Key Specifications
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Operating Temperature
-60°C to +280°C
(-76°F to +540°F) -
Operating Pressure / Maximum Overpressure Limit
Vacuum to 100 bar
(1450 psi) -
Minimum Media Density
Density from 0.4 g/cm³
(0.4 SGU)
Application
The Liquiphant FTL81 is a level switch designed for hazardous areas with international certifications. It provides overflow protection with functional safety up to SIL3. Delivers stable readings unaffected by: media property changes, flow, turbulence, gas bubbles, foam, vibrations, or deposits.
Liquid level switch certified up to SIL3.
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Process connection: threaded and flanged versions
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Temperature range: -60 to +280°C (-76 to +540°F)
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Pressure range: -1 to +100bar (-14.5 to +1,450psi)
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Sensor length: extension tube up to 3m (9.8ft)
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Sensor material: 316L, alloy C
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International explosion protection certifications, WHG overflow protection, SIL, marine approvals
Advantages
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Use in safety systems requiring SIL3 according to IEC 61508 Ed.2.0/ IEC 61511-1/ISA 84-1 and DIN EN ISO 13849
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Proof test interval: up to 12 years, subordinate device testing via push-button
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Continuous self-monitoring/internal redundancy
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4-20mA interface (per NAMUR NE 06/NE 43): simple connection via switching block (Nivotester FailSafe FTL825) with dual-channel output (safety contacts) and lock function or direct connection to safety PLC
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No calibration needed: quick and cost-effective commissioning
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No moving mechanical parts: maintenance-free, no wear, long service life
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Probe condition monitoring for damage, corrosion, deposits, and mechanical blockages
