Ultrasonic Flow Meters
Experience the SmartMeasurement advantage with our state-of-the-art ultrasonic flow meters. Engineered for excellence, our range covers permanent and portable clamp-on solutions, open channel systems, and water & energy meters—all designed to deliver unparalleled precision, reliability, and hassle-free, non-intrusive monitoring for every application.
Ideal for measuring liquid flow in industries like water management, oil and gas, HVAC, and industrial processing, our ultrasonic meters utilize transit-time or Doppler technology to ensure precision with both clean and particle-laden fluids. With no moving parts and minimal maintenance requirements, these meters provide long-lasting reliability and high efficiency.
Choose SmartMeasurement for cutting-edge ultrasonic meter solutions designed to optimize fluid measurement and streamline operations.
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Types of Ultrasonic Flow Meters
Offers precise, non-invasive flow measurement by clamping onto the outside of pipes. Ideal for permanent installations, it ensures accurate monitoring without disrupting flow. Commonly used in water management, HVAC systems, and industrial processing.
Delivers accurate flow measurement on the go with a lightweight, easy-to-install design. Perfect for temporary monitoring, maintenance checks, and flow verification. Widely used in municipal water systems, HVAC, and industrial audits.
Provides accurate flow measurement in open channels and partially filled pipes. Uses ultrasonic pulses to calculate flow velocity and depth. Ideal for wastewater treatment, environmental monitoring, and irrigation systems.
Measures thermal energy flow in HVAC and cooling systems with high precision. Tracks heating and cooling energy usage for improved efficiency. Widely used in commercial buildings, industrial facilities, and energy management applications.
Why Choose SmartMeasurement?
High Accuracy
Achieve precise readings with advanced ultrasonic technology, even in challenging conditions.
Energy Efficient
Consumes minimal power while delivering reliable performance.
Low Maintenance
No moving parts minimize wear and tear, lowering maintenance costs.
Versatile Applications
Suitable for liquids and some gases making them adaptable across industries.
Non-Invasive Measurement
Measure flow without disrupting the pipeline, reducing downtime and maintenance.
Features of Ultrasonic Flow Meters
Clamp-On Design
Easily install without cutting pipes or interrupting flow.
Bidirectional Measurement
Accurately track flow in both directions for complete data monitoring.
Wide Range of Sizes
Compatible with various pipe diameters, from small to large. Ability to measure up to 30% particles/bubbles.
Multi-Parameter Measurement
Simultaneously measure flow rate, velocity, volume and more.
Digital Output Options
Integrate with existing systems for real-time data analysis.
How Ultrasonic Flow Meters Work
Transit-Time Measurement for Clean Fluids
At SmartMeasurement, our ultrasonic meters harness advanced acoustic technology to deliver precise, non-intrusive flow measurements. Using our proprietary transit-time method, dual transducers send high-frequency ultrasonic pulses both with and against the direction of fluid flow.
The resulting difference in transit times—captured by our state-of-the-art signal processing algorithms—translates directly into accurate fluid velocity and volumetric flow rate data, ensuring optimal performance in clean water and low-particulate applications.
Doppler Technology for Particle-Rich Environments
In addition, select SmartMeasurement models employ Doppler technology to tackle more challenging environments. In these systems, ultrasonic signals reflect off particles or bubbles within the fluid, generating a measurable frequency shift known as the Doppler shift.
Our cutting-edge electronics interpret this differential signal to provide reliable flow detection, even in particle-rich or bubbly conditions.
Applications of Ultrasonic Flow Meters
Our ultrasonic flow meters are engineered to excel across a diverse range of industries and applications — ensuring accurate flow monitoring in any environment.
Water Treatment & Municipal Systems
Monitor flow rates in clean and treated water for reliable municipal and industrial operations.
HVAC & Building Automation
Optimize thermal energy use and track BTU flow in heating and cooling systems.
Chemical & Industrial Processing
Accurately measure flow in corrosive, heated, or multi-phase process fluids.
Oil & Gas Production & Refining
Handle high-pressure or particulate-heavy fluids in upstream and downstream operations.
