The Doppler ultrasonic flow meter is designed to measure volumetric flow of liquid within closed conduit, the pipe line must be filled full of liquids, there must be a certain amount of air bubbles or suspended solids in liquid.Transducers are clamp-on or hot-tapped probe types, user don’t need to shut down the pipe flow when install the clamp-on transducers. The flow meter operates by transmitting an ultrasonic sound from its transmitting transducer, the sound will be reflected by useful sonic reflectors suspended within the liquid and recorded by the receiving transducer. If the sonic reflectors are moving within the sound transmission path, sound waves will be reflected at a frequency shifted (Doppler frequency) from the transmitted frequency. The shift in frequency will be directly related to the speed of the moving particle or bubble. This shift in frequency is interpreted by the instrument and converted to various user defined measuring units.
There must be some particles large enough to cause longitudinal reflection – particles larger than 100 micron.When install the transducers, the installation location must have enough straight pipe length upstream and downstream. Commonly, the upstream needs 10D and downstream needs 5D straight pipe length, where D is pipe diameter.
Applications:raw sewage / domestic water/waste water/chemical indystry/drainage/sanitary water/dirty liquids/ground water/slurry/mining plants/activated sludge/paper slurry and so on.
Measure : The flow of liquids (Total flow & flow totalizer )
One standard set of product includes:
Handheld case, handheld transmitter, standard transducers, couplant, stainless steel belt, charger, 4-20mA output cable terminals, etc.
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NOTES FOR APPLICATION
When installing transducers, it need enough straight pipe;
When straight pipe is not enough, by setting menu SERVICE, the flowmeter will still get high accuracy, and obtain a more accurate reading. more details, please see 4.3.16 SERVICE mode;
The measured liquid must contain a certain amount of air bubbles or suspended solids. When the liquid contains air bubbles too much or too big, the bubbles occupy a certain volume, and then lead
to larger flowmeter reading. In this case, it needs to recalibrate the flowmeter.
When installing clamp-on transducers, the pipe material should have a good acoustical conductivity;
When the transducer need be installed underground, recommend the insertion type.
For dirty liquids, a certain amount of air bubbles or suspended solids shall be containedExcellent low flow rate measurement ability, low to 0.05m/sA wide range of flow measurement, high flow rate can reach 12m/sHigh-temperature transducer is suitable to liquids of -35℃ ~ 200℃Do not need to shut down the pipe flow when installing the transducersFeatures
Configuration Code
DescriptionFeaturesSpecificaitonsConfiguration CodeUser-friendly configuration4-20mA, OCT outputsAccuracy: 2.0% Calibrated spanRechargeable battery can work up to 14 hoursSpecificaitons
Transmitter:| Measurement principle | Doppler ultrasonic |
| Resolution | 0.25mm/s |
| Repeatability | 0.5% of reading |
| Accuracy | 0.5% -- 2.0% F.S. |
| Response time | 2-60s for optional |
| Flow Velocity Range | 0.05- 12 m/s |
| Liquid Types Supported | Liquids containing 100ppm of reflectors and at least 20% of the reflectors are larger than 100 micron. |
| Power Supply | AC: 85-265V Up to 14 hours with fully charged internal batteries |
| Enclosure type | Handheld |
| Degree of protection | IP65 according to EN60529 |
| Operating temperature | -20℃ to +60℃ |
| Housing material | ABS |
| Measurement Channels | 1 |
| Display | 2 line × 8 characters LCD, 8-digit rate or 8-digit total (resettable) |
| Units | User Configured (English and Metric) |
| Rate | Rate and Velocity Display |
| Totalized | gallons, ft³, barrels, lbs, liters, m³,kg |
| Communication | 4-20mA OCT output |
| keypad | 6pcs buttons |
| Size | Transmitter:237X125X42mm case:410X320X80mm |
| Weight | 0.6kg |
| Transducers Type | Clamp-on |
| Degree of protection | IP65. IP67 or IP68 according to EN60529 |
| Suited Liquid Temperature | Std. Temp.: -35℃~85℃ for short periods up to 120℃ |
| High Temp.: -35℃~200℃ for short periods up to 250℃ | |
| Pipe diameter range | 40-4000 mm |
| Transducer Size | 60(h)*34(w)*32(d)mm |
| Material of transducer | Aluminum for standard temp. sensor,and peek for high temp. sensor |
| Cable Length | Std: 5m |