Which Type Is Right for Your Gate?

Vehicle detection is one of the most important and often overlooked components of a complete gate automation system. Without reliable detection, gates can close on vehicles, fail to trigger on exit, or miss vehicles entirely. Choosing the right detection method depends on your site conditions, pavement type, installation budget, and how the gate is being used.

This guide breaks down the five primary types of vehicle detection systems we carry, how each one works, where each excels, and which products represent each category. Whether you are planning a new installation or troubleshooting an existing system, this breakdown will help you match the right technology to the job.

Wired Exit Devices

Often called pucks, probes, or exit wands, wired exit devices are one of the most widely used and cost-effective methods for triggering a gate to open from the exit side. They consist of a buried probe or puck sensor that detects the metal mass of a vehicle as it drives by, sending a signal to the gate operator to open. The sensor connects to the gate operator via a direct wire lead, which is routed through conduit or buried alongside the driveway.

Wired exit devices are reliable, simple to install, and compatible with virtually every gate operator on the market. They do not require cuts in the pavement, making them a practical choice for sites where concrete or asphalt cutting is not ideal. Installation is straightforward enough for DIY homeowners, handymen, and property maintenance departments to handle without a professional installer.

Most puck and probe sensors cast a detection radius of approximately 10 feet, meaning if the sensor is placed at the edge of the driveway, it will cover roughly 5 feet into the lane. Centering the sensor in the driveway maximizes coverage.

Best suited for: Residential driveways, single-lane exits, retrofit installations where cutting pavement is not desired.

Featured Products

• Cartell CP4 Exit Loop Sensor: A compact in-ground or post-mounted magnetic puck sensor that detects vehicle presence through the metal mass of the vehicle. Available with 50 ft, 100 ft, and 200 ft cable wire options to accommodate varying distances from probe to operator.

• EMX VMD202 Vehicle Motion Sensor: A direct-burial sensor available in 50 ft and 100 ft lead configurations. The VMD202 detects ferrous metal mass and is engineered for high-sensitivity gate exit applications.

• EMX CarSense 303 Direct-Burial Probe: The CarSense 303 uses advanced 3-axis magnetoresistive sensing to detect vehicle presence with high precision while filtering out pedestrian movement and environmental interference. The probe installs vertically in a borehole at the center of the driveway, sealed in epoxy.

Wireless Exit Devices

Wireless vehicle detection systems deliver the same detection function as wired probes, with one major advantage: because the sensor can be placed in the center of the driveway without needing to run a wire back to the operator, the effective detection area is much larger. Most importantly, these systems eliminate the need for a physical wire run between the sensor and the gate operator entirely. Instead, the buried or surface-mounted sensor communicates with a receiver mounted at the operator wirelessly. Transmission range varies by model, with most commercial-grade systems covering 50 to 200 meters. These devices are the go-to solution for long driveways, driveways with obstacles, and any site where running wire is impractical or cost-prohibitive.

Best suited for: Long or curved driveways, sites where trenching is not feasible, retrofit installs on existing paved surfaces, DIY installs, HOA management, and property managers.

Featured Products

• AES E-Loop Mini Wireless Vehicle Detection System: A compact wireless system featuring a surface-mounted sensor puck and a wireless transceiver. Available in 50-meter range. The E-Loop Mini is the entry-level option for residential properties needing wireless detection without deep installation work.

• AES E-Loop Surface Mounted Wireless Detection System: A step up from the Mini, the surface-mounted E-Loop is available in 50, 100, and 200-meter transmission ranges, making it suitable for longer driveways and properties with more separation between the detection zone and the operator.

• AES E-Loop In-Ground Wireless Vehicle Detection System: The in-ground version of the AES E-Loop buries the sensor puck below the surface for a cleaner, more durable installation. Also available in 50, 100, and 200-meter ranges. Ideal for permanent installations where surface-mounted hardware is not desirable.

