The passive road sensor IRS31Pro-UMB 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 a standard protocol (Lufft UMB protocol).
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
Conductivity measurement (ice percentage), radar measurement (water film), NTC (road surface temp.)
Two part housing design allows easy maintenance/re-calibration, low energy consumption allows solar operation, radar principle to measure water film
Advantages:
- 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)
| 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 | % |
