Endress+Hauser FMU30‑10A10

Technical Specifications: Measuring principle: Ultrasonic time‑of‑flight Max measuring range: Liquid 8 m, solid 3.5 m Accuracy: ±3 mm or ±0.2 % of full measuring range Process temperature: ‑20 °C ~ +60 °C Process pressure: 0.7 bar ~ 3 bar absolute Output signal: 4‑20 mA two‑wire Process connection: G1½ thread Wetted parts material: PP, EPDM Power supply: Two‑wire loop power Display: Four‑line plain‑text local display with envelope curve visualization Operating languages: 7 selectable languages Isolation: Galvanic isolation between measuring circuit and output circuit

Functional Features: Built‑in temperature sensor for automatic sound velocity compensation Interference echo suppression function to filter echo from tank welds and internal obstacles 32‑point linearization function to convert measured distance into volume, height or flow value On‑site envelope curve display for fast fault diagnosis Menu‑guided local commissioning Two‑wire loop powered, low installation wiring cost Non‑contact measurement eliminates medium corrosion and abrasion impact on sensor components

Application Scenarios: Sewage treatment plant level monitoring Process water storage tank, buffer tank level measurement Liquid and slurry storage tank continuous level tracking Granular bulk material silo level detection Water intake and drainage tank level monitoring in water‑supply industry

Material Composition: Housing: Polycarbonate plastic Sensor diaphragm: PP Sealing component: EPDM rubber Terminal block: Reinforced nylon plastic

Structural Characteristics: Integrated compact monoblock structure, sensor and transmitter unit are non‑separable Thread‑type process connection for tank top mounting Local display window on front face of housing Internal integrated temperature sensing element Internal software algorithm processing unit without moving mechanical components

Working Principle: The sensor emits ultrasonic pulse signals towards the medium surface. Pulses reflect back after hitting medium surface and are received by the sensor. The device calculates distance between sensor diaphragm and medium surface by measuring flight time of ultrasonic wave combined with sound velocity. Built‑in temperature sensor compensates sound velocity deviation caused by temperature variation. The empty distance parameter set by user subtracts measured distance to output real‑time level value. Interference echo suppression masks invalid reflection signals from tank internal structures to guarantee measuring reliability.

Installation Requirements: Mount on tank top via G1½ threaded connection. Do not install at absolute center of tank top, keep distance of 1/6 tank diameter away from tank wall. Avoid installation directly above filling stream. Use sun‑rain protective cover for outdoor installation. Ensure no obstacles within ultrasonic beam angle. Install with counter nut, mounting sleeve or installation bracket as accessory options. Keep blocking distance zone free of medium surface to avoid measurement failure. Wiring shall comply with two‑wire instrument standard, separate from high‑power cable routing. Ground the housing according to local electrical specifications.

Usage Notes: Do not apply in high‑foam medium surface environment, foam will absorb ultrasonic pulse and cause measuring failure. Avoid heavy vapor or condensation directly on sensor diaphragm. Verify blocking distance parameter before commissioning, medium surface cannot enter blocking distance. Execute interference echo suppression after field installation. Do not use in medium with strong ultrasonic‑absorbing property. Regularly inspect sensor diaphragm for contamination accumulation. Strictly follow permitted process temperature and pressure range.