Case Study Snapshot: A municipal water treatment facility reduced downtime by 35% after switching to SmartMeasurement’s clamp-on ultrasonic flow meters with Doppler technology. The non-invasive design allowed for real-time monitoring of sediment-heavy flows without pipe modification or process interruption.
Featured Products
Explore a selection of our most popular ultrasonic flow meters, trusted across industries for accurate, non-intrusive measurement.
ALSONIC PL
- Size Range: 1"-48" (25-12000 mm) line sizes
- Temperature Range: -22~+230 °F ( -30 ~ +110˚C)
- Accuracy: 1-2% of reading
- Applications: Water, HVAC, MRO
- Starting At: $1,600
ALSONIC DDPL
- Size Range: (Std) ½" - 240" (15-6000 mm) line sizes
- Temperature Range: -22~+302 °F ( -30 ~ +150˚C)
- Accuracy: 2 - 5% of reading
- Applications: Wastewater, drilling mud, any portable application with high solids count
- Starting At: $3,000
ALSONIC MINI
- Size Range: ½"-2" (15-50 mm) line sizes
- Temperature Range: 32~+122 °F ( -0 ~ +50˚C)
- Accuracy: 2% of reading
- Applications: Chemical, DI-water, corrosive fluids
- Starting At: $500
ALSONIC EG
- Size Range: Sizes 1-48" (25-1200 mm)
- Temperature Range: -22~+230 °F (-30 ~ +110˚C)
- Accuracy: 1% - 2%
- Applications: Water, clean liquids , chillers, HVAC, heat exchangers
- Starting At: $1,200
ALSONIC PLEG
- Size Range: 1-48" (25-1200 mm) line sizes
- Temperature Range: -22~+230 °F (-30 ~ +110˚C)
- Accuracy: 1% - 2%
- Applications: Portable energy/BTU meter for building automation, HVAC, chillers, heat exchangers
- Starting At: $2500
Ultra Low-flow, Small Line Size
ALSONIC MN2 (ALsonic-MINI 2)
- Size Range: (Std) 3/8"~1 ½ " (DN10~DN40), (Opt) 1/4" (DN8)
- Temperature Range: (Std) -10°C~65°C (Non-frozen), (Opt) -10°C~105°C (Non-frozen)
- Accuracy: (Std) 3%FS, (Opt) 1.5%FS
- Applications: Food & Beverage, Automotive, Chemical processing, and dosing/mixing applications
ALSONIC FX
- Size Range: ½"-48" (15-12000 mm) line sizes
- Temperature Range: -22~+230 °F (-30 ~ +110˚C)
- Accuracy: 1% - 2% of reading
- Applications: Water, factory automation, HVAC
- Starting At: $1,000
ALSONIC EG
- Size Range: Sizes 1-48" (25-1200 mm)
- Temperature Range: -22~+230 °F (-30 ~ +110˚C)
- Accuracy: 1% - 2%
- Applications: Water, clean liquids , chillers, HVAC, heat exchangers
- Starting At: $1,200
ALSONIC DSP
- Size Range: ¾"-240" (20-6000 mm) line sizes
- Temperature Range: -22~+248 °F (-30 ~ +120˚C)
- Accuracy: 0.5% - 1% of reading
- Applications: Oil & gas, water, wastewater, marine, power/utility
- Starting At: $3,000
ALSONIC DDPL
- Size Range: ½" - 240" (15-6000 mm) line sizes
- Temperature Range: -22~+302 °F (-30 ~ +150˚C)
- Accuracy: 2% - 5% of reading
- Applications: Wastewater, drilling mud, any portable application with many particles
- Starting At: $3,000
ALSONIC-AVM
- Size Range: Sizes 3'-130' (1-40 m)
- Temperature Range: Ambient, transducers can withstand temperatures of 248°F (120°C)
- Accuracy: 0.5-1%
- Applications: Open channel; clean and dirty water
- Starting At: $8,000
ALSONIC-SAVM
- Size Range: Sizes 6''-48" (100-1200 m)
- Temperature Range: Ambient, transducers can withstand temperatures of 248°F (120°C)
- Accuracy: 0.5-1%
- Applications: Clean or dirty sewers
- Starting At: $8,000
ALSONIC-DAVM
- Size Range: Sizes 6"-240" (150-6000 mm)
- Temperature Range: Ambient, transducers can withstand temperatures of 248°F (120°C)
- Accuracy: 2-5%
- Applications: Economic open channel monitoring, mainly used for sewers and surveying
- Starting At: $5,000
ALSONIC-RAVM
- Size Range: Level 0-70 meters channel up to 100 meters
- Temperature Range: Seal proof dew and condensate <65C enclosure IP68 or IP67
- Accuracy: +/- 0.01m/s +/-1%
- Applications: Rivers, lakes, tides, reservoir gates, sewage pipe networks, irrigation channels, etc.
