超声波液位计
Technical Data
CompareContinuous / Liquids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Compact ultrasonic transmitter |
| Supply / Communication | 2-wire |
| Accuracy | +/- 3 mm or +/- 0,2 % of set measuring range |
| Ambient temperature | -20 °C ... 60 °C (-4 °F ... 140 °F) |
| Process temperature | -20 °C ... 60 °C (- 4°F ... 140 °F) |
| Process pressure / max. overpressure limit | 0.7 bar ... 3 bar abs (10 psi ... 44 psi) |
| Main wetted parts | PP/EPDM |
| Process connection | G / NPT 1 1/2" G / NPT 2" |
| Blocking distance | 1 1/2": 0.25 m (0.8 ft) 2":0.35 m (1.15 ft) |
| Max. measurement distance | Sensor 1-1/5": 5 m (16 ft) Sensor 2": 8 m (26 ft) |
| Communication | 4...20 mA |
| Certificates / Approvals | ATEX, CSA C/US, IEC Ex, NEPSI |
| Options | Accessory Enclosed: UNI flange 2" ... 4" |
| Application limits | For higher resistance: FMU41/42/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 |
| Accuracy | +/- 3 mm or +/- 0.2 % of set measuring range |
| Ambient temperature | -20 °C ... 60 °C (-4 °F ... 140 °F) |
| Process temperature | -20 °C ... 60 °C (-4 °F ... 140 °F) |
| Process pressure / max. overpressure limit | 0.7 bar ... 3 bar abs (10 psi ... 44 psi) |
| Main wetted parts | PP/EPDM |
| Process connection | G / NPT 1 1/2" G / NPT 2" |
| Blocking distance | Sensor 1 1/2": 0.25 m Sensor 2": 0.35 m |
| Max. measurement distance | Sensor 1-1/2": 2 m (6.6 ft) Sensor 2": 3.5 m (11 ft) |
| Communication | 4...20 mA |
| Certificates / Approvals | ATEX, CSA C/US, IEC Ex, NEPSI |
| Options | Accessory Enclosed: UNI flange 2" ... 4" |
| Application limits | Take notice of range diagram |
The FMU30 is intended only for standard water treatment and has no HART output. If HART output and corrosion resistance are required, use the FMU40 for a 5 m range, the FMU41 for an 8 m range and the FMU42 for a 10 m range.
The FMU30 is used in wastewater treatment plants, for process water tank loading, and for level monitoring of storage and buffer tanks. The FMU30 provides proven software algorithms and a four-line plain text display of warning and alarm messages, ensuring fast fault response. The display also shows the envelope curve, presenting the analysis results directly on site for fast and accurate fault diagnosis.
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
Linearization function (up to 32 points) converts the measured value into length, volume or flow in any unit
Non-contact measurement, minimizing maintenance
Can be installed from thread G1½ or 1½ NPT upwards
Built-in temperature sensor for automatic correction of the temperature-dependent speed of sound
Application areas
For continuous, non-contact level measurement of liquids, pastes, sludge and bulk solids; system integration: 4...20 mA; maximum measuring range: 1½ sensor: liquids: 5 m (16 ft); solids: 2 m (6.6 ft); 2" sensor: liquids 8 m, solids: 3.5 m (11 ft)
Commonly used models:FMU30-AAHEABGHF 8 m and FMU30-AAHEAAGGF 5 m
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Technical information
Technical data
Documents/Manuals/Software
Accessories/Spare parts
Measuring principle video
Source: public information from the Endress+Hauser website
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。
