Campbell Scientific IRS21 Road Weather User Manual
Page 11
IRS21 Lufft Intelligent Road Surface Sensor
FIGURE 3-4. View of fast steel which is placed under the sensor
prior to epoxy application to provide a base for the sensor.
Fast Steel
1” ball
The fast steel is used to control the depth that the sensor fits into the sensor
hole, and the limiting fixtures on the sensor make the sensor even with the road
surface.
7
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