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)
|
Parameter |
Typical Range |
|
Measuring principle |
Electronic differential pressure |
|
Applications |
Level, volume, density |
|
Measuring range |
Depending on sensor module (often up to ±40 mbar to 40 bar differential) |
|
Process temperature |
Wide range depending on diaphragm seal |
|
Process pressure |
Up to several hundred bar (with proper seal) |
|
Accuracy |
High (often ≤ 0.075% of span or better) |
|
Communication |
HART, PROFIBUS PA, FOUNDATION Fieldbus |
|
Safety |
SIL2/SIL3 capable (depending on configuration) |
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
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.