Static Water Meters: A Smarter Investment for Utilities

Water utilities face mounting challenges: aging infrastructure, limited budgets, and rising customer expectations. One critical decision that affects long-term performance is the choice of water meter technology. While mechanical meters have been the standard, static water meters – using electromagnetic or ultrasonic technology – prove the smarter, more valuable investment.

The Hidden Costs of Mechanical Meters

Mechanical meters may appear cost-effective initially, but long-term costs outweigh the savings. These meters rely on moving parts—pistons, cups, impellers—that degrade over time due to wear, contact with debris (like sand or grit), and mineral buildup. As accuracy declines, especially at low flow rates, utilities lose revenue from unbilled water.

Studies show even top-performing mechanical meters can underreport usage by 3–10% over their lifespan. Maintenance costs- rebuilds, inspections, and part replacements- further strain budgets, especially when managing thousands of meters.

Static Meters: Accurate and Durable

Static meters eliminate the mechanical weaknesses. With no moving parts, they maintain consistent accuracy for up to 20 years, even at low flows—critical as high-efficiency fixtures, like low-flow toilets, become more common.

• Electromagnetic meters (based on Faraday’s Law) use a magnetic field to measure flow continuously and are unaffected by temperature, pressure, or flow disturbances.
• Ultrasonic meters use intermittent pulses of sound waves to calculate flow and are ideal for high-volume commercial and industrial (C&I) applications due to their energy efficiency.

Both technologies deliver reliable data, reduce non-revenue water, and require minimal maintenance.

Technology Tailored to Application

Sensus strategically applies static metering technologies:

• Electromagnetic meters – iPERL®+ and ally® – are used in residential settings, where battery life supports continuous measurement and high accuracy.
• Ultrasonic meters (Cordonel®) serve C&I applications, balancing energy efficiency with precise high-volume measurement.

This tailored approach ensures optimal performance across utility networks.

Sensus Static Meter Portfolio

Sensus offers three advanced static meters:

iPERL+: Designed for residential use, it delivers ±3% accuracy down to 0.05 gpm (0.01m³/hr)-about one drip of a faucet every two seconds. It features a 20-year accuracy guarantee, a 20-year warranty, minimal pressure loss, and smart alarms for leaks, tampering, and empty pipes. Available in polymer or metal flow tube options.

ally: Also for residential use, ally adds advanced control features like a 3-state remote shut-off valve (open, reduced, closed), pressure and temperature monitoring, and helps remote flushing. These capabilities enable faster emergency response and reduce truck rolls. Unlike meters that only reduce flow, ally can fully shut off service.

Cordonel: Built for C&I applications, Cordonel replaces dual-chamber compound meters and installs easily without straight pipe requirements. It uses ultrasonic technology to measure a wide flow range at high precision and includes integrated pressure and temperature sensors for proactive maintenance and accurate billing. Paired with ally -and intuitive software- it enables advanced pressure monitoring across the network in an advanced metering infrastructure (AMI) environment.

Smart Features That Add Value

Modern static meters offer advanced features beyond measurement:

• Pressure and temperature sensors detect leaks, freezing, and anomalies.
• Empty pipe detection identifies breaks or tampering.
• Smart alarms monitor high, continuous, and reverse flow, plus battery and tampering alerts.
• Remote shut-off (in ally) enhances emergency response and operational control.

These features help utilities improve service, reduce costs, and gain deeper system insights.

Total Cost of Ownership: The Real ROI

Static meters offer superior total cost of ownership. Mechanical meters degrade in accuracy and require ongoing maintenance, leading to revenue losses that can approach 5x the original residential meter purchase price over 20 years.

In contrast, static meters provide:

• 20-year accuracy guarantees
• Zero maintenance
• Fewer truck rolls
• Improved billing accuracy
• Greater customer trust

For utilities focused on financial sustainability and operational efficiency, the ROI is clear.

Customer Benefits and Engagement

Static meters also benefit customers:

• Accurate billing ensures fair charges.
• Real-time usage data helps monitor and manage consumption.
• Leak and freeze alerts protect property and reduce disruptions.

To enhance customer engagement, utilities can adopt platforms like VXsmart, offering easy access to water usage data and insights.

Conclusion: A Strategic Shift for Smarter Utilities

Static water meters represent more than a technology upgrade—they’re a strategic investment in the future of water management. With Sensus iPERL+, ally, and Cordonel, utilities gain leading accuracy, longevity, and data capabilities while reducing long-term costs and improving service reliability.

For utilities looking to modernize infrastructure, improve financial performance, and deliver better community outcomes, utilities must recognize the hidden costs of mechanical meters. In the face of water and financial challenges, the case for static metering is not just compelling – it’s essential.

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