Ultrasonic flow measurement with the method of transit-time differential is today one of the most adaptable flow rate and volume measuring processes. Transit-time flow meters use multiple sensor/transmitter elements upstream and downstream on the outside of a line.
This measuring method is especially suitable for measurement of homogenous and clear liquid, with low to medium range. Note that the transit-time method requires clean liquid applications, as particles and bubbles will alter the pulse, and create noise and a loss of signal.
- All very dynamic liquid processes with dosing times of below 1 second
- Distribution of chemicals, control routines, monitoring storage
- Filling processing machines in food industries
- Cooling systems
- Processing equipment, control and monitoring of formulations
- Valve control on dosing process
- De-ionized water distribution
The ultrasonic flow measurement is based on the phase difference approach. Two sensors, emitters/receivers, opposite from each other, alternatively transmit and receive ultrasonic signals. With liquid static, no flow, both sensors receive the transmitted ultrasonic signals in the same phase.
With flowing liquid, there is a phase shift. It differs when measured in direction of the flow than when measured against it.
This phase difference is directly proportional to the flow rate. The flow rate and the known diameter of the pipe are used to determine the flow rate.
- Non-invasive, continuous measurement of conductive and not conductive liquid
- Chemically resistant to aggressive liquid
(ie. concentrated alkaline or acidic, CIP (Clean In Place), lixiviates, etc.) - Wide measuring range and fittings options
- No movable parts
- Small dimension
- Ease of installation and cleaning
- Remote display unit with flow-meter parameters and integrated functions (output signals, reset of totalizer, dosing function, etc)
- Diameter: DN 7, DN10, DN15, DN20
- Range: 0.09-6 L/min, 0.3-24 L/min, 0.9-60 L/min, 1.2-120 L/min
- Accuracy: ± 2 % of reading and ± 0.3 mm/s
- Pressure limits: 6 bar at 20°C
- Temperature limits: 0 to +60°C
- Body in PFA
- Analogue Output: 0/4-20 mA
- Digital Output: to set as pulses or empty tube alarm, reverse flow, dosage, min. or max. flow-rate
- Without display
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- Diameter: DN5, DN7, DN10, D15
- Range: 0.024 to 3 L/min, 0.09 to 6 L/min, 0.3 to 24 L/min, 0.9 to 60 L/min
- Accuracy: ± 2 % of reading and ± 0.3 mm/s
- Pressure limits: Max. 7 bar at 20°C
- Temperature limits: 0 to +60°C
- Body in HD-PE (High-density Polyethylene)
- Analogue Output: 0/4-20 mA
- Digital Output: to set as pulses (0.1 to 3000 ml/pulse) or empty tube alert, flowing back alarm, dosage, or min./max. flow alarm
- Display: Alphanumeric back lighted LCD
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- Diameter: DN10, DN15, DN20, DN25
- Range: 0.3-21 L/min, 0.9-36 L/min, 3.5-60 L/min, 5.0-240 L/min
- Accuracy: ± 2 % of reading and ± 3 mm/s
- Pressure limits:
16 Bar at 20°C (DN10 & DN15)
10 Bar at 20°C (DN20 & DN25) - Temperature limits: 0 to +80°C
- Body in PSU (Polysulfone)
- Analogue Output: 0/4-20 mA, scalable
- Digital Output: to set as pulses (0.1 to 3000 ml/pulse) or empty tube alert, flowing back alarm, dosage, or min./max. flow alarm
- Display: Alphanumeric back lighted LCD / remote display module (option)
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- Diameter: DN32, DN40, DN50
- Range: 6-300 L/min, 24-500 L/min, 45-900 L/min
- Accuracy: ± 2 % of reading and ± 3 mm/s
- Pressure limits: Max. 7 bar at 20°C
- Temperature limits: 0 to +50°C
- Body in HD-PE (High-density Polyethylene)
- Analogue Output: 0/4-20 mA, scalable – relay / 2 changeover
- Digital Output: to set as pulses (0.1 to 3000 ml/pulse) or empty tube
- Display: Alphanumeric back lighted LCD / remote display module (option)
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