Lufft's IRS21 Intelligent Road Surface Sensor is a passive sensor embedded in the monitored road surface, flush with the surface, to provide measurements of actual road conditions. The IRS21 is a primary component of our Road Weather Information Stations (RWIS). Two IRS21 sensors are typically installed at each measurement site.

Features

In our RWIS stations, the IRS21s are interfaced to a CR1000 or CR10X datalogger via the 18080 Lufft interface and the SDM-SIO4.

The IRS21 is shipped with a 75 ft (25 m) cable attached. Customers who wish to lengthen the cable should take care to ensure that the spliced cable is of the same quality as the original and that the splice itself is impervious to the elements.

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: ±0.2ºC (-10º to 10ºC); ±0.5ºC (-40º to 70ºC)
Road Temperature Resolution: -0.1ºC
Freezing Point Range: -20º to 0ºC (-4º to +32ºF)
Freezing Point Accuracy: ±0.1ºC
Freezing Point Resolution: -0.1ºC

Producing Area:USA