Derex, Inc.

Industrial Data Collection
Analysis and Control

Temperature • Humidity • Flow Rate

  • Energy Production
  • Building Automation
  • Farming
  • Food Processing
  • Plant Automation
  • Irrigation
DXN Hybrid Flow Meter

The DXN Ultrasonic Hybrid Portable Flow Meter

The DXN can measure the flow of pure liquids as well as liquids with entrained solids or aeration. The transmitter will switch between transit time and Doppler measurements on the fly based on the condition of the media inside the pipe.

At Derex, Inc. our entire rental fleet consists of DXN flowmeters. Our rental units experience a wide variety of applications and conditions and the DXN has proven itself to be reliable, rugged, accurate and maintenance-free.

This unit can measure: Flow Rate, Temperature.

TFXB: Transit Time Ultrasonic Flow Meter

Dynasonics TFX Ultra Transit Time Flow Energy Meter
Dynasonics Ultralink Software
Dynasonics DXN Portable Hybrid Transit Time Doppler Ultrasonic Flow Meter
Wall mountable, Integral or Remote Transducers, Optional RTD Thermal Sensors
  • Large digital display
  • Bi-directional measurement
  • Modbus RTU and BACnet® MS/TP over RS485
  • Rugged, aluminum enclosure
  • Certified for hazardous area installation
  • 4-20mA Output
  • USB Programming Port
  • 0-1,000 Hz Rate Pulse and Dual Alarm Outputs
  • Pipe sizes 1/2" to 100"
  • Dynasonics DXN Portable Hybrid Transit Time Doppler Ultrasonic Flow Meter
    Derex, Inc.

    DEREX has over 50 years experience
    working with process equipment related to piping systems.

    We rent and furnish Ultrasonic Flow Meters for thousands of flow applications.
    We have furnished equipment for many process applications including:
    • Pressure Relief Valves
    • Rupture Pin Valves
    • Heating Cable /Tape /Blankets
    • Oil Filters
    • Control Valves
    • Igniters
    • Camera's
    Dynasonics DXN Portable Hybrid Transit Time Doppler Ultrasonic Flow MeterDEREX services the process industries including:
    • Petroleum
    • Chemical
    • Water/Wastewater
    • Pulp/Paper
    • Power
    • Food

    How Ultrasonic Flow Meters Work:

    An ultrasonic flow meter is a type of flow meter that measures the velocity of a liquid or gas (fluid) by using the principle of ultrasound. Using ultrasonic transducers, the flow meter can measure the average velocity along the path of an emitted beam of ultrasound, by averaging the difference in measured transit time between the pulses of ultrasound propagating into and against the direction of the flow. Ultrasonic flow meters are affected by the temperature, density and viscosity of the flowing medium. They are inexpensive to use and maintain because they do not use moving parts, unlike mechanical flow meters.
    Ultrasonic flow meters measure the difference of the transit time of ultrasonic pulses propagating in and against flow direction. This time difference is a measure for the average velocity of the fluid along the path of the ultrasonic beam. By using the absolute transit times both the averaged fluid velocity and the speed of sound can be calculated.
    ©2012 Derex, Inc. PO Box 2983, San Rafael, Ca. 94912, USA Phone: (415) 454-3729, Fax (415) 329-2420 Email: