Endress+Hauser Levelflex FMP54 Guided Wave Radar Level Transmitter (Extreme High Temp & Pressure, Liquid Ammonia, Steam Boiler)

Levelflex FMP54 is a high‑precision guided wave radar level transmitter for extreme process conditions, specially designed for ultra‑high temperature, ultra‑high pressure, toxic media such as liquid ammonia, and steam boilers.

It features ceramic‑graphite seal and hermetic feedthrough to ensure safe and stable operation from -196～+450℃ and vacuum up to 400bar.

With gas phase compensation, FMP54 delivers accurate measurement even in high‑pressure applications with gas blankets, unaffected by level fluctuations, foam or medium changes. It supports both level and liquid‑liquid interface measurement with rod, cable and coaxial probe options.

Equipped with HistoROM, multi‑echo tracking and Heartbeat Technology, it complies with IEC 61508 SIL3, supports Bluetooth® and SmartBlue App, and integrates seamlessly into control systems. Widely used in oil, petrochemical, chemical, boiler and offshore applications.

• For extreme conditions: -196～+450℃, vacuum～400bar
• Ceramic‑graphite seal & hermetic feedthrough for liquid ammonia, steam boilers
• Exclusive gas phase compensation for accurate measurement in high‑pressure gas blankets
• Simultaneous level & liquid‑liquid interface measurement
• Immune to fluctuations, foam, medium, temperature & pressure
• Rod / Cable / Coaxial probes available, up to 45m
• HistoROM data storage for fast commissioning & diagnostics
• Multi‑echo tracking for high reliability
• SIL3 safety integrity according to IEC 61508
• Heartbeat Technology for safe, efficient operation
• Supports Bluetooth® & SmartBlue App
• Ex, WHG, SIL, Marine, Steam Boiler certifications

• Steam boiler level measurement
• Liquid ammonia, toxic & corrosive media
• Extreme high temperature & pressure (up to 400bar)
• High‑pressure applications with gas blankets
• Oil, petrochemical, chemical & gas tanks
• Offshore platforms & marine applications
• Demanding industries requiring SIL3, NACE, boiler certifications

Measuring Principle: Guided Wave Radar

Measuring Mode: Continuous level / liquid‑liquid interface

Accuracy:

• Rod / Coaxial: ±2 mm
• Cable ≤15m: ±2 mm
• Cable ＞15m: ±10 mm

Process Temperature:

• XT: -196…+280 °C
• HT: -196…+450 °C

Ambient Temperature: -50…+80 °C

Process Pressure: Vacuum … 400 bar

Probe Types: Rod, Cable, Coaxial

Max Range:

• Rod: 10 m
• Cable: 45 m
• Coaxial: 6 m

Min. Dielectric Constant:

• Rod / Cable ≤30m: DK＞1.6
• Cable 30–45m: DK＞1.9
• Coaxial: DK＞1.4

Wetted Parts: 304, 316L, Alloy C, Ceramic

Process Connections: G 1½, MNPT 1½; ASME / DN / JIS / Fisher / Masoneilan

Communication: 4…20 mA HART, PROFIBUS PA, FOUNDATION Fieldbus

Certifications:

• Ex: ATEX, FM, CSA, IECEx, NEPSI, EAC
• Safety: SIL3, WHG
• Design: EN 10204‑3.1, NACE MR0175, ASME B31.1/B31.3, AD2000
• Marine: GL, DNV, ABS, LR, BV
• Special: Steam Boiler certification

Options: Remote sensor with 3m cable