Technical Description: Kobold NKP-25013 Level Switch
The Kobold NKP-25013 is a compact and cost-effective plastic level switch designed for the point-level detection of liquids in small and medium-sized tanks. Engineered with high-grade Polypropylene (PP), this switch is highly resistant to a variety of industrial chemicals and detergents. Its primary role is to trigger an alarm or control a pump when a specific liquid level is reached, providing essential overflow or dry-run protection in water treatment, laboratory, and general manufacturing environments.
Mechanical Reliability and Sensing Logic
The NKP-25013 operates on the simple but effective float principle. A permanent magnet is integrated into the float; as the liquid level rises or falls, the float moves along the guide tube, triggering a hermetically sealed reed contact. This design ensures that the electrical switching element is completely isolated from the process medium, preventing corrosion and ensuring millions of reliable switching cycles. The unit can be easily converted from Normally Open (N/O) to Normally Closed (N/C) by simply rotating the float 180 degrees.
Key Characteristics
- Part Number: NKP-25013.
- Material: Polypropylene (PP).
- Mounting: Horizontal or vertical (depending on tank access).
- Connection: G 1/2 or NPT thread (Model dependent).
- Contact Type: Reed contact (N/O or N/C).
- Max Temperature: 80°C.
- Max Pressure: 10 bar at 20°C.
- Protection: IP65.
Industrial Applications
The NKP-25013 is widely utilized in the electroplating industry, chemical storage tanks, and large-scale industrial washing machines. Its lightweight plastic construction makes it ideal for mounting on plastic vessels where heavy metal sensors might cause mechanical stress. Because Polypropylene has excellent chemical compatibility, this switch can be used in media that would otherwise corrode standard brass or stainless steel sensors.
| Category | Specification |
| Switching Capacity | Max. 50 VA / 0.5 A |
| Density of Medium | Min. 0.6 g/cm³ |
| Cable Material | PVC |
Maintenance Insights
The NKP series is virtually maintenance-free due to the lack of mechanical linkage. However, in media with high particulate counts or crystallization tendencies, it is recommended to periodically check the float’s movement to ensure it is not restricted. Its small footprint allows for high-density installation in complex manifold tanks.
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