超声波液位计探头
Technical Data
CompareContinuous / Liquids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300m in-between sensor and transmitter |
| Specialities | Floating protection tube |
| Supply / Communication | 4-wire (HART, PROFIBUS DP) |
| Accuracy | +/- 2mm + 0.17% of measured distance |
| 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 ... 4 bar abs (10 psi ... 58 psi) |
| Main wetted parts | PVDF (IP68 / NEMA6P) |
| Process connection | Front side thread: G / NPT 1 1/2" Rear side thread: G / NPT 1" Ceiling mounting |
| Blocking distance | 0.07 m (0.23 ft) |
| Max. measurement distance | Liquids: 3 m (9.8 ft), Solids: 1.2 m (3.9 ft) |
| Communication | Transmitter: 4 ... 20 mA HART PROFIBUS DP |
| Certificates / Approvals | ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, UK Ex |
| Options | Second 4...20mA output |
| Components | Transmitter: FMU90, FMU95 |
| Application limits | Foam / high turbulence possible: FDU92 Flange-flush assembly: FDU91F For tank farms scanner: FMU95 |
Continuous / Solids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300m in-between sensor and transmitter |
| Supply / Communication | 4-wire (HART, PROFIBUS DP) |
| Accuracy | +/- 2mm + 0.17% of measured distance |
| 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 ... 4 bar abs (10 psi ... 58 psi) |
| Main wetted parts | PVDF (IP68 / NEMA6P) |
| Process connection | Front side thread: G / NPT 1 1/2" Rear side thread: G / NPT 1" Ceiling mounting |
| Blocking distance | 0.07 m (0.23 ft) |
| Max. measurement distance | Liquids: 3 m (9.8 ft), Solids: 1.2 m (3.9 ft) |
| Communication | Transmitter: 4 ... 20 mA HART PROFIBUS DP |
| Certificates / Approvals | ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, UK Ex |
| Options | Second 4...20mA output |
| Components | Transmitter: FMU90 |
Liquids
| Measuring Principle | Ultrasonic |
| Product headline | Version with separate transmitter in field housing or top hat rail housing Cost effective solution for open channel flow measurement in water / wastewater plants |
| Max. measurement error | Accuracy: distance measurement: +/- 2mm + 0.17% |
| Measuring range | Up to 3 m / 9.8 ft |
| Max. process pressure | 0.4 bar...4 bar (10 psi...58 psi) |
| Medium temperature range | -40 °C ... 80 °C (-40 °F ... 176 °F) |
| Degree of protection | IP68 |
| Display/Operation | Transmitter FMU90 |
| Outputs | Transmitter: 4 ... 20 mA HART PROFIBUS DP |
| Inputs | Transmitter FMU90 |
| Digital communication | HART, PROFIBUS DP |
| Hazardous area approvals | ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, UK Ex |
The FDU90 ultrasonic sensor is suitable for continuous, non-contact level measurement of liquids and pastes, is maintenance-free and can also be used for flow measurement in open channels and measuring weirs. Measured values are unaffected by dielectric constant, density or humidity, and the sensor self-cleaning function eliminates the influence of medium adhesion on measurement. Suitable for explosive hazardous areas; maximum measuring range: liquids 3m.
Advantages
Built-in temperature sensor for time-of-flight calibration; precise measurement even with temperature changes
Hermetically welded PVDF sensor for the highest level of corrosion-resistant measurement applications
Suitable for harsh climatic conditions; sensor and transmitter can be installed separately with a maximum distance of 300m
Sensor self-cleaning function reduces adhesion formation
Built-in automatic sensor detection for convenient commissioning with the FMU90/FMU95 transmitter
Degree of protection IP68
Sensor with heating function (optional) prevents icing and ensures reliable measured values
Areas of application
Suitable for continuous, non-contact level measurement of liquids and pastes; flow measurement in open channels and measuring weirs. Maximum measuring range: liquids 3m (9.8ft).
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Technical documentation
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Measuring principle video
Source:Endress+Hauserwebsite public information
Related Models
| Model | Name |
|---|---|
| FDU90-AG1AA | 超声波液位计探头 |
| FDU90-AG2AA | 超声波液位计探头 |
| FDU90-AG3AA | 超声波液位计探头 |
| FDU90-AG4AA | 超声波液位计探头 |
| FDU90-AG5AA | 超声波液位计探头 |
| FDU90-AG6AA | 超声波液位计探头 |
| FDU90-AN1AA | 超声波液位计探头 |
| FDU90-AN2AA | 超声波液位计探头 |
| FDU90-AN3AA | 超声波液位计探头 |
| FDU90-AN4AA | 超声波液位计探头 |
| FDU90-AN5AA | 超声波液位计探头 |
| FDU90-AN6AA | 超声波液位计探头 |
| FDU90-JG1AA | 超声波液位计探头 |
| FDU90-JG2AA | 超声波液位计探头 |
| FDU90-JG3AA | 超声波液位计探头 |
| FDU90-JG4AA | 超声波液位计探头 |
| FDU90-JG5AA | 超声波液位计探头 |
| FDU90-JG6AA | 超声波液位计探头 |
| FDU90-JN1AA | 超声波液位计探头 |
| FDU90-JN2AA | 超声波液位计探头 |
| FDU90-JN3AA | 超声波液位计探头 |
| FDU90-JN4AA | 超声波液位计探头 |
| FDU90-JN6AA | 超声波液位计探头 |
| FDU90-RG1AA | 超声波液位计探头 |
| FDU90-RG2AA | 超声波液位计探头 |
| FDU90-RG3AA | 超声波液位计探头 |
| FDU90-RG4AA | 超声波液位计探头 |
| FDU90-RG5AA | 超声波液位计探头 |
| FDU90-RG6AA | 超声波液位计探头 |
| FDU90-RN1AA | 超声波液位计探头 |
| FDU90-RN2AA | 超声波液位计探头 |
| FDU90-RN3AA | 超声波液位计探头 |
| FDU90-RN4AA | 超声波液位计探头 |
| FDU90-RN5AA | 超声波液位计探头 |
| FDU90-RN6AA | 超声波液位计探头 |
| FDU9O-JN5AA | 超声波液位计探头 |
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。
