![Doppler Technology Ultrasonic Meter [ALSONIC-DDPL]](https://cdn2.npcdn.net/images/product/1200x1200-1-0/726890-product4003986.jpeg "Doppler Technology Ultrasonic Meter [ALSONIC-DDPL]")
SmartMeasurement’s Alsonic DDPL Doppler flowmeters employ a pair of clamp-on transducers for non-invasive liquid measurement of solids-bearing or aerated liquids in metal or plastic pipes. Proprietary circuitry allows it to operate with lower concentrations of suspended solids versus competitive Doppler flow meters in the market. Clamp-on transducers allow the instrument to be installed without shutting down the process flow.
Clamp-on transducers allow the instrument to be installed without shutting down the process flow. Two piezoelectric crystal transducers are clamped onto opposite sides of a liquid filled pipe. One transmits an ultrasonic signal through the pipe wall into the moving fluid while the other measures a portion of this signal reflected back by suspended solids,
entrained gases or flow turbulence.
Electronic circuitry compares the transmitted frequency with the received frequency. The difference, or frequency shift, is proportional to fluid velocity, in accordance with principles developed by Christian Johann Doppler. If the liquid is not moving (a zero flow condition) the transmitted and received frequencies are identical.
- Wall mount, Doppler technology
- Liquid must be dirty with some particles
- ½" - 240" (15-6000 mm) line sizes
- -22~+302 °F (-30 ~ +150C)
- 2% - 5% of reading
- Clamp-on outside of pipe; three transducer sizes available
- Analog/digital outputs, data logger
- Wastewater, drilling mud, any portable application with many particles
Features
- Non-fouling transducer is immune to build-ups of grease, paraffin and other coating materials
- Solid-state measurement never requires re-calibration and is virtually maintenance-free
- Limited straight-run requirements
- Industry standard outputs allow direct interface to data loggers and controls systems
- Data logger function; includes date, totalizer, signal condition
- Operates with relatively clean liquids as well as liquids with high concentrations of suspended solids or aeration
- Alphanumeric keypad for field setup with two-line, backlit display; indicates instantaneous and totalized flows
Specifications
| Measuring Principle: | Doppler frequency shift |
| Pipe Sizes: | (Std) 1 ~ 120 inches (25 ~ 3050 mm): (Opt) 0.25 ~ 1 inch (6 ~ 25 mm) |
| Temperature: | (Std) -40° ~ 180°F (-40° ~ 82°C): Opt) -40° ~ 300°F (-40° ~ 150°C) |
| Fluid Velocity: | Clamp on, 1 ~ 20 FPS (0.3 ~ 6.08 MPS); Insertion: 0.5 ~ 20 FPS (0.15 ~ 6.08 MPS) |
| Accuracy: | ±2% Full Scale |
| Repeatability: | ±0.4% of Full Scale |
| Engineering Units: | FPS, GPM, MGD (MPS, LPM, m3/hr) |
| Minimum particulates: | 4 ½ digit |
| Resolution: | 0.4% of Full Scale |
| Response Time: | 5 ~ 50 seconds, user configured, to 90% of value |
| Display: | 2 line x 20 character alphanumeric LCD; (backlit), 6 digit – flow rate, 6 digit – total flow |
| Indicators: | Power, signal strength, diagnostic codes, over-range, read, low battery, charge |
| Protection -Converter: | NEMA 4/IP-65 (IP-67) ABS |
| Transducers: | IP68 (Submersible) |
| Max. Cable Length: | 6m, flexible armored conduit, Up to 100m |
| Power Consumption: | less than 12VA |
| Power Supply: | Wall-mount: 115/230 VAC 50/60 Hz ±10% and 12VDC; Portable: Internal lead acid gel cell battery provides; up to 8 hrs of continuous operation; Hand-Held: Up to 14 hours |
| Outputs: | Wall-mount: 4-20 mA, pulse, RS232, RS485; Portable:4-20 mA, 600 Ω max, isolated. |
| Data logger: | 4.0M bytes data logger up to 200,000 records |
| Approval | CE |
Refer here for more details: https://www.smartmeasurement.com/alsonic-ddpl/
US 14120 
GB 10784 
CA 10000 
AU 9570 
IE 6072 
NZ 4582 
BR 4105 
CN 1459 
