. Its simple yet effective design minimizes maintenance needs. The brass construction offers excellent resistance to corrosion in water-based applications, while the high-pressure rating ensures safety in pressurized hydraulic systems. The magnetic coupling between the paddle and the contact ensures that the electrical circuit is completely isolated from the process medium.
| Feature | Detail |
| Switching Hysteresis | Approx. 10% of flow rate |
| Medium | Water and other non-aggressive liquids |
| Orientation | Independent (Adjustable paddle) |
Frequently Asked Questions
Can it be used for oil? Yes, the PSR series is compatible with various oils; however, viscosity must be considered for accurate switching points. Is it suitable for outdoor use? With an IP65 rating, it is protected against dust and water jets, making it suitable for sheltered outdoor installations.
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