Technical Characteristics and Material Versatility
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Flexible Output Options: The FTS20 is available with two distinct electrical outputs:
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Change-over contact: A universal AC/DC switch for standard industrial applications.
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NAMUR signal: Specifically designed for use in hazardous areas (up to Zone 1) when connected to an isolating amplifier.
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Media-Specific Materials: To ensure high safety and chemical compatibility, the float and cable can be ordered in various materials:
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PP (Polypropylene) or PVC: For standard water and wastewater.
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PUR (Polyurethane) or CSM (Chlorosulphonated Polyethylene): For oily or aggressive liquids.
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Simple Installation: Its small diameter allows for easy mounting through a standard G 1 A tapped hole. The switching point is determined simply by the length of the cable and the point at which it is secured.
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Robust Mechanical Principle: With no complex electronics in the sensor head, the FTS20 is highly resistant to interference and mechanical shocks, providing a long service life with minimal maintenance.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Float switch (Mechanical tilt) |
| Output | Change-over contact or NAMUR |
| Process Temperature | -20 to +70 °C (-4 to +158 °F) |
| Process Pressure | Max 3 bar (43.5 psi) |
| Mounting | G 1 A tapped hole or suspension |
| Protection Class | IP 68 |
| Certificates | ATEX, FM, CSA (Hazardous areas) |
Primary Applications
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Sewerage Treatment Plants: Level detection in open basins and sumps to manage pump cycles.
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Overfill Prevention: A safety limit switch for storage tanks to prevent accidental spills.
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Pump Dry-Run Protection: Ensuring pumps do not run when the liquid level falls below a critical minimum.
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Oily and Aggressive Media: Reliable switching in industrial sumps containing lubricants or mild chemicals.
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Small Vessels: Due to its compact design, it is suitable for smaller tanks where space for larger level sensors is limited.