- Starting At: $6,000
ALSONIC BAEG
- Size Range: ½-12" (15-300mm) line sizes
- Temperature Range: 32-195 °F (0 ~ +90˚C)
- Accuracy: 1% - 2%
- Applications: BTU, sub-metering, building automation, HVAC, chillers
- Starting At: $200
SmartMeasurement Ultrasonic Flow Meters FAQ
How does an ultrasonic flow meter work?
At SmartMeasurement, our ultrasonic flow meters use high-frequency ultrasonic pulses from dual transducers mounted on opposite sides of the pipe. The transit-time method measures the time difference of pulses traveling with and against the liquid flow, while Doppler models detect frequency shifts from gas bubbles or suspended particles. This method provides reliable flow measurement for both clean and aerated liquids.
What is the difference between an ultrasonic flow meter and an electromagnetic flow meter?
Electromagnetic flow meters rely on electrical conductivity to measure liquid flow and are limited to conductive fluids. In contrast, ultrasonic flow meters use ultrasonic waves, making them suitable for both conductive and non-conductive liquids, including applications in chemical processing and wastewater industries. Ultrasonic meters are a non-intrusive flow meter while magnetic meters are installed between pipes.
What are the disadvantages of an ultrasonic flow meter?
Ultrasonic flow meters may be less effective with dirty liquids or heavy fouling on the pipe wall, and they can struggle in highly turbulent flows or at very low liquid flow rates where ultrasonic signals become less distinct. However Smartmeasurement’s AlsonicDSP family of products having high frequency with its advanced algorithm are able to measure dirty liquids of up to 30% bubbles or particles. While the ability to average two independent flow paths, can mitigate the effect of turbulent flows..
How far away should an ultrasonic flow meter be mounted from the pipe?
SmartMeasurement’s clamp-on ultrasonic meters are designed for direct application on the pipe wall. The optimal transducer spacing depends on the pipe size and manufacturer’s installation guidelines, ensuring accurate flow measurement without modifying the internal liquid.
How far can ultrasonic signals detect in flow measurement?
The effective detection range of ultrasonic signals depends on pipe material, diameter, and fluid properties. Generally, these ultrasonic sensors work reliably across standard pipe sizes, ensuring accurate measurement of flow rate and average velocity in diverse industrial and commercial settings.
What is the difference between an ultrasonic flow meter and a rotameter?
Rotameters use a floating element in a tapered tube to measure flow, whereas ultrasonic flow meters use sound waves and ultrasonic pulses. This non-intrusive, solid state technology offers higher precision, lower maintenance, and direct measurement of average velocity.
Can an ultrasonic flow meter measure air flow?
While most ultrasonic meters are optimized for liquid flow measurement, specialized models are engineered to measure air flow. These units account for the lower density and unique acoustic properties of gases, ensuring accurate monitoring.
How accurate are SmartMeasurement’s ultrasonic flow meters?
SmartMeasurement’s ultrasonic sensors deliver high accuracy—often within a few percentage points—by measuring average velocity and volumetric flow through precise ultrasonic pulses. Rigorous factory calibration and routine verification ensure consistent performance in both residential and commercial applications.
Do ultrasonic flow meters require calibration?
Our devices come factory-calibrated for accurate liquid flow rate measurement and require minimal field calibration. Periodic checks are recommended for critical process control applications to maintain reliable performance over time.