Endress+Hauser FTL31-AA4M2AAWBJ Guided Wave Radar Level Transmitter

The Endress+Hauser FTL31-AA4M2AAWBJ is a high-performance, two-wire guided wave radar level transmitter designed for continuous, reliable measurement of liquids in demanding industrial processes. Part of the proven Levelflex family, this instrument excels in applications with foam, heavy vapors, turbulence, or changing dielectric constants, delivering stable and accurate readings where other technologies fail.

Product Features & Benefits

Guided Wave Radar (TDR) Principle: Provides precise level measurement independent of process conditions like pressure, temperature, vapor, foam, or dust. Ideal for complex media.

Robust Single-Rod Probe (AA): The rigid probe is suitable for liquids in tanks and process vessels up to 6 meters (20 ft). Model AA4M indicates a 4-meter probe length.

High Reliability, Low Maintenance: Non-contact measurement on the probe, with no moving parts, ensures minimal wear and reduced lifecycle costs.

Exceptional Process Compatibility: With a housing rating of AAWBJ, it features an aluminum enclosure (IP66/67), a PFA probe seal, and a 1½" NPT process connection. This makes it suitable for a wide range of chemicals and aggressive media.

Simple Commissioning & Operation: Intuitive setup via the on-site display or using the Endress+Hauser Field Xpert tool or SmartBlue app. Heartbeat Technology® provides onboard diagnostics for predictive maintenance.

Global Approvals: Certified for use in hazardous areas (ATEX, IECEx, FM, CSA), ensuring safety in explosive atmospheres.

Technical Specifications at a Glance

Measuring Principle: Guided Wave Radar (Time Domain Reflectometry)

Measuring Range: Up to 6 m (20 ft) (dependent on probe type)

Process Connection: 1½" NPT

Process Seal: PFA

Probe Type: Single rod, 4m length (AA4M)

Housing: Aluminum, IP66/67

Output: 4...20 mA HART® 7

Power Supply: Standard two-wire, 12...30 V DC

Communication: HART, with optional Bluetooth® for wireless configuration

Approvals: ATEX, IECEx, FM, CSA, SIL 2/3 capable

Typical Applications

The FTL31-AA4M2AAWBJ is the preferred choice for continuous level measurement in:

Chemical & Petrochemical Industry: Storage tanks, process vessels, separators.

Power Generation: Feedwater tanks, condensate receivers, DA tanks.

Water & Wastewater: Clearwells, chemical storage, process tanks.

Pharmaceutical & Food: CIP/SIP capable versions available for hygienic applications.

Why Choose Endress+Hauser?

Endress+Hauser is a world leader in level measurement. The Levelflex FTL31 series offers:

Unmatched Expertise: Decades of application knowledge in guided wave radar.

Global Support: Comprehensive service network for calibration, training, and support.

IIoT Ready: Seamless integration into Plantweb™ ecosystems and other control systems via HART, PROFIBUS PA, or Foundation Fieldbus.

Ordering Information & Model Code Breakdown

The model code FTL31-AA4M2AAWBJ specifies:

FTL31: Levelflex series, guided wave radar, two-wire.

A: Single rod probe.

A4M: Probe length 4 meters.

2: 1½" NPT process connection.

A: PFA process seal.

A: Aluminum housing.

WB: Standard housing design with cable entry.

J: Special approval package (e.g., FM, CSA).

For exact specifications, datasheets, and manuals, or to find a local distributor, visit the official Endress+Hauser website.

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