Ultrasonic flow meters provide reliable and precise flow measurement for small quantities. They are suitable for use in development work by engineers as well as for demanding measurement tasks in a wide range of industrial companies and sectors, such as the chemical, pharmaceutical and food industries.
DDM ultrasonic flow meters are highly precise, easy to install, and maintenance-free, making them versatile for various applications.
Advantages of our ultrasonic flow meters at a glance
DDM Sensors’ ultrasonic flow meters provide multiple benefits, delivering precise measurement results, optimizing processes, and increasing efficiency:
- Precision and reliability: The patented “Time-of-Flight” ultrasonic technology ensures accurate and stable measurements, even at flow rates as low as 2 ml/min. An outstanding signal-to-noise ratio of up to 3000:1 guarantees a stable zero point condition and minimizes measurement errors.
- Large measuring range – flexibility for versatile applications: Our ultrasonic flow meters impress with their exceptionally large measuring range of 0.002 to 20 l/min. This versatility enables precise measurements both at minimum flow rates and at higher flows – ideal for a wide range of industrial applications.
- Effortless installation and maintenance: The sensors follow a “plug-and-play” principle, requiring only short inlet sections. As they have no moving parts, they are maintenance-free and have a long service life.
In our practical guide to ultrasonic flow meters for small quantities, you will find many more details on areas of application, special features, “time-of-flight” technology and installation and maintenance.
excl. 19% VAT plus shipping costs
Connection: 3/8” John Guest, 1/2” BSP, 1/2” NPT
Measurement range: 2 … 500ml/min to 0,1 … 20l/min
Repeatability: ±0.1% (25 to 100% v.MB); ±0.5% (< 25 v.MB)
Material of wetted parts: PEEK / 316 ; PEEK / Borosilikatglas
Output: Impuls (NPN or PNP); 4 – 20mA; 0 – 10V; 0 -5V; Display
Temperature range: -10 – 60°C, -10 – 110°C
Data sheet: pdf | 1 MB
excl. 19% VAT plus shipping costs
excl. 19% VAT plus shipping costs
Connection: 1/8” & 1/4″ hose
Measurement ranges: 20 … 1000 ml/min & 100 … 5000 ml/min
Repeatability: ±0.1% plus ±0.02% FSD
Material of wetted parts: PFA hose with FDA approval
Output: Impuls (NPN or PNP); 4 – 20mA; 0 – 10V; 0 -5V; Display
Temperature range: -10 – 60°C
Data sheet: pdf | 1,003 KB
excl. 19% VAT plus shipping costs
excl. 19% VAT plus shipping costs
Connection: ¼” BSP
Measurement range: 2 … 500ml/min to 0,1 … 15l/min
Repeatability: ±0.1% +0.005% FSD
Material of wetted parts: 316 and PEEK
Output: Impuls (NPN or PNP);
Data sheet: pdf | 372 KB
Manuel: pdf | 2 MB
excl. 19% VAT plus shipping costs
DDM practical guide to ultrasonic flow meters for small quantities
Areas of application for ultrasonic flow meters
Ultrasonic flow meters are used across multiple industries for precise flow measurement, including:
- Chemical industry: In the chemical industry, where aggressive media, high pressures, and extreme temperatures are common, ultrasonic flow meters provide an optimal solution. DDM Sensors offers models with robust wetted materials such as PEEK or borosilicate glass and high protection classes that meet these requirements.
- Pharmaceutical industry: The pharmaceutical industry demands strict sterility, validation, and high hygiene standards, which ultrasonic flow meters from DDM effectively support. Products from DDM Sensors offer optimal solutions here. Special models are certified for hygienic applications and ensure safe and reliable flow measurement.
- Food industry: Ultrasonic flow meters for the food industry must comply with the relevant food regulations such as FDA and NSF. DDM offers a range of products that enable the precise measurement of flow rates in food production and processing.
Basic data of the ultrasonic flow meter
| Specifications | Details |
| Flow rates | 0.002 – 20 l/min |
| Sealing materials | Viton, EPDM, Nitrile, Silicone, Kalrez |
| Process connection | 1/4″ Female, 1/2″ BSP PEEK, 3/8″ John Guest, 1/2″ NPT 316 Stainless Steel, 1/2″ BSP 316 Stainless Steel |
| Output signal | Pulse (linearized), analogue (0 to 5 VDC/ 0 to 10VDC / 4 to 20mA) Display & ASCII |
| Material in contact with media | PEEK, stainless steel or borosilicate glass, elastomers |
| Temperature ranges | -10 to 60°C, -10 to 110°C |
| Protection classes | IP54, IP63 |
| Measuring accuracy | Linearity: ±1.0% v.MW, ±0.5% v.MB; Repeatability: ±0.1% (25 to 100% v.MB); ±0.5% (< 25 v.MB) |
| Pipe diameter | ½” pipe, as well as 1/8″ and ¼” hose |
| Service life | several years |
Ultrasonic flow measurement with maximum precision thanks to “time-of-flight” technology
The core of ultrasonic flow measurement is Time-of-Flight technology. It is based on the precise measurement of the transit time of ultrasonic waves that are sent in and against the direction of flow through the measured medium. The transit time difference is directly proportional to the flow velocity.
Advantages of the “Time-of-Flight” technology:
- High measuring accuracy and reproducibility: The precise time measurement in the nanosecond range achieves high measuring accuracy and reproducibility, even under fluctuating flow conditions.
- Resistant to pressure shocks, vibrations, and contaminants: The non-contact measurement makes the sensors insensitive to pressure shocks, vibrations and dirt particles in the medium.
- Independence from medium properties: As the measurement is based on the transit time of the ultrasonic waves, it is independent of the properties of the medium such as viscosity, density and conductivity.
Special features of the Atrato models
- Piezoelectric crystals: High-quality piezoelectric crystals generate precise and symmetrical ultrasonic waves for optimum signal quality.
- Optimized wavelength: The wavelength of the ultrasonic signals is optimally matched to the measuring range in order to minimize interference and reflections.
- High signal-to-noise ratio: Ensures a stable zero point and precise measurements even at minimal flow rates.
- Immunity to Reynolds number variations: Atrato technology remains stable even in turbulent flow conditions.
- Good performance with high viscosity: The Atrato sensors perform well even with high viscosity of the measured medium.
Installation and maintenance – simple and straightforward
Installing and maintaining DDM’s ultrasonic flow meters is straightforward and hassle-free:
- Plug-and-play: Simply insert the sensors into the pipeline, and they are instantly operational.
- Short inlet sections: Thanks to the optimized sensor technology and signal processing, only short inlet distances are required, which simplifies installation and saves space.
- Maintenance-free: As the sensors have no moving parts, they are maintenance-free and have a long service life.
Our service for ultrasonic flow meters
DDM Sensors offers comprehensive services for ultrasonic flow meters:
- Calibration service: Regular calibration of the sensors ensures long-term measurement accuracy. We offer professional calibrations with traceability to national standards.
- Individual ultrasonic flow meters: We develop customized ultrasonic flow meters for special, customer-specific measuring tasks. We support our customers from the initial consultation through to the development of the optimum sensor.
Get Expert Consultation – Find the Ideal Ultrasonic Flow Meter for Your Application!
Our team of experts looks forward to your inquiries and will be happy to provide you with comprehensive and individual advice. We will find the perfect ultrasonic flow meter for your application and support you in optimizing your processes.