超声波液位计
Technical Data
CompareContinuous / Liquids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Compact ultrasonic transmitter |
| Supply / Communication | 2-wire HART |
| Accuracy | +/- 2 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 ... 3 bar abs (10 psi ... 44 psi) |
| Main wetted parts | PVDF |
| Process connection | G / NPT 2" |
| Blocking distance | 0.35 m (1.15 ft) |
| Max. measurement distance | Liquids: 8 m (26 ft), Solids: 3.5 m (11 ft) |
| Communication | 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, IEC, INMETRO, NEPSI |
| Application limits | For higher resistance: FMU42/FDU9x Foam / high turbulence possible: FMU42/FDU91 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 | +/- 2 mm or +/- 0,2 % of set measuring range 1) |
| 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 ... 3 bar abs (10 psi ... 44 psi) |
| Main wetted parts | PVDF |
| Process connection | G / NPT 2" |
| Blocking distance | 0.35 m (1.15 ft) |
| Max. measurement distance | Liquids: 8 m (26 ft), Solids: 3.5 m (11 ft) |
| Communication | 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, IEC, INMETRO, NEPSI |
| Application limits | Take notice of range diagram |
Liquids
| Measuring Principle | Ultrasonic |
| Product headline | Compact ultrasonic measuring instrument Cost effective solution for open channels |
| Max. measurement error | > 2 mm depending on flow application |
| Measuring range | Measuring distance 0.4...8 m [1.3...26 ft] |
| Max. process pressure | 0.7 bar...3 bar (10 psi...44 psi) |
| Medium temperature range | -40°C...80°C (-40°F...176°F) |
| Degree of protection | IP68 |
| Outputs | 4...20mA HART |
| Inputs | 2-wire |
| Digital communication | HART |
| Hazardous area approvals | ATEX, IEC, FM, CSA, INMETRO, NEPSI |
The Prosonic FMU41 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 for level measurement under 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
Four-line plain text display with menu-guided on-site operation for fast, simple instrument commissioning, available in 7 languages
On-site envelope curve display for simple instrument fault diagnosis
The FieldCare operating software allows convenient remote operation, fault diagnosis and measuring point documentation
Suitable for hazardous areas (gas Ex, dust Ex)
Linearization function (up to 32 points) converts the measured value into length, volume or flow in any unit
Built-in temperature sensor for automatic correction of the temperature-dependent speed of sound
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 available model:FMU41-ARB2A2
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Related Models
Case Studies
市政污水处理污水处理厂 · 超声波应用案例
项目背景
市政污水处理客户在污水处理厂环节，长期面临「出水水质监测精度不足、仪表易受污染导致数据漂移，影响达标排放」的困扰，对超声波的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的超声波，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应市政污水处理复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
食品饮料食品生产线 · 超声波应用案例
项目背景
食品饮料客户在食品生产线环节，长期面临「卫生级测量要求高，在线仪表需耐 CIP/SIP 清洗且精度稳定」的困扰，对超声波的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的超声波，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应食品饮料复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
化工制药反应釜与储罐 · 超声波应用案例
项目背景
化工制药客户在反应釜与储罐环节，长期面临「介质腐蚀性强、工况复杂，仪表需耐腐蚀且防爆」的困扰，对超声波的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的超声波，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应化工制药复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
电力能源电厂锅炉与汽机 · 超声波应用案例
项目背景
电力能源客户在电厂锅炉与汽机环节，长期面临「高温高压工况下测量不稳定，维护停机成本高」的困扰，对超声波的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的超声波，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应电力能源复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
