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Measurement Method
Vibration-based Liquid Detection
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Features & Applications
NAMUR-compliant switching unit for rail mounting
SIL2 certified per IEC 61511
Intrinsically safe design -
Power Supply
NAMUR interface
24V AC/DC or 230V AC -
Operating Temperature
Standalone installation:
-20°C to 60°C
(-4°F to 140°F)
Rail-mounted:
-20°C to 50°C
(-4°F to 122°F) -
Output Configuration
1-channel: 1 level SPDT + 1 alarm SPST
3-channel: 3 level SPDT + 1 alarm SPST -
Certifications
ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, EAC
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Safety Certifications
WHG-compliant overfill protection
SIL-rated
Application Scope
The Nivotester FTL325N serves as a switching unit for precise liquid level detection in tanks, including hazardous environments. It provides effective overfill prevention for both flammable and non-flammable liquids that pose water contamination risks. The device offers two-point control and single-point level monitoring, making it ideal for safety-critical systems requiring SIL2 functional safety compliance per IEC 61508/61511 standards when used with Liquiphant electronic inserts FEL56 or FEL58.
NAMUR-compatible switching unit available for both rail and standalone mounting.
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Operating temperature range: -20°C to +50°C (-4°F to +122°F)
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Global explosion protection certifications, WHG overfill prevention, marine approvals
Key Advantages
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Supports connection of 1-3 measuring cells (1-, 2-, or 3-channel configurations)
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Ex ia intrinsically safe circuits for hazardous area operation
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Line monitoring ensures SIL2 functional safety compliance
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Compact DIN rail housing for easy cabinet installation
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Quick wiring with removable terminal blocks
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NAMUR interface compliant with EN 50227 (DIN 19234) and IEC 60947-5-6 for sensor integration
