ALSONIC-DSP
Digital Multi-Channel, Transit Time Ultrasonic Flow Meter
Accurate, clamp-on measurement you can trust — even in wastewater, oil, and harsh conditions where other meters fail.
- Measures velocities of ±0.01 – ±20 m/s for both clean and dirty liquids
- Dual path for accuracy of ±0.5% of reading
- Non-intrusive clamp-on installation
- Measures up to 30% bubbles/particles
Starting At: $3,000
IN STOCK – Available to ship *
Backed by ISO-certified accuracy and 20+ years of flow measurement expertise.
The SmartMeasurement ALSONIC DSP is engineered to deliver reliable results in any liquid condition — from clean water to heavily contaminated flows with up to 30% bubbles or solids.
Unlike Doppler meters, it uses patented transit-time technology for non-intrusive, clamp-on measurement across wastewater, oil, gas, petrochemical, and other demanding applications.
Dual-path design provides ±0.5% accuracy, while the unique waveform display verifies measurement integrity in real time.
Accuracy: 0.5% – 1% of reading
Installation: Non-intrusive clamp-on
Pipe Size Range: ¾”-240″ (20-6000 mm) line sizes
Flow Velocity: ±0.01–±20 m/s
Temperature Range: -22~+248 °F (-30 ~ +120˚C)
Liquid Types: Clean or dirty with up to 30% bubbles/particles
Looking for a portable version? See our Portable Multi-Channel Ultrasonic Flow Meter
Take the proven precision of SmartMeasurement’s ALSONIC-DSPPL into the field. The Portable Transit-Time Flow Meter delivers the same ±0.5% accuracy, ability to handle clean or dirty liquids (up to 30% bubbles/solids), and multi-channel visibility, but with the added convenience of a lightweight, clamp-on design you can take anywhere.
Whether you’re auditing flow across multiple sites, troubleshooting system performance, verifying existing meters, or conducting short-term studies, this rugged portable unit gives you instant, non-invasive readings without downtime or pipe cutting.
Takes you to details for our portable DSPPL model.
Proven Across Industries & Applications
Trusted in wastewater, oil & gas, utilities, and more for 20+ years.
| Industry | Use Case |
|---|---|
Wastewater & Sewage |
Handles up to 30% bubbles/solids for accurate, non-intrusive measurement of unpredictable wastewater flows where most ultrasonic meters fail. |
Oil & Gas |
Delivers ±0.5% accuracy for clean or dirty crude and refined fuels, with non-intrusive clamp-on design that reduces installation and maintenance costs. |
Petrochemical |
Measures fluids with up to 30% particulates/bubbles, ensuring reliable flow data across changing petrochemical streams, with full data logging and connectivity. No media contact, no leakage risk. |
Utilities |
Retrofits easily onto cooling water and boiler feed lines, giving accurate flow data without downtime or pipe cutting. |
Energy & Building Automation |
Monitors chilled/hot water loops for HVACs with BTU/energy options; multi-channel models cover several lines at once. |
Food & Beverage |
Ensures sanitary measurement of process water, CIP, and additives with clamp-on, contamination-free sensors. |
Pharmaceutical & Biotech |
Accurate for DI and ultrapure water, with onboard data logging and compliance-ready calibration for regulated use. |
Not sure if this works for your application?
Detailed Features and Benefits
Engineered for accuracy, verified by NIST certification, and backed by 20+ years in flow measurement.
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Accuracy & Certification
- NIST-traceable calibration certificate included
- High accuracy: ±1.0% of reading (single path); ±0.5% of reading (dual path)
- Fine Time Measurement Technology (patented) for drift-free readings
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Diagnostics & Stability
- Oscilloscope function for signal diagnostics
- AR (Anti-Round) Mode (patent pending) for improved measurement stability
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Usability & Data Logging
- Digital flow meter
- Color Graphic LCD Display (128×64) showing flow rate, total flow, and signal shape
- 32 MB memory with capacity for more than 1,000,000 data points
- Data logger function with date, totalizer, and diagnostics storage
- Fast response time: less than 1 second
- Digital flow meter
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Versatility
- Measures velocities from 0.03 ~ 66 ft/sec (±0.01 ~ ±20 m/s)
- Works with clean or dirty liquids containing up to 30% bubbles or solids, including wastewater and slurries
Why Choose SmartMeasurement?
Measure Clean & Dirty Water
Guarantees accurate fluid measurement, regardless of condition.
Handle Multiphase Flows
Transit-time ultrasonic meter measure up to 30% bubbles/particles
Achieve High Accuracy
Dual-path ±0.5%, NIST-certified reliability.
