Accurate, real-time airflow monitoring systems designed for mine ventilation optimization.


Ultrasonic Airflow Monitor


The leader in ultrasonic airflow technology providing highly accurate measurements for velocity, direction and volume of air movement in demanding mining environments.

Use FlowTRAX as part of an air quality management system for ventilation control in underground mines. FlowTRAX gives you access to primary and auxiliary fan airflow as well as drift and tunnel airflow monitoring.


  • Ultrasonic time of flight technology in real-time with continuous monitoring
  • Digital signal processing, Modbus RTU and analog 4-20 mA output
  • Advance detection of false readings and sensor obstructions caused by moving vehicles and personnel
  • Robust design capable of operating under extreme temperature and harsh industrial environments

Dowload Flowtrax

FLOWTRAX LR with long-range sensor
FLOWTRAX IS Flowtrax for coal mines

Download Flowtrax

FLOWTRAX LR with long-range sensor
FLOWTRAX IS Flowtrax for coal mines


Four models
A variety of airflow monitoring possibilities

Drift Sensor

Used for ramps, drifts, travel ways, shafts and raises

Stainless steel/polycarbonate. Pan & tilt sensor mounts. Built-in laser pointer for easy sensor alignment and installation. Built-in sensor status heartbeat LED.

Fan Sensor

Used for surface Intake and exhaust fans

Stainless steel mounting plate designed for specific fan application with a ball and socket sensor assembly for easy alignment and quick installation.

IDM Sensor

Used for Auxiliary Ventilation for Fan and Ducts

Pre-wired cable assembly kit. Modular design to meet various application demands. Ball and socket design for easy alignment and quick installation with square or round ducting.

Long Range Sensor

Used for long range sensor applications, road tunnels, salt mines, room and pillar

Designed to accurately measure airflow over long distance runs, wide tunnels, and large cross-sectional measuring areas.


Our systems are supplied with multiple configuration options for simple installation

Cable set
Stainless steel mounting plate
Stainless steel, polycarbonate or aluminum sensor brackets
Hand held programmer


The Accutron FLOWTRAX airflow monitor is designed to measure airflow velocity and volume in a variety of mining and tunnel applications. This ultrasonic, time-of-flight instrument is designed to measure flow in underground tunnels as well as primary and booster fan flow output.


The basics of the measuring principle of Ultrasonic Flowmeters in a few minutes.


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  • Process

    Measuring Units

  • Airflow

    m/s, ft/min,

  • Volumetric Flow

    m3/s, cfm, kcfm

  • Optional with CLIMATRAX™ probe

    Temperature (°C, °F)
    Pressure (psi, mbar, kpal, in/H20) Humidity (RH%) & 12 more parameters


  • Ranges


  • Measuring Range

    0 to < 40 m/s
    (no practical limit)

  • Accuracy

    2% F/S or ± 0.05 m/s
    (whichever is greater)

  • Face to face Distance

    8 ft min
    60 ft max

  • FAN

  • 0 to < 40 m/s
    (no practical limit)

  • 2% F/S or ± 0.05 m/s
    (whichever is greater)

  • 8ft  min
    30ft  max

  • IDM

  • 0 to < 40 m/s
    (no practical limit)

  • 2% F/S or ± 0.05 m/s
    (whichever is greater)

  • 2 ft min
    8 ft max

  • Long Range

  • 0 to < 40 m/s
    (no practical limit)

  • 2% F/S or ± 0.05 m/s
    (whichever is greater)

  • 20 ft min
    120 ft max

  • Electrical ratings

  • Power In

    24 VDC
    110-240 VAC

  • Power Consumption

    < 100 watts

  • Impedance

    700 Ω Max loop resistance

  • Communication Interface

  • Serial

    Modbus RTU RS485

  • Analog outputs

    (1) 4-20 mA

  • Optional

    Modbus TCP with COMMTRAX™,
    Ethernet IP*

  • Physical

  • Enclosure

    Non-corrosive IP68 NEMA 4X with lock hinges

  • Operating Humidity

    0% to 90%RH

  • Operating Temperature

    -40°C to 70°C


For specifications please download brochure or view desktop version

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