Technical Characteristics and Chemical Safety
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Coated for Aggressive Environments: The FTL85 features specialized coatings—Enamel, ECTFE (Halar), and various PFA materials—to protect the sensor from highly corrosive media. This ensures that the safety integrity of the device is maintained even in the harshest chemical processes.
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Single-Device SIL3 Integrity: Developed to meet SIL3 standards with a 1oo1 architecture, the FTL85 utilizes internal redundancy and constant self-monitoring. It is designed to detect any internal failure immediately and transition to a safe state, providing the highest level of overfill protection.
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Advanced Fork Monitoring: The device does not merely detect level; it actively monitors the condition of the coated tuning fork. It can identify mechanical damage, corrosion of the coating, or mechanical blocking, ensuring the sensor’s health is never in doubt.
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12-Year Proof Test Interval: Thanks to its robust internal diagnostics, the FTL85 supports extended proof testing intervals of up to 12 years. This significantly reduces maintenance costs and minimizes the need for personnel to interact with hazardous chemical storage areas.
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Second Line of Defense: As standard, the device includes a gas-tight feedthrough. This secondary seal prevents aggressive or toxic process media from escaping into the electronics housing or the environment if the primary sensor diaphragm is damaged.
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Seamless Integration: Using a 4-20mA interface (NAMUR NE 06/NE 43), the FTL85 integrates easily with the Nivotester FailSafe FTL825 switching unit or directly into a safety PLC for high-integrity safety loops.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Vibronic (Tuning Fork) |
| Safety Integrity Level | SIL3 (Single device 1oo1) |
| Coating Options | Enamel, ECTFE, PFA |
| Process Temperature | -50 to +150°C (-76 to +300°F) |
| Process Pressure | -1 to +40 bar (-14.5 to +580 psi) |
| Sensor Length | Extension pipe up to 3m (9.8ft) |
| Output Signal | 4-20mA (NAMUR NE 06 / NE 43) |
| Safety & Compliance | SIL3, WHG, ATEX, IECEx |
Primary Applications
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Aggressive Chemical Overfill Protection: Serving as a SIL3 safety barrier in tanks containing strong acids, alkalis, or reactive chemical agents.
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Toxic Liquid Monitoring: Utilizing the FailSafe design and chemical coatings to monitor levels of hazardous substances where a leak or spill is unacceptable.
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Corrosive Process Vessels: Reliable point level detection in chemical reactors or mixing tanks with high concentrations of corrosive media.
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Remote Hazardous Storage: Ideal for chemical storage sites where the 12-year proof test interval provides a major operational advantage and increases safety.
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Environmental Safety Loops: Complying with WHG regulations for the storage of water-polluting liquids in highly corrosive environments.
