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E+H FMU30 Non-Contact Ultrasonic Level Transmitter
FMU30-AAHEAAGGF
The Prosonic FMU30 Non-Contact Ultrasonic Level Transmitter provides highly accurate, maintenance-free continuous level and open-channel flow measurement for liquids, pastes, and coarse bulk solids across municipal and industrial applications. Featuring an integrated temperature sensor for automatic sound velocity compensation, a user-friendly 4-line plain text display with 32-point linearization, and a rugged IP68-rated weatherproof enclosure, this compact 2-wire transmitter delivers dependable real-time tank monitoring, pump control, and overflow protection in sewage treatment plants, process water storage, and chemical buffer tanks.
The Prosonic FMU30 continuous ultrasonic level transmitter represents a cost-effective, versatile, and non-contact sensing solution engineered specifically for industrial liquid storage, wastewater handling, and bulk solids inventory monitoring. Utilizing advanced echo-processing Time-of-Flight ultrasonic technology, the transmitter emits high-frequency acoustic pulses toward the media surface and calculates the precise distance based on the reflected signal transit time.
Because the physical sensing element never contacts the measured medium, the device eliminates mechanical wear, chemical corrosion, and maintenance downtime commonly associated with traditional submersible or mechanical float switches. The instrument incorporates an integrated temperature sensor directly within the transducer housing to continuously compensate for ambient temperature fluctuations, guaranteeing high-accuracy readings even under variable climatic conditions. Operating on a standardized 2-wire 4-20mA loop-powered communication protocol, the unit easily integrates into existing PLC, DCS, and SCADA automation architectures.
The compact sensor body features thread connections starting from G 1½ or 1½ NPT, allowing quick ceiling or flange mounting atop open channels, sumps, storage tanks, and silos. Commissioning is streamlined through an intuitive menu-guided local interface equipped with a backlit 4-line multilingual text display that renders real-time envelope curves for instant signal diagnostics and troubleshooting. Built-in software features include up to a 32-point linearization function, enabling precise conversion of measured height into custom volumetric units or flow rates for flumes and weirs. Engineered with durable PP and PVDF wetted materials and housed in a IP68/NEMA 4X protective enclosure, this ultrasonic transmitter delivers long-term durability and operational confidence in harsh environmental and industrial processing environments.
FAQ
Q1: What is the maximum measuring range of the Prosonic FMU30 ultrasonic sensor?
A1: The measuring range depends on the selected sensor size and target material. The 1½-inch sensor model covers up to 5 meters (16 ft) for liquids and 2 meters (6.6 ft) for bulk solids. The 2-inch sensor model extends the measuring range up to 8 meters (26 ft) for liquids and 3.5 meters (11 ft) for bulk solids.
Q2: Can the FMU30 be used for open channel flow measurement?
A2: Yes, the transmitter features an integrated 32-point linearization table that allows users to map measured liquid levels directly into volumetric flow rates for standard open channel flumes and weir channels.
Q3: How does temperature change affect the level measurement accuracy?
A3: Sound velocity in air varies with temperature. The FMU30 includes a built-in temperature sensor within the transducer that automatically measures ambient temperature and continuously compensates the sound velocity calculation to ensure precise accuracy.
Q4: Is this sensor suitable for hazardous or explosive environments?
A4: Yes, options with international explosion protection approvals including ATEX, IECEx, NEPSI, and CSA C/US certifications are available for safe installation in hazardous areas.
Q5: What process connections are available for installation?
A5: The instrument comes standard with G 1½” / NPT 1½” or G 2″ / NPT 2″ threaded process connections, and optional universal slip-on flanges (2″ to 4″) are also supported for flexible tank mounting.
Spécifications techniques
| Measurement Principle | Ultrasonic |
|---|---|
| Features/Applications | Compact Ultrasonic Transmitter |
| Power/Communication | Two-wire connection |
| Measurement Accuracy | +/- 3 mm or +/- 0.2% of the set range |
| Ambient Temperature | -20...60 °C (-4...140 °F) |
| Process Temperature | -20...60 °C (-4...140 °F) |
| Process Pressure (Absolute)/Maximum Overpressure Limit | 0.7...3 bar abs (10...44 psi) |
| Main Wetted Parts | PP/EPDM |
| Process Connection | G/NTP 1 1/2" G/NTP 2" |
| Blind Zone Distance | 1 1/2" : 0.25 m (0.8 ft) 2" : 0.35 m (1.15 ft) |
| Maximum Measurement Distance | Sensor 1-1/5": 5 m (16 ft) Sensor 2": 8 m (26 ft) |
| Communication | 4...20mA |
| Certificates and Certifications | ATEX, CSA C/US, IEC Ex, NEPSI |
| Options: Mounting Accessories | UNI Flange 2" ... 4" |
| Application Limitations | For higher resistance: FMU41/42/FDU9x Foam/high turbulence possible: FMU42/FDU91 Fast filling and discharging rate: FMU90 + FDU9x Level limit detection: FMU90 + FDU9x |
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