Technical Data
CompareContinuous / Liquids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Compact ultrasonic transmitter |
| Supply / Communication | 2-wire HART |
| Accuracy | +/- 4 mm or +/- 0,2 % of set measuring range |
| Ambient temperature | -40 °C ... 80 °C (-40 °F ... 176 °F) |
| Process temperature | -40 °C ... 80 °C (-40 °F ... 176 °F) |
| Process pressure / max. overpressure limit | 0.7 bar ... 2.5 bar abs (10 psi ... 36 psi) |
| Main wetted parts | PVDF |
| Process connection | Flange DN80, ASME 3", JIS 10K 80 DN100,ASME 4", JIS 10K 100 Mounting bracket |
| Blocking distance | 0.4 m (1.3 ft) |
| Max. measurement distance | Liquids: 10 m (33 ft), Solids: 5 m (16 ft) |
| Communication | 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, IEC, INMETRO, NEPSI |
| Application limits | Foam / high turbulence possible: FMU44/FDU92 Fast filling and discharging rate: FMU90 + FDU9x Level limit detection FMU90 + FDU9x |
Continuous / Solids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Compact ultrasonic transmitter |
| Supply / Communication | 2-wire HART |
| Accuracy | +/- 4 mm or +/- 0,2 % of set measuring range |
| Ambient temperature | -40 °C ... 80 °C (-40 °F ... 176 °F) |
| Process temperature | -40 °C ... 80 °C (-40 °F ... 176 °F) |
| Process pressure / max. overpressure limit | 0.7 bar ... 2.5 bar abs (10 psi ... 36 psi) |
| Main wetted parts | PVDF |
| Process connection | Flange DN80, ASME 3", JIS 10K 80 DN100,ASME 4", JIS 10K 100 Mounting bracket |
| Blocking distance | 0.4 m (1.3 ft) |
| Max. measurement distance | Liquids: 10 m (33 ft), Solids: 5 m (16 ft) |
| Communication | 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, IEC, INMETRO, NEPSI |
| Application limits | Take notice of range diagram |
The Prosonic FMU42 is used for non-contact level measurement of liquids, pastes and coarse bulk solids as well as for flow measurement in open channels or weirs. The two-wire or four-wire compact transmitter can be used in demanding conditions such as storage tanks, agitators, silos and conveyor belts. On-site envelope curve display enables simple instrument fault diagnosis. The linearization function (up to 32 points) converts the measured value into length, volume or flow in any unit.
Benefits
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Four-line plain text display with menu-guided on-site operation for fast, simple instrument commissioning, available in 7 languages
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On-site envelope curve display for simple instrument fault diagnosis
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The FieldCare operating software allows convenient remote operation, fault diagnosis and measuring point documentation
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Suitable for hazardous areas (gas Ex, dust Ex)
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Linearization function (up to 32 points) converts the measured value into length, volume or flow in any unit
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Built-in temperature sensor for automatic correction of the temperature-dependent speed of sound
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Optional remote display and operation (maximum installation distance from the transmitter of 20 m (66 ft))
Application areas
For continuous, non-contact level measurement of liquids, pastes, sludge and bulk solids; flow measurement in open channels and measuring weirs; system integration: HART (standard), 4…20 mA, PROFIBUS PA, FOUNDATION Fieldbus; maximum measuring range: liquids: 5 m, solids: 2 m. Other measuring ranges: FMU41: liquids 8 m, solids: 3.5 m; FMU42: liquids: 10 m, solids: 5 m; FMU43: liquids: 15 m, solids: 7 m; FMU44: liquids 20 m, solids: 10 m
Commonly used model: FMU42-APB2A22A
Spare Parts & Accessories 48
48 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52020763 | plug connectorCerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 535720-9020 | Set of screws housing F12/T12/F23Consists of: 1x stop screw M5x10. 1x retaining screw M8x10. Usage: FMR230/FMR231, FMR240/FMR244/FMR245, FMR250, FMU40/FMU41/FMU42/FMU43/FMU44. | Details |
| 52010526 | Seal kitconsists of: 1x O-ring 113.9x3.53 EPDM 1x O-ring 72.0x3.0 EPDM 1x O-ring 49.21x3.53 EPDM 1x flat gasket 47x58x2 EPDM 1x flat gasket 59x68x2.5 EPDM 2x O-ring 17,0x2,0 EPDM | Details |
| 52006026 | Terminal Chamber CoverHood for terminal compartment Micropilot M, Prosonic M, Levelflex M | Details |
| 52019062 | Terminal Chamber CoverHood for terminal compartment for separate display Micropilot M, Prosonic M, Levelflex M | Details |
| 52005936 | Aluminum coverMaterial: Aluminium for operating + display module VU331 and housing F12/T12 Micropilot M/S, Prosonic M, Levelflex M | Details |
| 517391-0011 | Cover F12/T12 Alu, coated, gasketMaterial: aluminium, coated. O-ring EPDM. Usage: FMR230/FMR231, FMR240/FMR244/FMR245, FMR250, FMU40/FMU41/FMU42/FMU43/FMU44. | Details |
| 518710-0020 | Cover T3/T12 Alu, coated, gasketMaterial: aluminium, coated. O-ring EPDM. Usage: FMR230/FMR231,FMR240/FMR244/ FMR245, FMR250, FMR530/FMR531/FMR532/ FMR533, FMR540, FMU40/FMU41/FMU42. | Details |
