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D-R 220T Visibility Monitor
Brand: DuragD-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
- 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
Approvals & Certifications
- EN 61 326-1 (2006), EN 61 010-1 (2001)
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
