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Add the D-R 220T Visibility Monitor to your store or catalog  
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Durag Visibility Monitor, D-R 220T

D-R 220T Visibility Monitor

Brand: Durag
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D-R 220T consists of a light emitting and receiving measuring head and an optical reflector. 

The device determines the light transmission along a 10 m measuring path. 

The determined transmission allows calculation of visibility which is indicated by it's extinction coefficient VIS k in units 1/m.

The influence of contamination of optical windows on the measuring results is compensated.
Features
  • Reliable measurement along the tunnel
  • No separate control unit required
  • Simple configuration
  • Corrosion resistant
  • Simple and quick mounting
    • Simple alignment
  • Measuring head and reflector can be exchanged
    • Without tools in a few seconds
    • No tools required
    • No additional alignment required
  • Signal transmission by Analogous and digital signals as well as by RS 485 bidirectional MODBUS RTU
  • Reduced spare requirements
  • Extremely low maintenance.

Specifications

Brand

Ambient Temperature Range

  • -25° to 55° C (-13° to 131° F)

Applications

  • Fire Detection in Road Tunnels
  • To Measure Dust Concentration in Factories
  • To Measure Visibility in Road Tunnels & Factories

Approvals & Certifications

  • EN 61 326-1 (2006), EN 61 010-1 (2001)

Approvals & Certifications

  • 2004/108/EC (EMV Directive)
  • 2006/95/EC (Low Voltage Directive (LVD))
  • Flammability Rating: B1 (UL 94 V0) - D-R 220T M Sensor, D-TB 100T Terminal Box

Cable Length

  • 4.92 ft (1.5 m) - D-TB 100T Terminal Box

Communication

  • Modbus RTU
  • RS-485

Current

  • Signal Transmission: 1 x 4-20 mA, 500 ohms, Isolated

Electrical Rating

  • Status Contacts: 0.5 A at 48 V

Environmental Protection

  • IP65
  • IP66 - D-TB 100T Terminal Box

Indication

  • LED

Interface Connection

  • USB 1.1 Port

Length

  • Measuring Path: 32.8 feet (10 metres)

Materials of Construction

  • 316Ti Stainless Steel, 1.4542 - D-R 220T TUBUS
  • Polycarbonate, Ca RAL 7035 - D-TB 100T Terminal Box

Measuring Range

  • VIS K: 0 to 150 Km⁻¹

Power Supply

  • 90-264 Vac, Approximately 30 VA - D-TB 100T Terminal Box (X1)
  • D-R 220T M Sensor (A1): 24 Vdc ± 10 %, Ca. 1 A

Response Time

  • 2 to 180 seconds

Sensor, Probe Material

  • 316 Titanium Stainless Steel, 1.4571 - D-R 220T M Sensor
  • Polymide, Ca RAL 5017 - D-R 220T M Sensor

Documentation

Data Sheets

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