Liquicap FMI51 Capacitive level Measurement is an Ideal Solution

Measuring Principle:
Capacitive
Accuracy:
Repeatability: ±0.1%
Linearity Error for Conductive Liquids: <0.25%
Max Measurement Distance:
0.1 m to 4.0 m (0.3 ft to 13 ft)
Process Temperature:
-80°C to 200°C (-112°F to 392°F)
Process Pressure:
Vacuum to 100 bar (Vacuum to 1450 psi)
Ambient Temperature:
-50°C to +70°C (-58°F to +158°F)
Main Wetted Parts:
Insulation materials: PTFE, PFA
Stainless steel: 316L
Field of Application
The Liquicap FMI51 is designed for continuous level monitoring of liquids, especially in applications involving build-up forming media and extreme temperature conditions. The system operates independently of the dielectric constant for liquids with a conductivity of 100μS/cm or higher, allowing for versatile usage without recalibration.

Level monitoring in storage tanks and process vessels
Integration with Fieldgate FXA320 for remote measured value interrogation

Safety Compliance:
Suitable for use in safety systems requiring functional safety to SIL2 as per IEC 61508.
Wide Range of Approvals:
Numerous international explosion protection certificates, overfill prevention WHG, and hygienic certificates ensure reliable operation across various applications.
No Calibration Needed:
Factory preconfiguration eliminates the need for recalibration for conductive liquids.
Durable Materials:
Corrosion-resistant and FDA-listed materials ensure long-term reliability and safety.
User-Friendly Configuration:
Optional menu-guided local configuration with a plain text display.
Overvoltage Protection:
Two-stage overvoltage protection enhances device longevity.
Design and Installation:
Process Connections: Flanges and threads, including G1/2, G3/4, G1, G1 1/2, NPT options, and hygienic connections like Tri-Clamp ISO02852.
Inactive Length:
Maximum inactive length of 2 m (7 ft) with a total sensor length of 6 m (20 ft).
Special Features:
Factory calibrated with a short response time upon changes in measured values.
Supply and Communication:
Supply Voltage: 12-36 V DC
Communication Protocols:
4…20 mA HART, PFM

Explosion Protection:
ATEX, FM, CSA, IEC Ex, TIIS, INMETRO, NEPSI, EAC
Safety Approvals:
SIL compliance
Hygienic Approvals:
3A, EHEDG
Marine Approvals:
GL, ABS, DNV
Application Limits:
Restrictions: Not suitable for insufficient clearance toward ceilings or changing, non-conductive media with conductivity < 100 μS/cm. Users should be aware of pressure and temperature derating.
The Liquicap FMI51 is a robust and versatile solution for continuous level monitoring in challenging industrial environments, with strong compliance to safety standards and a variety of application-specific features.

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