The IRS21 passive road sensor is built into the road, flush with the surface.

The two-part housing design enables the combined sensor/electronics unit to be exchanged for maintenance or calibration purposes in a matter of minutes.

 

The following measurements are taken:

- Road surface temperature

- Water film level up to 4mm

- Freezing temperature for NACL (others on enquiry)

- Road condition (dry/damp/wet/ice or snow/residual salt/freezing)

 

The sensors can be addressed and therefore networked.  The measurement data is digitally transmitted via RS485-interface for further processing (logger, PLC etc.)