Endress+Hauser FTL31-AA4U3AAWDJ Compact Fork-Level Switch Liquids and Slurries

The Endress+Hauser FTL31-AA4U3AAWDJ is a robust, compact fork-level switch designed for reliable point-level detection of liquids, pastes, and slurries in small tanks, pipes, or machinery. Its tuning-fork technology ensures high-precision switching, unaffected by flow, bubbles, turbulence, or changing product properties like density, conductivity, or viscosity.

Key Features & Benefits:

Universal Application: Ideal for overfill protection, dry-run protection, or pump control in water, chemicals, oils, coatings, and food & beverage.

Compact Design: The "Compact" version with a 2-inch (50mm) fork length is perfect for installations in tight spaces or small vessels.

Robust & Maintenance-Free: The stainless steel (A4/U3 - 316L/1.4404) sensing fork and housing ensure excellent resistance to corrosion and aggressive media. No moving parts mean no wear.

High Reliability: Piezo-ceramic drive guarantees stable vibration and insensitivity to product buildup, ensuring a fail-safe operation and minimizing false switching.

Easy Installation & Setup: Simple mounting via 1" NPT thread (AAWDJ variant). Automatic tuning with quick start-up via one-button calibration.

Clear Diagnostics: Integrated LED indicator for clear status signaling (process condition, output state, diagnostics).

Technical Specifications (Highlights):

Product Family: FTL31 - Compact Fork Level Switch

Process Connection: 1" NPT thread (AAWDJ)

Fork Material: Stainless Steel 1.4404 / AISI 316L (AA4U3)

Output: SPDT relay (configurable as N/O or N/C)

Power Supply: 24 V DC or 230 V AC versions available.

Approvals: CE, cULus, SIL, EHEDG, 3-A

Why Choose the FTL31-AA4U3AAWDJ?

For engineers and plant managers seeking a no-compromise, low-maintenance level switch for demanding liquids and slurries, the Endress+Hauser FTL31 offers outstanding value. Its compact size, material robustness, and tuning-fork reliability make it a top choice for ensuring process safety and efficiency in chemical processing, pharmaceuticals, food production, and water treatment.

Common Applications:

Overfill prevention in mixing tanks

Dry-running protection for pumps

Level control in small process vessels

Interface detection in pipes