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OTT HydroMet - Model LUFFT IRS31Pro -Intelligent Passive Road Sensor
The passive road sensor IRS31Pro convinces by its two-part housing design and accurate detection of road surface temperature, water film height, freezing temperature, ice percentage, and many more. The passive road sensor IRS31Pro is flush-mounted in the road. The two-part housing design allows the combined sensor/electronics unit to be removed for maintenance or calibration at any time. The following variables are recorded: Road surface temperature, water film height up to 4 mm, freezing temperature for different de-icing materials (NaCl, MgCl, CaCl), road condition (dry/damp/wet/ice or snow, damp with salt, wet with salt), friction (Grip), ice percentage. Optional: 2 additional depth temperatures, e.g. at 5 cm and 30 cm. The measurement data is available for further processing in the form of the LUFFT UMB standard protocol.
- Parameters measured: Road surface temperature, water film height up to 4mm, freezing temperature for different de-icing materials (NaCl, MgCl, CaCl), road condition (dry/damp/wet/ice or snow/moist with salt/wet with salt), friction, ice Percentage, 2 additional depth sensors
- Measurement technology: Conductivity measurement (ice percentage), radar measurement (water film), NTC (road surface temp.)
- Product highlights: Two part housing design allows easy maintenance/re-calibration, low energy consumption allows solar operation, radar principle to measure water film
- Interfaces: RS485, SDI-12, analogue outputs
- Freezing temperature output already from pre-set dry-damp threshold (e.g. 10µm according to new TLS specification).
- Replaceable sensor electronics (for easy calibration or maintenance)
- Polling via RS485 interface
- Low energy consumption (solar operation)
- Radar principle to measure water film
- Analogue outputs in combination with a converter (DACON - 8160.UDAC)
- For winter maintenance operators as part of road weather stations on roads, motorways, highways (municipalities, federal states and provinces)
- For smart cities
- For airports, installed on runway as important part of the IDS (ice detection system) and water film height detection (aqua-planning risk)
General:
- Dimensions: Ø 120mm, height 50mm
- Detectable road conditions: Dry/moist/wet/moist with salt/wet with salt/ice
- Weight: Approx. 800 g without cable and without external temperature probe
- Storage temperature: -40...70°C (in packaging)
- Rated current: <200mA
- Interface: RS485, Baudrate: 2400 ... 38400 bit/s (Standard: 19200) or SDI-12
- Protection type: IP68
- Power supply: 9...14VDC, nominal 12V
- Connector: Cable 0.5mm²
- Operating temperature: -40...80°C
- Operating rel. humidity: 0...100% RH
- Road dampness: Unit: dry/damp/wet/damp with salt/wet with salt
- Slippery road conditions: Unit: no ice/snow, snow, ice
Road surface temperature & below ground temp.:
- Principle: NTC
- Measuring range: -40 ... 80 °C
- Unit: °C
- Accuracy: ±0.1°C (-20 ... 20°C), else ±0.2°C
- Resolution: 0.1
Freezing point:
- Measuring range: -40 ... 0 °C
- Unit: °C
- Accuracy: ±0.5°C (0 ... -2.5°C), else ±20% of average value (at de-icing agent NaCI)
- Resolution: 0.1
Water film height:
- Principle: Radar
- Measuring range: 0 ... 4 mm
- Unit: mm
- Accuracy: 0.2mm to 3mm: better than +/-30%
- Resolution: 0.01 mm
Friction (Grip) [slippery...dry]:
- Measuring range: 0 ... 1
Ice Percentage:
- Measuring range: 0 ... 100 %
- Unit: %