Non-Intrusive Clamp-On Installation
Clamp-on design cuts install time by 70% vs. inline meters.
Robust Data Logging & Output Options
USB port or RS485/232 and MODBUS RTU measures and graphically outputs flow rates, total flows, temperature, velocity, and more.
See How the ALSONIC-DSP Fits Your Application
Multi-Channel Ultrasonic Flow Meters Technical Specifications
| Accuracy | ±1% of reading (single path), ±0.5% of reading (dual path) |
| Repeatability | ±0.2% of reading |
| Response Time | < 1 second |
| Flow Velocity Range | 0.03–66 ft/sec (±0.01–±20 m/s) |
| Measuring Principle | Transit-time ultrasonic |
| Pipe Size |
XLA Type: 1/5″–1″ (6–30 mm) XLB Type: 3/4″–3″ (20–80 mm) XLC Type: 2″–12″ (50–300 mm) XLD Type: 12″–40″ (300–900 mm) XLE Type: 20″–118″ (500–3000 mm) XLF Type: 78″–236″ (2000–6000 mm) |
| Pipe Materials | Cast iron, stainless steel, ductile iron, copper, PVC, aluminum, asbestos, fiberglass |
| Liner Materials | Tar epoxy, rubber, mortar, polypropylene, polystyrene, polyester, ebonite, polyethylene, Teflon® |
| Display |
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| Keypad & Interface | Touchscreen with color graphic LCD |
| Power Consumption | < 20 W |
| Required Straight Run | Single path: 10D upstream, 5D downstream Dual path: 5D upstream, 3D downstream |
| Alarm Outputs | Two relays (total, hi/low) |
| Protection Rating |
Transmitter: NEMA 4 (IP65), NEMA 4X (IP67) Explosion-proof options Transducer: IP68 (submersible) |
Trusted by engineers for ±0.5% accuracy — NIST-certified.
Jump to Standard Transducers | Insertion Transducers | Mounting Tracks
Select the Correct Transducer for Your Pipe Size & Application
SmartMeasurement offers both standard and insertion transducers to cover pipe sizes from ¾″ to 236″ and temperature ranges from –40 to +250 °F.
Standard Transducers
Fluid Temperature: -5 ~250 °F (–20 to +120 °C)
| Model | a (mm) | b (mm) | c (mm) | d (mm) | Nominal Pipe Size |
| XLB | 23 (0.90″) | 42 (1.65″) | 37 (1.45″) | 63 (2.48″) | 3/4″–3″ (DN20–80 mm) |
| XLC | 35 (1.38″) | 60 (2.36″) | 45 (1.77″) | 72 (2.83″) | 2″–12″ (DN50–300 mm) |
| XLD | 35 (1.38″) | 93 (3.66″) | 50 (1.97″) | 86 (3.38″) | 12″–35″ (DN300–900 mm) |
| XLE | 51 (2.00″) | 145 (5.70″) | 76 (3.00″) | 111 (4.37″) | 20″–118″ (DN500–3000 mm) |
| XLF | 51 (2.00″) | 145 (5.70″) | 76 (3.00″) | 111 (4.37″) | 78″–236″ (DN2000–6000 mm) |
Insertion Transducers
| Model | Pipe Size | Temperature Range |
| XIS (Standard) | 2″–20″ (DN50–500 mm) | –40 to 250 °F (–40 to +120 °C) |
| XIL (Large) | 20″–240″ (DN500–6000 mm) | –40 to 250 °F (–40 to +120 °C) |
Mounting Track Dimensions
| Model | a (mm) | b (mm) | c (mm) | d (mm) |
| M-XLB | 30 (1.18″) | 280 (11.00″) | 23 (0.90″) | 23 (0.90″) |
| M-XLC | 40 (1.57″) | 380 (14.96″) | 35 (1.38″) | 43 (1.69″) |
| M-XLD | 40 (1.57″) | 700 (27.55″) | 35 (1.38″) | 43 (1.69″) |
| M-XLE | 40 (1.57″) | 380 (14.96″) | 51 (2.00″) | 70 (2.75″) |
SmartMeasurement’s ALSONIC-DSP is trusted worldwide for accuracy, versatility, and ease of installation — backed by 20+ years of flow measurement expertise.
Not sure which transducer fits your system?
ISO-certified | NIST-traceable accuracy | Thousands of installations worldwide
* Select sizes and configurations ready to ship; all other non-stock configurations are produced on a build-to-order basis.
