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Key Features: Side Mounting Level NK10

The NK10 Fill Level limiter, Float System by Fischer is a fill-level limiter contained within a fluid-filled reservoir (expansion tank). Float movements, caused by changes in fill levels, are directly transmitted to the S1 micro switch through a float rod sealed in a stainless-steel bellows. The fulcrum of the float rod is located outside the pressure chamber.

An external test button allows for functional checks as per DIN 4754-3 without lowering the fill level. When pressed, the float moves against its buoyancy. The factory-set switching point of the S1 micro switch activates when the float rod is in a horizontal position. The optional S2 warning switch activates approximately 2.5 mm before the S1 switch.

The fill level height triggering the switch depends on the density of the heat carrier. The minimum density for safe operation is 0.6 kg/dm³.
For a medium density of 1.0 kg/dm³, the switching level is approximately 60 mm below the center of the flange or connector.

Main Specifications: Side Mounting Level NK10

• SIL Compliance: Suitable for SIL-safe zones
• DNV Certification
• 1 or 2 Contacts Available

Applications and Benefits: Side Mounting Level NK10

The NK10 Level Limiter offers essential features for industrial applications:

• Thermal Stability up to 400°C: Ensures effective operation in high-temperature environments for process safety.
• Stainless Steel Components: All components in contact with the medium are stainless steel, providing corrosion resistance and long service life.
• Double-Wall Bellows: Incorporates a double-walled stainless-steel bellows for enhanced operational safety and reliability.
• Heat-Resistant Construction: Ensures consistent performance even under extreme conditions.
• External Test Button: Allows functional tests without system intervention, compliant with DIN 4754-3.
• Safety Certification: TÜV Süd certified according to EN 61508.