Technical Characteristics and Ease of Use
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Smallest Vibronic Sensor: Its exceptionally small footprint allows for installation in the tightest spaces where traditional level switches cannot fit. This is particularly valuable for machine builders (OEMs) designing compact cleaning or cooling systems.
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Plug & Play Connectivity: The FTL31 is a true “install and forget” sensor. It requires no calibration or special software for commissioning. The device is ready for operation immediately upon installation, regardless of whether the liquid is water, oil, or a cleaning agent.
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IO-Link Integration: As a smart sensor, it supports IO-Link communication. This allows for easy parameter setting, remote configuration, and enhanced diagnostic data, significantly reducing complexity and costs during integration into modern automation architectures.
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Continuous Self-Monitoring: Despite its small size, the FTL31 offers high operational safety. It continuously monitors its own frequency and electronics, ensuring a safe switching state even in the event of a power supply loss or internal fault.
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Robust Stainless Steel Design: Constructed from 316L stainless steel, the sensor features a modular design that can withstand pressures up to 40 bar and temperatures up to 150°C. With no mechanically moved parts, it is completely free of maintenance.
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Reliable Measurement: The switching point remains accurate and stable. It is completely unaffected by the liquid’s conductivity, dielectric constant, foam, or flow velocity.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Vibronic (Tuning Fork) |
| Device Design | Compact stainless steel housing |
| Process Temperature | -40 to +150°C (-40 to +302°F) |
| Process Pressure | -1 to +40 bar (-14.5 to 580 psi) |
| Surface Roughness | 3.2 µm |
| Output Signal | DC-PNP, IO-Link |
| Safety & Compliance | WHG Overfill Protection, Marine Approvals |
Primary Applications
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Pump Dry-Run Protection: Preventing pump damage in cleaning and filtration systems by detecting the absence of liquid in the suction line.
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Overfill Prevention: Acting as a reliable high-level alarm in small process tanks and storage containers.
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Leakage Detection: Detecting the presence of liquids in collection trays or double-walled pipes to meet WHG environmental requirements.
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Machinery Industry: Ideal for cooling lubricant tanks, hydraulic oil reservoirs, and industrial washing machines.
