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Durag D-R 220T Visibility Monitor

Categories: Flow & Velocity,
Brand:

DURAG’s D-R 220T Visibility Monitor uses the optical transmission principle to monitor visibility for ventilation control or fire alarm systems in tunnels. It provides reliable measurement parallel to the tunnel axis.

Key Benefits

    • Measurement parallel to tunnel axis, continuous measurement
    • Measurement along a distance of 10m, no spot measurement
    • Corrosion resistant against tunnel atmosphere
    • Determination and correction of the pollution of optical surfaces
    • Measuring head and reflector can be quickly exchanged
      – no tools required
      – no re-alignment required
    • Signal transfer
      – per analog signal and relay outputs
      – per RS485 Modbus RTU
    • Hermetically sealed housing – no gas diffusion to optics or electronics
    • Dust protection tube prevents contamination of the optics
    • Long maintenance intervals
    • Quick and easy startup with or without PC

Applications

Suitable to measure visibility and dust concentration, and for early fire detection in:

  • Road tunnels
  • Factories.

Industries

Tunnels, Roads & Transport

SPECIFICATIONS

Application
Sample gas Air
0 – 95 % rel. humidity (not condensing)
Measuring ranges 0 – 15 (…150) km-1 K extinction coefficient
0 – 97.5 % opacity (as an option)
Output range Any interval of any measured value can be assigned to analog output, for example
extinction coefficient K in km-1
opacity in %
Modbus RTU allows access to the a.m. values
Measuring path Distance measuring head – reflector: 9.5-11m,
Path length 19-22m
Orientation parallel to tunnel axis,
Ambient temperature -20 to +50 °C, dT/t < 10°C/h
Measuring principle Measuring the optical transmission of visible light which passed a measuring path twice
Light source LED White, 530 nm

TECHNICAL DATA

D-R 220T M MEASURING HEAD SENDER/RECEIVER UNIT
measurement outputs 1 x 4-20mA, 400 Ohm, isolated
1 x RS 485 Modbus RTU
status output 2 x relay NO, programmable, max load 48V, 0,5A
interface USB
power supply 24 VDC, +- 10%, 0.4A
Protection rating IP 65
Dimensions ca. 150 x 220 x 140 mm
Weight ca. 2.7 kg
Material polyamide, ca. RAL5017
fire class: B1 (UL 94 V0)
D-R 220T R3 REFLECTOR
Type optical retroreflector, optimized for 9.5 to 11m distance to measuring head
Dimensions ca. 150 x 110 x 140 mm
Weight ca. 1.6 kg
Material polyamide, ca. RAL5017
fire class: B1 (UL 94 V0)
D-R 220T DUST PROTECTION TUBE
Dimensions ca. 280 x 110 x 110 mm
Weight ca. 3 kg
Material 1.4571
D-RV 220T BW BRACKET
Dimensions 160 x 280 x 190 mm
Weight 4 kg
Material 1.4571
Fixture 4x bolt d= 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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