Endress Hauser FMD77-ABB7LE1BAAA E+H Differential Pressure Transmitter Deltabar S

Deltabar FMD77 — Introduction

The Deltabar FMD77 from Endress+Hauser is a high-performance differential pressure (DP) transmitter specifically designed for level measurement in pressurized and vacuum tanks. It uses electronic differential pressure technology, which replaces traditional capillary-based systems and eliminates many of their limitations.

Unlike classic DP systems with long oil-filled capillaries, the FMD77 uses two separate sensor modules connected electronically, resulting in higher accuracy, faster response, and dramatically reduced temperature influence.

Key Features

1. Electronic Differential Pressure (eDP) Technology

• No oil-filled capillaries
• No temperature-induced measurement drift
• Faster and more stable signal transmission
• Highly accurate over long distances

2. Designed for Pressurized & Vacuum Tanks

• Ideal for applications requiring reliable level measurement under varying pressure conditions
• High overload resistance

3. Robust & Maintenance-Friendly

• Fewer mechanical parts → minimal drift
• No mechanical wear points
• Easy installation and commissioning

4. Excellent Temperature Performance

• Electronic signal = minimal temperature effect
• Suitable for outdoor installations and large tanks

5. HART, Profibus, Foundation Fieldbus Options

• Smart transmitter diagnostics
• Integration with DCS/PLC systems
• Part of the Endress+Hauser Memosens / Heartbeat family (diagnostics vary by model)

Typical Applications

The Deltabar FMD77 is optimized for:

Level Measurement in:

• Pressurized tanks
• Vacuum tanks
• Evaporators
• Distillation towers
• Chemical reactors
• Food & beverage storage vessels Ideal Industries:

• Chemical & petrochemical
• Oil & gas
• Power generation
• Food & beverage
• Pharmaceutical
• Water & wastewater

Technical Highlights (At a Glance)

Why Choose the Deltabar FMD77?

• Exceptional accuracy even in harsh environments
• No capillary-related problems (blockage, leakage, long settling times)
• Faster startup and response
• Lower total cost of ownership
• Highly reliable in high-temperature or outdoor installations