Ultrasonic Meters vs Mechanical Meters: The Advantages and Disadvantages 

In the world of water meters, there’s always the same question: stick with the traditional mechanical meters, long-standing fixtures in the industry, or explore the newer ultrasonic counterparts, which still hold some mysteries regarding their benefits? 

For landlords, new apartment block builders, and submetering companies alike, profitability is most important and selecting the appropriate water meter type can be pivotal in achieving this objective. 

Understanding technical nuances in the water meter types can empower you to make informed decisions, ultimately saving you both time and money. 

In this article, we’ll delve into the differences between mechanical meters and smart ultrasonic meters, making comparisons across different segments and guiding you toward the optimal choice for your business needs. 

PRINCIPLE OF OPERATION 

Mechanical Water Meter: Operating on the principle of turbine rotation, these meters utilize designs such as shunts, propellers, or paddle wheels. As water flows through the meter, it triggers the rotation of a piston or turbine. The speed of this rotation directly correlates with the volumetric flow rate of the water, providing a reliable measure of consumption. Mechanical meters are typically calibrated with preset and sealed adjustable devices and are available in various sizes to accommodate different applications.  

However, for optimal performance, the pipeline must maintain a consistent water level, and mechanical meters are most effective when dealing with clean, low-turbidity water, often found in urban water systems. 

Ultrasonic Water Meter: The ultrasonic method is one of the most rapidly developing techniques in numerous sectors because it can identify and react immediately to the smallest changes in any system. Ultrasonic meters utilize high-frequency sound waves to measure water velocity within pipes. By emitting sound waves, the ultrasonic water meter can identify even the smallest changes in speed, reflecting the flow rate. These subtle fluctuations are accurately recorded by the meter, converting them into precise flow data without requiring any physical contact or causing friction. 

ACCURACY 

Mechanical Water Meter: Accuracy can vary depending on factors such as the meter’s age, the quality of its components, and the skill of the person installing and maintaining it. Generally, a mechanical water meter is designed to be accurate within a range of plus or minus 1 to 2 percent. However, wear and tear on parts may necessitate frequent accuracy testing, especially in the presence of silty water, which can diminish their lifespan and require more frequent replacements. 

Ultrasonic Water Meter: One of the key advantages of ultrasonic technology lies in its non-intrusive nature, which minimizes pressure loss and ensures exceptional accuracy, often surpassing international standards. The ultrasonic meter has no moving parts and is less affected by wear and tear. This means that it maintains a high and stable accuracy throughout its entire lifetime, enabling correct billing and better data quality.

 

ALERTS 

Mechanical Water Meters: Typically, do not provide advance warning of freezes, leaks, or burst problems. 

Ultrasonic Water Meters: Tend to have smart features and can send alert messages to the data collection system allowing users to be notified by phone or email about water leaks, bursts, or freezes. For example, Axioma Metering’s ultrasonic meters have advanced algorithms that enable exceptional leak detection capabilities, ensuring that any anomalies in flow patterns are promptly flagged for attention. This proactive approach not only saves costs but also promotes responsible water management practices. 

DATA COLLECTION:  

Mechanical Water Meters: Data is usually collected manually once a month or even more rare if the utility is relying on the resident to register the meter readings which can also be approximate or inaccurate.  

Ultrasonic Water Meter: Usually comes with an option to send data wirelessly through long range wide area network (LoRaWAN).  

MAINTENANCE 

Mechanical Water Meter: Involves regular inspections, cleaning, and calibration as it may degrade over time due to mechanical wear and the buildup of debris or minerals in the meter. Usually, scheduled technician visits are required according to government regulations (for example, every 5-6 years). 

Ultrasonic Water Meter: Requires less maintenance since it has no moving parts that can wear out. Periodic calibration may be necessary to maintain accuracy. Battery lifetime depends on communication settings but could be around 16 years. 

COSTS: 

Mechanical Water Meter: Lower initial investment but may incur higher long-term costs due to maintenance, manual reading, and potential inaccuracies leading to revenue loss for utilities. 

Ultrasonic Water Meter: Initial cost tends to be higher due to the advanced technology involved. However, savings can be realized over time through improved accuracy, reduced water loss from leaks, and lower maintenance costs. By eliminating the need for manual meter reading, these meters streamline operations for utility companies, potentially reducing costs and improving efficiency. 

RELIABILITY: 

Mechanical Water Meters: Have been used in the industry for many years. One potential drawback is that they contain moving parts, such as pistons, gears, or turbines, which can wear out over time and require maintenance or replacement. They are more sensitive to damage from external factors such as water impurities, debris, or tampering, which can affect their accuracy and reliability. 

