E+H Deltapilot FMB70 Hydrostatic Level Transmitter

Precision Hydrostatic Level Measurement with Endress+Hauser Deltapilot FMB70

The Endress+Hauser Deltapilot FMB70 is a premier hydrostatic level transmitter engineered for continuous level, volume, or mass measurement of liquids, slurries, and paste-like media in open or pressure-vessel tanks. Tailored for hygienic food and beverage production, pharmaceutical processing, water treatment, and chemical plants, the FMB70 combines high-grade mechanical construction with advanced digital signal processing to maintain uncompromising measurement stability under severe site conditions.

Patented Condensate-Resistant Contite Measuring Cell Technology

Pressure sensors operating in humid, washdown, or outdoor process environments frequently suffer from internal condensation caused by ambient thermal shifts. The Deltapilot FMB70 overcomes this challenge through its flush-mounted metallic Contite measuring cell. The cell is hermetically sealed, climatic-proofed, and completely protected against moisture ingress and process vapor. This unique physical construction ensures excellent reproducibility, low thermal hysteresis, and long-term zero-point stability—even during thermal shocks experienced during Clean-In-Place (CIP) and Sterilization-In-Place (SIP) cycles up to 135 °C (275 °F).

Key Performance Features & Technical Advantages

• Hermetic Contite Measuring Cell: Condensate-resistant and climate-proof design prevents signal drift caused by ambient humidity or vessel washdown.

• High Reference Accuracy: Delivers standard reference accuracy of ±0.1% of set span, with optional PLATINUM accuracy down to ±0.075% for high-precision batching and inventory control.

• Superior Chemical & Material Compatibility: Wetted process diaphragms are available in 316L stainless steel, Alloy C276, or optional Gold-Rhodium coating for aggressive chemical or hydrogen-diffusive media.

• Hygienic Flush-Mounted Connections: Offers a comprehensive range of sanitary process connections (Tri-Clamp, DIN 11851, DIN 11864, Varivent, SMS, DRD) that conform to 3-A, EHEDG, and ASME-BPE hygienic standards.

• Integrated Diagnostics & Data Management: Equipped with HistoROM/M-DAT memory modules and an optional 4-line digital display for intuitive, menu-guided setup, parameter backup, and fast troubleshooting.

• Functional Safety (SIL2/SIL3): Designed according to IEC 61508 for seamless deployment in safety-instrumented overfill prevention systems (SIL2 / SIL3 homogeneous redundant).

Unaffected by Foam and Tank Geometries

Traditional optical or acoustic level transmitters often struggle when foam layers or internal vessel agitators are present. Because the Deltapilot FMB70 measures liquid head pressure directly at the bottom of the tank, its readings remain completely unaffected by surface foam formation, agitator blades, or complex tank internal structures.

Applications 

• Food & Beverage Industry: Milk silos, syrup storage tanks, brewery fermenters, juice pasteurization lines, and sauce mixing vessels.

• Pharmaceutical & Fine Chemicals: Purified water (PW/WFI) tanks, bioreactors, sterile fluid processing, and solvent storage.

• Chemical Industry: Storage tanks for aggressive acids, alkalis, liquid additives, and viscous chemical intermediates.

• Water & Environmental Engineering: Clear water basins, drinking water reservoirs, and chemical dosing tanks.

Technical Specifications

Parameter / Feature	Specification Details
Measuring Principle	Hydrostatic pressure
Measuring Cell Type	Flush-mounted metallic Contite measuring cell
Pressure Measuring Range	100 mbar to 10 bar (1.5 psi to 150 psi / 1 mH2O to 100 mH2O)
Max. Overpressure Limit	Up to 40 bar (600 psi)
Reference Accuracy	Standard: ±0.1% | PLATINUM version: ±0.075% of set span
Long-Term Stability	0.05 % of URL / year
Process Temperature	-10 °C to +100 °C (14 °F to 212 °F) (up to +135 °C / 275 °F for max. 30 min)
Process Pressure (Abs.)	Vacuum resistance down to 0 mbar abs
Diaphragm Materials	316L Stainless Steel, Alloy C276, Gold-Rhodium coated
Housing Materials	Die-cast aluminum or 316L cast stainless steel
Process Connections	Threads (G1½, NPT1½), Flanges (DN40–DN100, ASME 1½”–4″), Hygienic (Tri-Clamp, Varivent, DIN11851, SMS)
Output / Protocol	4–20 mA HART, PROFIBUS PA, FOUNDATION Fieldbus
Ingress Protection	IP66 / IP68 / NEMA 6P (Optional separate housing)
Certificates / Approvals	ATEX, FM, CSA, IECEx, NEPSI, 3-A, EHEDG, ASME-BPE, SIL2/SIL3, NSF, DNV/GL

Key Features & Benefits

• Condensate-Proof Reliability: Hermetically sealed Contite cell eliminates drift in humid environments and washdown conditions.

• High Hygienic Compliance: Meets 3-A, EHEDG, and ASME-BPE standards for clean-in-place (CIP/SIP) automated lines.

• Foam-Immune Level Measurement: Direct hydrostatic head pressure reading ensures accuracy regardless of surface foam or agitation.

• SIL Safety Certified: Rated for use in SIL2/SIL3 safety-instrumented overfill protection systems.

• Flexible Digital Communications: Compatible with HART, PROFIBUS PA, and FOUNDATION Fieldbus automation backbones.

FAQ

Q1: What makes the Contite measuring cell inside the Deltapilot FMB70 unique?

Answer: The Contite cell is hermetically sealed against atmospheric humidity and vapor, making it completely climate-proof and immune to internal condensation errors during temperature shifts or tank washdowns.

Q2: Can the Deltapilot FMB70 be cleaned using high-temperature CIP/SIP processes?

Answer: Yes, the FMB70 operates at continuous process temperatures up to 100 °C (212 °F) and withstands steam sterilization cycles up to 135 °C (275 °F) for up to 30 minutes.

Q3: Is the FMB70 affected by foam on the surface of the liquid?

Answer: No, because the FMB70 measures hydrostatic head pressure at the tank bottom, its measurement is unaffected by surface foam, turbulence, or agitators.

Q4: What process diaphragm material options are offered for corrosive media?

Answer: In addition to standard 316L stainless steel, process diaphragms are available in Alloy C276 and Gold-Rhodium coating for high chemical resistance.

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