In-Ground Inductive Loops

Inductive loop detection is the most widely deployed vehicle detection technology in access control and traffic management. A continuous wire is embedded in the pavement, looping around and connected to a loop detector module inside the gate operator. When a vehicle drives over the loop area, its metal mass causes a measurable change in the loop's inductance, triggering the detector to send a hold-open signal to the operator.

In-ground loops are highly reliable, capable of detecting virtually any wheeled vehicle, and are not affected by weather, ambient light, or radio interference. The primary trade-off is installation: loop wire must be embedded in the pavement by cutting a slit-channel in the existing asphalt or concrete (sawcut method), then sealing it.

Best suited for: High-traffic commercial and industrial sites, parking facilities, anywhere long-term reliability and compatibility with existing loop detector infrastructure is the priority.

Featured Products

• Loop Wire: Elite XLPE Loop Wire is available in 500 ft and 1000 ft reels. XLPE-insulated wire is recommended for buried loop applications due to its resistance to moisture, temperature extremes, and abrasion over long installation lifespans.

• Loop Testers: The Elite Loop Tester and BD Loops E-Z Detector Checker allow technicians to verify loop wire integrity and inductance values during installation and troubleshooting, confirming a healthy loop before connecting to the detector.

Sawcut Loops and Preformed Loops

Sawcut loop installation is the standard method for adding inductive loops to existing paved surfaces. A concrete or asphalt saw is used to cut a slit channel in the pavement, typically 3/16 inches wide, in the shape of a square or rectangle (though any shape is possible, which is why custom sizing is an option). A single loop wire is then pressed into the slit channel and routed to the operator's loop detection system or loop detector. The slit channel is then sealed with loop sealant to protect the wire from moisture and movement.

Preformed sawcut loops are a higher-quality alternative to hand-wound loop wire alone. They come pre-wound and sealed from the factory in a wide range of standard dimensions, are faster to install, and last longer in the field.

Preformed direct burial loops take a different approach. Rather than being placed in a sawcut slot, these loops are buried directly beneath the surface, making them ideal for new construction (placed on top of rebar before concrete is poured), under gravel driveways, or under asphalt before repaving. The BD Loop Prefabricated Direct Burial Loop is built from solid 16 AWG copper wire with a rugged outer jacket and is rated for installation in asphalt, concrete, gravel roads, and under pavers. Loops should be buried 6 to 8 inches below the surface for optimal performance and installed above rebar to maintain sensitivity.

Best suited for: Existing asphalt or concrete driveways, high-volume installations where a consistent loop geometry is needed, new construction where loops are poured into fresh pavement, and gravel or unpaved surfaces where a preformed direct burial loop can be placed without cutting.

Featured Products

• BD Loops Prefabricated Direct Burial Loop: Pre-wound, factory-sealed loops built from solid 16 AWG copper wire with a rugged outer jacket. Available in multiple sizes and lead lengths. Rated for direct burial in asphalt, concrete, gravel, and under pavers. Custom sizes available.

• BD Loops Prefabricated Saw-Cut Loop: The industry-leading preformed sawcut loop, engineered for 3/16-inch slot installations in asphalt or concrete. Features an integrated backer rod, no wire twisting required, and a durable polyethylene jacket. Available in multiple standard dimensions.

• EMX Preformed Loop: A ready-to-use preformed loop with built-in lightning protection and stranded wire construction in rugged TPE tubing. Available in a wide range of sizes from 2x6 ft to 8x12 ft with 50 ft or 100 ft lead-in wire. Compatible with most loop detectors and gate operators.

• Loop Sealant: After wire is installed in the channel, sealant is applied to protect the wire from water infiltration, freeze-thaw cycles, and pavement movement. Available in black and grey formulas.