Ultrasonic Water Meters: Considered highly reliable due to their non-intrusive design and minimal moving parts. They offer stable and accurate measurement over long periods without significant degradation, and they are not so sensitive to damage from water impurities, debris, or tampering. As they don’t have moving parts that can wear out or be prone to mechanical failure, they reduce the risk of malfunctions and minimize maintenance requirements. Ultrasonic meters have a longer lifespan compared to mechanical meters, as they are less prone to wear and tear. With proper maintenance, ultrasonic meters can provide reliable measurement for many years. 

MOUNTING ORIENTATION: 

Mechanical Water Meter: Can be mounted horizontally or vertically, depending on the meter or application. 

Ultrasonic Water Meter: Offers greater flexibility in mounting positions compared to mechanical meters. They can be installed horizontally, vertically, or even diagonally, depending on the specific requirements of the application. 

SUSTAINABILITY: 

Mechanical Water Meter: Without active alert notifications, users can’t detect water leaks, bursts that could impact the environment and drinking water scarcity. 

Ultrasonic Water Meter: Play a crucial role in promoting sustainable water management practices, ensuring that every drop is accounted for and conserved for future generations. Advanced alerts in the ultrasonic water meter enable quick leak detection and lower the amount of non-revenue water. The faster a leak is detected and stopped; the less water is lost because of it. Ultrasonic meters also provide users with transparent and almost real-time insights into their water consumption, empowering them to make informed decisions about conservation efforts. 

Comparison of Mechanical Water Meter and Smart Ultrasonic Water Meter

Summarized comparison of ultrasonic water meters vs. mechanical water meter:  

	Ultrasonic Water Meter	Mechanical Water Meter
Principle of operation	Utilizes ultrasonic technology to measure water flow	Operates based on mechanical gears and dials, turbine or a piston
Accuracy	Offers higher accuracy due to its advanced technology	May degrade over time due to mechanical wear and buildup of debris or minerals in the meter
Maintenance	Less maintenance since it has no moving parts that can wear out periodic calibration may be necessary to maintain accuracy.	Scheduled technician visits according to government regulations (every 5-6 years)
Reliability	Highly reliable due to their non-intrusive design and minimal moving parts	Has drawbacks due to many moving parts. Sensitive to to damage from debris in the water, temperature fluctuations, and physical wear on moving parts, which can lead to degradation in performance and accuracy over time.
Data Collection	Remote, almost real-time data.	Manual reading, usually done by a customer once a month.
Alerts	Sends alerts about waters leks, freezes, bursts	Don’t sent notifications
Costs	Initial cost tends to be higher due to the advanced technology involved. However, savings can be realized over time through improved accuracy, reduced water loss from leaks, and lower maintenance costs.	Lower initial cost but may incur higher long-term costs due to maintenance, manual reading, and potential inaccuracies leading to revenue loss for utilities.
Mounting Orientation	Any angle	According to specific instructions
Sustainability	Highly accurate leak detection and nearly real-time data ensure effective utility operations and water resource conservation.	Water leaks that are not detected cause environmental issues and waste drinking water resources.

How to choose the right water meter for a business? 

Selecting the ideal water meter for your business requires careful consideration of several factors to ensure optimal performance and efficiency.  

1. Evaluate your specific needs and usage patterns to determine the appropriate meter size and type. Consider factors such as flow rate requirements, water quality, and the presence of any contaminants or particles in the water supply.  

2. Assess the accuracy and reliability of the meter, as precision is essential for accurate billing and resource management. Look for meters with proven track records of performance and adherence to industry standards, such as ISO certifications.  

3. Consider the maintenance requirements and long-term costs associated with each meter type. While mechanical meters may offer initial affordability, they may require more frequent maintenance in the presence of impurities, whereas smart ultrasonic meters boast advanced features like leak detection and remote monitoring, potentially reducing long-term operational costs.  

4. Prioritize meters from reputable manufacturers known for their quality and customer support, ensuring peace of mind and reliable performance for years to come. Always ask for professional consultation to help you make a smart decision. By carefully evaluating these factors, you can confidently choose the best water meter to meet your business’s unique requirements and goals. 

Conclusion: 

To sum up, ultrasonic water meters have many advantages compared to mechanical water meters. Their non-intrusive ultrasonic technology offers exceptional accuracy, efficiency, and advanced features such as leak detection, making them a preferred choice for businesses seeking precise water measurement and effective resource management.  

While mechanical meters remain a cost-effective option, their sensitivity to clogging, limitations in accuracy, maintenance costs, highlight the superior performance and long-term benefits of ultrasonic meters. Ultimately, the decision between the two depends on factors such as water quality, flow rates, maintenance considerations, and budgetary constraints.  

Deepen your knowledge about how ultrasonic flow meters work or reach out to us if you are seeking professional advice: info@mainlink.net