Industrial Data Collection
Analysis and Control

Temperature • Humidity • Flow Rate

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The DXN Portable Ultrasonic Flow and Energy Meter is a true hybrid instrument, capable of measuring liquid flow with multiple technologies, including: Doppler, transit time and liquid thermal (heat energy) flow. Easy to install by clamping onto the outside of the pipe, the DXN measures flow using non-invasive ultrasonic sensors. Compatible with a pipe wall thickness gauge, inside pipe diameter can be verified to ensure accurate ultrasonic measurements when piping details are unknown or unavailable.

The DXN has a number of advanced features including a touchscreen interface, full-color graphing, wizard-based start-up configuration, USB connectivity, and Modbus TCP/IP connectivity. These features make it easy for technicians to obtain accurate readings while capturing flow surges and high-speed batch operations.

The DXN captures and displays multiple user-defined and application parameters at once and can record the data with an easy-to-use data logging function. The ability to monitor and record several parameters at once allows technicians to verify and troubleshoot permanent flow installations with ease. The compact design fits the meter and accessories into one convenient over-the-shoulder bag for easy portability. Applications include clean, solids-bearingor aerated liquids in closed full pipes 1/2 inch(12 mm) and larger.

OPERATION:

Transit time flow meters measure the time difference between the travel time of an ultrasound wave going with the fluid flow and then against the fluid flow. This time difference is used to calculate the velocity of the fluid traveling in a closed-pipe system. The transducers used in transit time measurements operate alternately as transmitters and receivers. Transit time measurements are bi-directional and are most effective for fluids that have low concentrations of suspended solids.

Doppler flow meters operate by transmitting an ultrasonic wave from a transducer through the pipe wall and into the moving liquid. The sound wave is reflected by suspended particles or bubbles moving with the liquid and ultimately gathered by the receiving transducer. A frequency shift (Doppler effect) will occur that is directly proportional to the speed of the moving particles or bubbles. This shift in frequency is interpreted by the digital signal processor (DSP) and converted to a fluid velocity measurement.

Using its built-in hybrid technology, the DXN will automatically choose which type of flow measurement to read based on signal quality during operation. Regardless of the method used to determine velocity, multiplying the pipe’s cross-sectional area by the fluid velocity produces a volumetric flow rate. The measurement also presumes that the pipe is completely full during the measurement cycle.

When used in conjunction with flow measurement, temperature measurements can yield energy usage readings in the form of heat flow. To find the net heat loss or gain, energy usage is calculated by multiplying the flow rate of the heat transfer fluid by the change of heat content in the fluid after it has done some kind of work. An ultrasonic meter equipped with heat flow capabilities measures the rate and quantity of heat delivered or removed from devices such as heat exchangers. The instrument measures the volumetric flow rate of the heat exchanger liquid, the temperature at the inlet pipe and the temperature at the outlet pipe.

2017 Rental Fleet Purge:

Kits include hardware, cables and cases.

After Fleet Discount: $7050

Retail: $8804

We have 2 units available at this price (each.) Both units come with current annual calibration certificates. These meters have long service lives and are actively supported by the manufacturer. Excess rental meters are retired annually to make room for new models.
These units are in good condition with minor cosmetic blemishes from use.

Included:

• DXN Transmitter
• Small Transit Time transducers
• Standard Transit Time transducers
• Large Transit Time transducers
• Doppler transducers
• Pipe wall tranducer
• USB Drive
• Auxiliary Output Box
• Serial Port Cable
• All Cables
• All Cases

At Derex, Inc. we have rented DXN's out for a wide variety of applications since their initial release in 2011. Our first purchased unit is still in operation.

These units set up easily, read flow accurately in any direction and work on any pipe. Straight pipe lengths are recommended (10 diameters up, 5 diameters down) but not critical for basic operations.

The NEW DXN is simply the best option for your next portable application, with true hybrid transit time and Doppler operation, an expandable 1GB data logger that takes readings over 50 times a second, and the ability to store site-specific parameters using plain English site descriptions. Take control of your toughest applications, add the DXN Portable to your flow measurement toolkit today.