Vibronic Point Level Switch Liquiphant FTL81

Application

The Liquiphant FTL81 is a point level switch designed for use in hazardous environments and is certified with all major international approvals. It provides FailSafe overfill protection, supporting functional safety applications up to SIL3 with a single device. It delivers reliable measurements, unaffected by factors such as changing media properties, flow variations, turbulence, gas bubbles, foam, vibration, or build-up.

It is ideal for liquid level detection in SIL3 safety systems.

Key specifications:

• Process connections: Available in threaded and flanged versions
• Operating temperature range: -60°C to +280°C (-76°F to +540°F)
• Pressure range: -1 to +100 bar (-14.5 to +1,450 psi)
• Sensor length: Extension pipes available up to 3 meters (9.8 feet)
• Sensor material: 316L stainless steel, Alloy C

It is compliant with international explosion protection standards, WHG overfill protection, SIL, and marine certifications.

Benefits

The Liquiphant FTL81 is designed for safety-critical systems requiring up to SIL3 certification, in accordance with IEC 61508 Ed.2.0/ IEC 61511-1/ISA 84-1, and DIN EN ISO 13849 standards.

• Proof testing intervals extend up to 12 years, with easy testing of slave devices via a button press.
• The device features continuous self-monitoring and internal redundancy to ensure reliability.
• Easy integration is enabled through its 4-20mA interface (per NAMUR NE 06/NE 43), either via the Nivotester FailSafe FTL825 switching unit, which offers a two-channel safety contact output and a locking function, or directly into a safety PLC.
• The device requires no adjustments for setup, allowing for a fast and cost-effective startup process.
• Its design includes no moving mechanical parts, resulting in no maintenance requirements, no wear, and a long service life.
• It continuously monitors for issues such as fork damage, corrosion, build-up, or mechanical blockages.

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