| 52005643 | maskcable compartment, electronics side Micropilot M/S, Prosonic M, Levelflex M | Details |
| 71092209 | O-ringUsage: cover T12/F12/F23. | Details |
| 52006197 | Terminal modulewith cable connection for housing F12 Micropilot M, Levelflex M, Prosonic M | Details |
| 52012156 | Terminal modulePROFIBUS PA, FOUNDATION Fieldbus Micropilot II/M, Prosonic M, Levelflex M | Details |
| 52013304 | Power Supplyfor electronics 4-wire Levelflex M, Prosonic M | Details |
| 52013305 | Power Supplyfor electronics 4-wire Levelflex M, Prosonic M | Details |
| 71396869 | Power supply module 90-250VAC (F12) v2, non-explosion-proofPower supply, HART, version 2. Only for "non ex area". Usage: FMU40/FMU41/FMU42/FMU43/FMU44. | Details |
| 52015585 | Power Supplyfor electronics 4-wire Levelflex M, Prosonic M | Details |
| 52015586 | Power Supplyfor electronics 4-wire Levelflex M, Prosonic M | Details |
| 52013302 | Terminal modulefor housing T12, Levelflex M, Prosonic M, Micropilot M | Details |
| 52013303 | Terminal module2-wire, PROFIBUS PA/FOUNDATION Fieldbus Ex d limiter, for housing T12 Levelflex M, Micropilot M, Prosonic M | Details |
| 52018949 | Terminal module4-pole, 2-wire for Aluminium T12 housing OVP = overvoltage protection Levelflex M, Prosonic M, Micropilot M | Details |
Configurator / Comparison
Measuring principle video
Click to playSource: public information from the Endress+Hauser website
Manuals & Documents 12
All documents for this model12 documents · click to expand
操作手册 Prosonic M FMU40/41/42/43/44 Chinese
Prosonic M FMU42 HART Chinese
Prosonic M FMU40/41/42/43/44 English
Prosonic M FMU40/41/42/43/44 English
Prosonic M FMU40/41/42/43/44 English
Prosonic M FMU40/41/42/43/44 English
Prosonic M FMU 40/41/42/43 4-20mA HART, PA, FF Description of Instrument Functions English
Prosonic M FMU42 HART English
Prosonic M FMU 40/41/42/43 Foundation Fieldbus Operating Instructions English
Prosonic M FMU 40/41/42/43 4-20 mA HART Operating Instructions English
Prosonic M FMU 40/41/43 PROFIBUS-PA Operating Instructions English
Prosonic M FMU 40/41/42/43 Foundation Fieldbus Operating Instructions English
Case Studies
Municipal Wastewater Treatment · ultrasound — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from ultrasound , focusing on ultrasonic liquid level measurement or interface detection.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The ultrasound specification must therefore cover sizing range against dead zone, mounting height and medium temperature.
Delivery Approach
Delivery was handled as the level range — level solution matched to the actual tank and silo geometry. Execution centred on sizing range against dead zone, mounting height and medium temperature, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — retrofit without touching the tank, with short installation time, with confidence in this measuring point improving markedly.
Food & Beverage · ultrasound — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is ultrasound ; the focus is ultrasonic liquid level measurement or interface detection.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with sizing range against dead zone, mounting height and medium temperature.
Implementation
The scope ran through the level range: level solution matched to the actual tank and silo geometry. Technically it hinges on sizing range against dead zone, mounting height and medium temperature, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means retrofit without touching the tank, with short installation time, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · ultrasound — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on ultrasound and the core task is ultrasonic liquid level measurement or interface detection.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So ultrasound cannot be specified generically — it calls for sizing range against dead zone, mounting height and medium temperature.
Solution
The Ainstru engineering team worked through the level range: level solution matched to the actual tank and silo geometry. The configuration involves sizing range against dead zone, mounting height and medium temperature, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is retrofit without touching the tank, with short installation time.
Power & Energy · ultrasound — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted ultrasound properly configured on the existing plant, with the aim of ultrasonic liquid level measurement or interface detection.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the ultrasound configuration has to involve sizing range against dead zone, mounting height and medium temperature.
Configuration
Supply and installation were organised through the level range: level solution matched to the actual tank and silo geometry. On site this meant sizing range against dead zone, mounting height and medium temperature, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is retrofit without touching the tank, with short installation time, and the readings are now used for process tuning.
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