Product Overview
The BD-SC-40-100 is a BD Loops preformed saw-cut inductance loop used for exit loop vehicle detection in existing asphalt or concrete driveways. This model uses a 40 ft perimeter loop layout (6 ft x 14 ft) with a 100 ft lead-in, giving the installer a ready-made loop assembly instead of hand-forming and splicing loop wire in the field. Once installed in the pavement groove and connected to a compatible loop detector, the loop becomes the sensing field that allows the detector to recognize a vehicle over the loop area.
For gate and access-control work, correct loop selection matters. The loop size controls the detection area, the lead-in length affects the run back to the operator cabinet or detector enclosure, and the detector input determines how the signal is used by the gate controller. Exit loops are commonly placed far enough inside the property to open the gate automatically for vehicles leaving the site. A loop that is too small, too far from the vehicle path, routed incorrectly, or installed with the wrong detector settings can cause short detection range, missed vehicles, false calls, or nuisance reverse signals.
BD Loops saw-cut loops are built for installations where the concrete or asphalt surface is already in place. The installer cuts a narrow groove, places the preformed loop and lead-in into the slot, and seals the groove with proper loop sealant. This style is different from a direct burial loop used before a concrete pour or under new pavement. The saw-cut loop keeps the lead-in and loop assembly protected in the pavement cut while helping the technician maintain a clean, repeatable detection pattern.
Compatible With
This BD-SC-40-100 loop may be used with compatible inductive loop detectors and gate operator control systems that support a standard two-wire vehicle detection loop input. Compatibility is based on the loop detector, input type, pavement layout, lead-in distance, and the function assigned at the controller, not just the gate operator brand.
- Automatic driveway gate systems using an inductive loop detector
- Commercial slide, swing, vertical pivot, and barrier gate operators with a loop-detector input
- Parking control systems, access-control lanes, and gated entry/exit lanes
- Loop detector families from EDI, Reno A&E, EMX, Diablo Controls, BD Loops, Nortech, Miller Edge, Linear/OSCO, DoorKing, LiftMaster, HySecurity, All-O-Matic, Viking, FAAC, CAME, BFT, Nice/Apollo, and other systems that accept a standard two-wire inductive loop input
- Replacement of a failed or damaged saw-cut loop where the loop size and lead-in length match the original layout
Use this model where the pavement layout calls for an exit/free-exit detection loop with this loop size and lead-in length. It is not a radio receiver, keypad, timer, or motion sensor by itself; the loop must be connected to a loop detector that is wired into the operator controls. Always verify the operator wiring diagram, loop detector instructions, safety-device requirements, and the original loop layout before replacing an existing loop.
Features & Specifications
| Manufacturer | BD Loops |
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| Product Type | Preformed saw-cut inductance loop |
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| Part Number | BD-SC-40-100 |
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| Loop Size | 6 ft x 14 ft |
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| Loop Perimeter | 40 ft perimeter |
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| Lead-In Length | 100 ft |
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| Application | Exit loop / automatic open vehicle detection |
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| Installation Type | Saw-cut groove in existing asphalt or concrete |
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| Wire / Construction | 16 AWG loop wire with protective jacket and preformed loop layout |
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| Detector Requirement | Requires a compatible inductive loop detector |
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| Notes | Saw-cut loop only; do not confuse with direct burial loop versions |
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Also Known As / Related Part Numbers
Common search and ordering references for this loop include:
- BD-SC-40-100
- SC-40-100
- SC 40 100
- BDSC40100
- BD Loops SC-40-100
- SC 40-100
Related BD Loops saw-cut part numbers may share the same loop family but differ by loop perimeter, layout, or lead-in length. For example, SC 32, SC 36, SC 40, SC 44, and SC 52 references indicate different loop sizes, while 20, 50, and 100 usually indicate lead-in length. Do not substitute a nearby part number unless the site layout and detector location support the size and lead length.
Technician Note
When replacing a loop, check whether the original failure was caused by a broken conductor, water intrusion, pavement movement, bad loop sealant, damaged lead-in, or a failing loop detector. A new loop will not correct a defective detector module, incorrect sensitivity setting, damaged conduit run, or wiring issue between the detector and the operator.
Before Ordering
- Confirm the loop function: exit, reverse, safety, presence, or other detector input.
- Measure the pavement loop size and compare it with 6 ft x 14 ft / 40 ft perimeter.
- Confirm the lead-in route and make sure a 100 ft lead is suitable for the detector location.
- Verify that the loop detector accepts the loop style and that the detector output matches the gate operator input.
- Check the pavement condition before cutting; cracked or moving asphalt/concrete can shorten loop life.
- Use the correct groove width, depth, sealant, and installation tools for a saw-cut preformed loop.
Professional Advisory
Vehicle loops are part of the access-control and safety logic of many gate systems. Do not bypass required photo eyes, edges, monitored safety devices, or operator safety inputs to compensate for a bad loop. If the gate moves unexpectedly, reverses randomly, does not detect vehicles, or has damaged high-voltage wiring in the operator cabinet, have the system inspected by a qualified gate technician.
Product Questions & Answers
What is the BD-SC-40-100 used for?
The BD-SC-40-100 is used as a preformed saw-cut exit loop for vehicle detection. It connects to a compatible loop detector, which then sends a signal to the gate operator, barrier gate, or access-control equipment.
What size is the BD-SC-40-100 loop?
This loop is a 40 ft perimeter saw-cut loop configured as 6 ft x 14 ft with a 100 ft lead-in. The pavement layout should match the intended detection area and lead-in path back to the detector cabinet.
Can this BD Loops saw-cut loop connect to any loop detector?
It may be used with most inductive loop detectors that accept a standard two-wire loop input, as long as the detector, loop size, lead-in length, and wiring method are suitable for the installation.
Is this the same as a direct burial loop?
No. This is a saw-cut loop for existing concrete or asphalt where a groove is cut, the loop is inserted, and the groove is sealed. Direct burial loops are built differently for installation under new pavement or in soil.
What should be checked before ordering BD-SC-40-100?
Check the loop function, loop dimensions, lead-in length, detector cabinet location, pavement type, saw-cut path, and whether the site requires an exit loop or another loop size. Similar BD Loops part numbers may differ only by size or lead length.
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