Description

Endress+Hauser Point level sensor FTL31 AA403AAW5J

Reliable Point Level Sensor

The Endress+Hauser Liquiphant FTL31 AA403AAW5J Point level sensor delivers safe and accurate point level detection for liquids. This compact tuning fork sensor protects tanks, vessels, and pipelines from overfill and dry running.

Engineers choose the FTL31 for dependable switching in demanding industrial environments.

Proven Tuning Fork Technology

The Liquiphant FTL31 uses a robust vibrating tuning fork measuring principle. It detects liquids reliably regardless of conductivity, buildup, foam, turbulence, or air bubbles.

This technology outperforms float, capacitive, conductive, and optical sensors in challenging conditions.

The device measures density above 0.7 g/cm³, with an optional 0.5 g/cm³ version available.

Point level sensor is Ideal for Overfill and Pump Protection

Install the FTL31 in cleaning systems, filter units, cooling circuits, and lubrication vessels. It prevents tank overfill and protects pumps from dry running.

The sensor operates safely with two selectable modes. Choose MAX mode for overfill prevention. Choose MIN mode for dry-run protection.

The electronic switch reacts immediately if the level limit is reached or if power fails.

High Temperature Capability

The Liquiphant FTL31 handles process temperatures up to 100°C as standard. It also supports applications up to 150°C.

This flexibility supports a wide range of industrial processes.

Flexible Electrical Configurations

Select from 3-wire DC-PNP (10 to 30 V DC) or 2-wire AC/DC (20 to 253 V AC/DC) versions. The switching capacity reaches up to 200 mA for DC-PNP and 250 mA for AC/DC.

Choose M12 plug, valve plug, or cable connection to match your installation. An optional M12x1 plug offers IP69 protection for demanding washdown areas.

Compact and Easy to Install

The stainless steel 316L housing ensures durability and corrosion resistance. The compact design fits easily into confined or hard-to-access spaces.

An integrated LED provides clear onsite function indication. Perform quick function tests using a test magnet without removing the device.

Point level sensor features Reliable Performance Characteristics

The switch point measures 13 mm ± 1 mm in vertical installation. Hysteresis remains below 3 mm for precise control.

Switching delay options range from 0.2 s to 5 s. Standard delay equals 0.5 s when covered and 1 s when uncovered.

Measurement accuracy remains within ±2 mm according to DIN 61298-2. Ambient temperature influence remains negligible.