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.