User's Manual

302UM0017 Rev 01 PD230 Enhanced Detector User Manual Page 23 of 37
recommended feeder length is 100 metres. It should be noted that the loop
sensitivity decreases as the feeder length increases, so ideally the feeder cable
should be kept as short as possible.
The loops are sealed using a “quick-set” black epoxy compound or hot bitumen mastic to blend with
the roadway surface.
300 mm 300 mm
+/- 2 m depending on road width
1 m1 m
Min Distance Apart - 2 m (Road width = 2 m)
- 3 m (Road width = 4 m)
Max Distance Apart – No Limit
Figure 5.1 Adjacent loops connected to different detector modules
4 mm
30 – 50 mm