Ultrasonic liquid level monitoring plays a vital role in maintaining optimal performance within industrial refrigeration systems. Accurate liquid level measurement is essential for system safety, efficiency, and long-term reliability across various industries.
In this project, Coltraco is working with a major supermarket chain to improve how liquid levels are monitored within refrigeration applications, using ultrasonic level sensors to deliver accurate data without intrusive installation.
Overview of the Development Programme
Coltraco is supporting an ongoing programme focused on ultrasonic liquid level monitoring within industrial refrigeration environments.
The application centres on horizontal tank vessels (~80L) using HFC refrigerant (R448A). These vessels are essential components within refrigeration systems, where maintaining consistent performance depends on reliable level measurement.
The objective is to monitor and measure liquid levels using non contact ultrasonic level sensors, enabling real time monitoring across a range of operating conditions.
The Challenge: Monitoring in Dynamic Refrigeration Environments
Refrigeration systems operate under constantly changing conditions, where liquids move within vessels due to pressure, temperature variation, and system demand.
This creates challenges for liquid level sensors:
- Turbulence affects the surface of the liquid medium
- Measurement accuracy can vary depending on system conditions
- Moisture, temperature, and pressure all influence acoustic behaviour
- Traditional sensors struggle to maintain reliability
As a result, it becomes difficult to detect stable readings or maintain accurate level measurement across different models and system setups.
The Objective: Reliable, Continuous Liquid Level Monitoring
The requirement was to develop a device capable of:
- Providing continuous ultrasonic liquid level monitoring
- Delivering high accuracy measurements across varying conditions
- Operating without contact with the liquid or vessel material
- Maintaining consistent performance across refrigeration systems
The system needed to measure level with confidence, even where external factors such as temperature, pressure, and turbulence vary during operation.
The Solution: Non-Invasive Ultrasonic Liquid Level Monitoring System
Coltraco are developing a system using ultrasonic level sensors mounted externally on refrigeration vessels.
This non contact method uses sound waves to detect the liquid surface and measure the distance between the sensor and the liquid level inside the tank.
The technology acts as a transducer, converting ultrasonic waves into usable measurement data, allowing accurate monitoring without interfering with system operation.
How the System Works
The ultrasonic liquid level monitoring process follows a defined method:
- Ultrasonic level sensors are mounted on the outside of the vessel
- The device generates high-frequency sound waves through the vessel wall
- These waves travel through the material and reflect from the liquid surface
- The system measures the time difference between emitted and returned signals
This allows the system to detect and measure liquid levels accurately across different operating conditions.
Measurement in Turbulent Conditions
In refrigeration applications, liquid behaviour is rarely stable.
To maintain measurement accuracy, the system uses rapid sampling and signal processing to:
- Filter unreliable readings caused by turbulence
- Detect valid measurement signals
- Maintain accuracy despite varying factors such as pressure and temperature
This improves reliability and ensures accurate data even in dynamic environments.
Compensation for Changing Conditions
The system adjusts automatically to changes in operating conditions.
This includes compensation for:
- Temperature changes affecting the medium
- Pressure fluctuations within the vessel
- Variations in acoustic properties of refrigerant liquids
This ability helps maintain high accuracy across a wide range of industrial refrigeration systems.
Key System Features
The system has been designed with features suited to refrigeration environments:
- Non contact ultrasonic liquid level sensors
- Continuous real time monitoring
- High measurement accuracy across varying conditions
- Suitable for different models of refrigeration systems
- Mounted externally with simple installation
- Robust performance across a range of vessels
Data Capture and Integration
The system provides continuous level measurement and trend data.
This enables operators to:
- Monitor liquid levels in real time
- Detect anomalies or faults early
- Maintain system performance
- Improve operational reliability
Data output is connected via a 0–5V signal, making the unit compatible with building management systems and other connected monitoring systems.
Supporting Predictive Maintenance
With accurate data and continuous monitoring, operators gain the ability to move towards predictive maintenance.
This supports:
- Reduced downtime
- Better control of system operation
- Improved reliability across refrigeration systems
The ability to detect small changes in level or performance is critical in maintaining long-term system efficiency.
Expected Impact on Refrigeration Operations
The introduction of ultrasonic liquid level monitoring provides several benefits:
- Improved measurement accuracy
- Consistent performance across systems
- Reduced operational costs
- Better system control and efficiency
These benefits help maintain optimal performance across industrial refrigeration applications.
Strategic Relevance Across Industries
Ultrasonic liquid level monitoring plays a vital role across various industries, not just retail refrigeration.
For example, similar systems are used in:
- Industrial tanks
- Processing environments
- Transport and storage systems
In each case, the ability to measure liquids accurately without contact improves reliability and operational performance.
Speak to Coltraco About Ultrasonic Monitoring Systems
Coltraco provides ultrasonic monitoring systems suited to refrigeration and other industrial applications.
If you are looking to monitor liquid levels, improve measurement accuracy, or maintain system performance, speak to Coltraco about how this technology can be applied within your setup.
