Endress+Hauser FTL31-AA4U2AAWDJ Advanced Fork Level Switch for Reliable Point Level Detection

The Endress+Hauser FTL31-AA4U2AAWDJ is a high-performance, tuning fork level switch designed for precise and reliable point level detection in liquids and light bulk solids. Engineered for demanding industrial applications, this device ensures safety, process efficiency, and minimal maintenance.

Core Product Features & Benefits:

Universal Application: The FTL31 is suitable for liquids (including coatings, adhesives, and foaming liquids) and light bulk solids. The specific -AA4U2AAWDJ model features a standard 1" NPT process connection and a 4-inch long fork, making it ideal for tanks and vessels.

Unmatched Reliability: The tuning fork technology is unaffected by flow, bubbles, turbulence, conductivity, viscosity, or density changes. It provides a consistent, repeatable switching signal, preventing overfill or dry-run conditions.

Hygienic & Robust Design: Built with stainless steel (wetted parts) and high IP67 protection rating, this level switch is perfect for hygienic applications and harsh environments. It resists buildup and is easy to clean.

Simple Installation & Setup: As a maintenance-free instrument with no moving parts, the FTL31 is ready to use out of the box. Its compact design allows for flexible installation. The advanced self-monitoring diagnostics (featured in many variants) ensure operational safety.

Global Safety Certifications: The FTL31 series typically carries international approvals like ATEX, IECEx, FM, and SIL2 for use in hazardous areas and safety instrumented systems, providing peace of mind.

Technical Specifications (Summary):

Product: Level Switch, Tuning Fork

Model: FTL31-AA4U2AAWDJ

Process Connection: 1" NPT

Prong Length: 100 mm (approx. 4 inches)

Output: SPDT Relay

Material: Stainless Steel 316L

Temperature Range: -50 to +150 °C

Pressure Rating: Up to 40 bar (580 psi)

Typical Applications:

Overfill protection or low-level detection in storage and process tanks

Pump control (dry-running protection)

Level detection in mixing vessels, reactors, and distillation columns

Suitable for industries: Chemical, Pharmaceutical, Food & Beverage, Water & Wastewater, Oil & Gas.

Why Choose Endress+Hauser?

Endress+Hauser is a global leader in measurement instrumentation, services, and solutions for industrial process engineering. Choosing the FTL31 means investing in quality, accuracy, and comprehensive support throughout the instrument's lifecycle.