Identify your model
The model number gives the loop perimeter and lead length. PLH-30-50 is a 30 ft perimeter loop (6 x 9 ft) with a 50 ft lead. The 417 support tee holds the loop above rebar in a pour. PLH and PLH-R are different products. For direct burial in gravel or dirt, see the PLH-R rugged loops.
Key specs
| Sizes | 3 x 5 ft to 6 x 44 ft |
|---|---|
| Lead-in | 40 ft (4 ft wide and under) or 50 ft |
| Cable | 0.360 in OD, XLPE, gel filled |
| Splice | Soldered, sealed and tested |
| Use | Hot asphalt overlay or new concrete |
| Detection height | About 2/3 of the shortest side |
Manuals and documents
Installation Manual
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Prefabricated Loops and Loop Installation Practices
View PDF: Prefabricated Loops and Loop Installation Practices (opens in a new tab) -
PLH Preformed Loop Installation Instructions
View PDF: PLH Preformed Loop Installation Instructions (opens in a new tab) -
PLH Installation Instructions, Earlier Edition
View PDF: PLH Installation Instructions, Earlier Edition (opens in a new tab)
Spec Sheet
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PLH Series Spec Sheet
View PDF: PLH Series Spec Sheet (opens in a new tab) -
Preformed Loop Support Tee Spec Sheet
View PDF: Preformed Loop Support Tee Spec Sheet (opens in a new tab)
Troubleshooting
Common questions
No. PLH loops are for new asphalt overlay or new concrete. Use a saw-cut loop in existing pavement.
Use the support tee on 3/8 in rebar every 1 to 2 ft, with the loop at least 2 in above the rebar.
The first number is the loop perimeter in feet and the second is the lead length.
Match the loop to the lane width. A 6 ft wide loop detects up to about 4 ft high.