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Durag D-FL 220T ultrasonic flow velocity monitor for tunnels

Categories: Flow & Velocity,
Brand:

The D-FL 220T continuously measures flow velocity and flow direction in tunnels. Its ultrasonic sensors provide reliable measurement across the tunnel profile for tunnel ventilation control systems.

Two identical sensors alternately transmit and receive ultrasonic pulses. The system evaluates the transition times dependent on direction and calculates flow speed.

Key Benefits

  • Extremely low maintenance
  • Reliable measurement across the tunnel profile
  • Stand-alone system, no control unit required
  • Simple configuration
  • Corrosion resistant against aggressive tunnel atmosphere
  • Withstands lavation process in tunnels
  • Sensors can be replaced quickly, no tools, no re-alignment required
  • Signal transmission
    – per 4-20mA analog signal and 2 relays
    – per RS 485 bus via MODBUS RTU protocol
  • Minimal spare requirements.

Applications

Slow measurement:

  • Road tunnels
  • Railway tunnels

 Signals for ventilation control system

  • Monitors air flow speed
  • Enables control of flow speed in case of fire

Industries

Tunnels, Roads & Transport

SPECIFICATIONS

Application
Measurements Flow speed

Flow rate

Temperature

Measuring path 1.2 – 25 m
Orientation of measuring path 30 – 60°C to tunnel axis, typically 45°
Response time > 1s … 180s, programmable
Resolution 0,1 m/s,
accuracy depends on: installation, path length, flow profile,
typ. < +- 0,2m/s bei 3m/s
orientation of measuring path 30 – 60°C to tunnel axis, typically 45°
Sample Gas Air
Flow velocity -20 .. 20 / -10 .. 10 / 0 .. 10 / 0 .. 20 m/s
Sample gas moisture 0 – 100% relative humidity
Ambient temperature 25 to 55 °C
Standards conformity EN 61 326-1 (2006)
EN 61 010-1 (2001)
RABT 2006
ASTRA guideline ventilation of road tunnels – 2008, V2.01
RVS 09.02.22 2007

Physical

MEASURING HEAD
Dimensions 270 x 130 x 95 mm
Weight 2.2 kg
Material 1.4571/316Ti, polyamide, ca. RAL5017
fire class: B1 (UL 94 V0)
MOUNTING BRACKET
Weight ca. 1.5 kg/td>
Fixation 4x bolt, od= 8 to 10mm

Leave Bronwyn Straccione a Message

Bronwyn Straccione

Hi there, I'm Bronwyn. I've been with TES for 13 years and I'm the territory manager for the ACT, Southern NSW and Tasmania. I also look after our Gasmet and CEMS equipment sales. My usual work days are Monday - Wednesday. If there's something I can help you with, please give me a call on 0404 161 353 or send me a message and myself or your local sales support will be in touch shortly!

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