1. Project Background
A municipal wastewater treatment plant required continuous level monitoring of its process tanks to support daily operation management and pump control.
The monitored tanks were open structures containing turbid water, and the site operated under long-term high-humidity conditions.
To ensure stable and reliable level measurement without direct contact with the liquid, the plant selected the KUM-A ultrasonic level sensor for this application.
2. Measurement Challenges
The main challenges of the application included:
● Open tanks with fluctuating liquid levels
● Turbid water conditions unsuitable for contact-type sensors
● High ambient humidity affecting equipment reliability
● Requirement for stable and continuous level signals
● Simple installation and low maintenance expectations
The project focused on operational reliability rather than complex measurement functions.
3. Solution
To meet these requirements, the KUM-A integrated ultrasonic level sensor was applied for wastewater tank level monitoring.
Using non-contact ultrasonic measurement, the sensor determines liquid level by measuring the distance between the sensor and the liquid surface, avoiding direct exposure to wastewater.
3.1 Equipment Configuration
The system configuration included:
● KUM-A integrated ultrasonic level sensor
● Industrial-grade housing suitable for humid environments
● Bracket mounting at the edge of the tank
● Analog signal output connected to the plant control system
The compact structure allowed easy installation and straightforward maintenance.
3.2 Key Technical Specifications
| Parameter | Specification |
| Measuring Range | Up to 5 m |
| Measurement Accuracy | 0.5% – 1.0% |
| Blind Zone | 0.30 – 0.40 m |
| Ambient Temperature | -20 ～ +60 ℃ |
| Protection Class | IP66 |
3.3 Implementation Process
Equipment setup
The KUM-A sensor was mounted on a fixed bracket at the edge of the wastewater tank, with the sensor face oriented vertically toward the liquid surface.
Measurement process
The sensor continuously monitors the liquid level and outputs a stable analog signal to the control system for operational reference.
Operation & maintenance
Routine inspections are performed during regular site checks. No frequent cleaning or complex maintenance is required.
4. Project Results
After commissioning, the KUM-A ultrasonic level sensor has been in continuous operation for over 6 months in the wastewater treatment process tank, demonstrating stable and reliable performance.
| Evaluation Item | Actual Performance |
|---|---|
| Measurement Stability | Continuous 24-hour operation with level fluctuation ≤ ±10 mm |
| Repeatability | Measurement deviation ≤ 1% under repeated level changes |
| Environmental Adaptability | Stable operation under long-term high humidity (>85% RH) |
| Signal Output Stability | Smooth analog signal output without noticeable fluctuations |
| False Alarms | No false alarms caused by turbidity or surface disturbances |
| Maintenance Frequency | No disassembly required; routine inspections only |
| Installation & Commissioning | Single-point installation completed in < 30 minutes |
| Operational Reliability | Continuous fault-free operation meeting site requirements |
Operational Feedback
During long-term operation, the KUM-A ultrasonic level sensor maintained stable performance despite frequent level changes, turbid water conditions, and high humidity. It provided reliable level data for pump control and process management.
5. Conclusion
The application of the KUM-A ultrasonic level sensor provided a practical and reliable solution for wastewater treatment plant level monitoring.
Its non-contact measurement principle, simple installation, and stable performance make it well suited for open wastewater tanks and similar industrial water level applications.
For more technical details, wiring diagrams, or model selection guidance, please click here to learn more or contact our technical team.
