1.ATEX -Certificate
2.High temperature:up to 280 centigrade
3.Don't need to shut down the pipe
4.Low flow reate measurement
Port: Shanghai
Minimum Order Quantity: 1 Set/Sets
Supply Ability: 500 Set/Sets per Month
Payment Terms: T/T
Contact SupplierPackaging Detail: Carton as per export standard.
Delivery Detail: Within 7 workdays.
Principle of Measurement
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 Ta certain amount ofT 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.
ltrasonic Doppler Flow meters measure solids-bearing or aerated liquids in metal or plastic pipes. Proprietary circuitry allows this instrument to operate with lower concentrations of suspended solids than any competitive Doppler flow meter--expanding the instrument's range of applications and reliability. Clamp-on transducers permit the instrument to be installed in minutes without interrupting system pressure or flow.
In addition, no pressure head-loss is created; therefore system pump horsepower requirements are reduced. The DMDF1 transmitter has a full keypad designed for simple field setup and application versatility. The four-line, backlit, alphanumeric display shows instantaneous flow rate and totalized flows in a variety of user selectable engineering units
Clamp-on or Insertion Explosion-proof transducers are optional.
High temperature transducer: -40~+280 °C
Approvals:II2G, ExdBT6, LCIE 09 ATEX 3088
Solutions:
For petrochemical plant and oil field, oily wastewater discharge, wastewater, sewage, oil drilling slurry, or all explosion-proof occasion of flow monitoring and measurement.
Technical Parameters:
Accuracy | 0.5%~2.0%F.S. | ||
Flow Velocity Range | 0.05m/s~12m/s | ||
Liquid Types | Liquids containing 100 ppm of reflectors and at least 20% of the reflectors are larger than 100 micron. | ||
Transmitter | |||
Enclosure | NEMA 4X [IP65], cast aluminum 310L×226W×127H (mm) 12.2L×8.9W×5H (inch) | ||
Power Supply | 24VDC±5%, 2.5VA Max | ||
Display | 2 line × 8 characters LCD 8-digit rate or 8-digit total (resettable) | ||
Response Time | User selectable: 0-99 seconds | ||
Outputs | 4-20mA, Totalizer pulse and Relay alarm output | ||
Temperature | -40 to +70°C | ||
Approval | II2G, ExdIIBT6, LCIE 09 ATEX 3088 | ||
Transducer | |||
Measuring Range | 0.05m/s ~12m/s | ||
Type | Clamp-on and Insertion | ||
Liquid Temperature | Standard: -40 to +121°C Optional high temperature: -40 to +250°C (-40 to +150°C for Insertion Type) | ||
Cable Length | Standard Lengths: 20Feet [6m] Optional Lengths: to 990 Feet [300m] | ||
Housing Material | Clamp-On: Aluminum Insertion: Stainless Steel | ||
Protection Class | Clamp-On | IP65 | |
Insertion | Std: IP65 | ||
Opt: IP68, can work under water | |||
Approval | II2G, ExdIIBT6, LCIE 09 ATEX 3088 |