This product is no longer available.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
Overview
The IRS21 is a passive sensor embedded in the monitored road surface, flush with the surface, to provide measurements of actual road conditions. It measures surface temperature, water-film level, freezing temperature for NaCl, and road condition (dry, damp, wet, ice or snow, residual salt, freezing). The IRS21 is a primary component of our road-weather information stations (RWIS). Two IRS21 sensors are typically installed at each measurement site.
An SDM-SIO1 or other RS-485 to RS-232 converter is required for communication with Campbell Scientific data loggers.
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Detailed Description
The IRS21 Intelligent Road Surface Sensor is a primary component of our Road Weather Information Stations (RWIS). This passive sensor is typically embedded in the monitored road surface, flush with the surface, to provide measurements of actual road conditions. Two IRS21 sensors are typically installed at each measurement site.
The IRS21 measures the following parameters:
- Road surface temperature
- Water film level (up to 4 mm)
- Freezing temperature for NaCl (others on request)
- Road condition (dry/damp/wet/ice or snow/residual salt/freezing)
Specifications
| Power Requirements | 9 to 14 Vdc (less than 200 mA) |
| Interface | RS-485 |
| Road Condition Output | dry, damp, wet, snow, freezing wetness, ice |
| Road Temperature Measurement Range | -40º to +70ºC |
| Road Temperature Accuracy |
|
| Road Temperature Resolution | -0.1ºC |
| Freezing Point Range | -20º to 0ºC (-4º to +32ºF) |
| Freezing Point Accuracy | ±0.1ºC |
| Freezing Point Resolution | -0.1ºC |
Compatibility
An SDM-SIO1 or other RS-485 to RS-232 converter is required for communication with Campbell Scientific data loggers.
Documents
Brochures
Manuals
Downloads
IRS21 Luftt Road Surface Sensor Epoxy Calculation (75 KB) 10-10-2006
Spreadsheet for calculating epoxy fill needed for road sensor installationPrivacy Policy Update
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