Loop Detectors

A loop detector is the brain behind every inductive loop installation. Once loop wire or a preformed loop is buried in the pavement, it needs a detector to send current and monitor the inductance level. When a change in the electromagnetic filed is detected (as when a car passes by) it sends a trigger signal to the gate operator. The loop detector is the component that interprets the change in the electromagnetic field and decides when to open, hold open, or release the gate.

There are two main types of loop detectors: plug-in and standalone. Plug-in detectors are proprietary to specific gate operator brands and plug directly into the loop rack inside the operator's control board, making installation clean and simple. Standalone or shelf-mount detectors are universal and work with any gate operator or access control panel, connected via a wiring harness. Standalone detectors offer more flexibility for multi-channel setups, custom installations, and situations where a plug-in option is not available.

Key features to look for include adjustable sensitivity, frequency tuning to prevent cross-talk when multiple loops are installed near each other, fail-safe vs. fail-secure output modes, and LED indicators for quick diagnostics in the field.

Best suited for: Any installation using inductive loop wire or preformed loops, gate operators without a built-in loop detection circuit, multi-channel detection setups, and parking or traffic control applications requiring precise vehicle sensing logic.

Featured Products

• EMX LP D-TEK Low-Power Loop Detector: Designed for solar-powered and low-current installations where minimizing power draw is a priority without sacrificing detection reliability.

• Reno BX-4 Loop Detector: A single-channel 12 to 24V standalone loop detector from Reno A&E, a brand with a long track record in traffic and parking detection. Well suited for standard gate exit and entry loop applications.

• LiftMaster LOOPDETLM: LiftMaster's purpose-built plug-in loop detector for LiftMaster gate operators and compatible LiftMaster systems. Direct plug-in installation with no additional wiring required.

• Allomatic PRIME VD-1: A plug-in loop detector designed for Allomatic gate operators, compatible with the LPR-2 loop rack. A dependable option for customers running Allomatic systems.

Microwave Motion Sensors

Microwave motion sensors detect vehicle presence by emitting a microwave signal and measuring changes in the reflected signal caused by a moving or stationary vehicle. Unlike inductive loops which require in-ground installation, microwave sensors mount above ground on a post or wall, making them a completely non-invasive detection option. They do not require any pavement modification and can be repositioned or reused if site conditions change.

Microwave sensors are particularly well suited for sites where pavement cutting is not possible, for temporary installations, or as a supplement to loop-based systems. Some models also double as safety sensors, detecting vehicles or pedestrians in the gate's path to prevent closure on an obstruction.

Best suited for: Sites where trenching is not feasible, retrofit installs on existing paved surfaces, DIY installs, HOA management, and property managers.

Featured Products

• Optex OVS-02GT Virtual Loop Vehicle Detection Sensor: The OVS-02GT creates a virtual detection zone using optical sensors, replicating the function of an in-ground loop without any pavement work. It mounts above ground and projects a defined detection area, making it one of the most practical and popular alternatives to loop installation in locations where cutting is not viable.

• BEA 10FALCON Microwave Motion Sensor: A high-performance above-ground microwave sensor from BEA designed specifically for gate and barrier applications. The 10FALCON mounts on a post or wall near the gate and detects vehicles approaching or present in the detection zone, triggering the gate operator without any ground penetration required.

• BEA LZR-H100 Laser Scanner: A laser-based detection system that uses time-of-flight scanning to detect vehicles with extremely high precision. The LZR-H100 is suited for demanding gate and barrier applications where accuracy, adjustable detection zones, and reliable performance in varied lighting conditions are required.

Shop Vehicle Detection Systems

Elitegates.net carries the full range of vehicle detection hardware across all five categories, including loop wire, preformed loops, plug-in detectors, wired and wireless exit devices, and above-ground microwave and laser sensors. We stock products from trusted brands including EMX, BEA, AES, Optex, Cartell, BD Loops, Reno, DoorKing, Allomatic, and more.

If you need help selecting the right detection system for your site, our team is available Monday through Friday, 8AM to 4PM PST at (800) 555-6017. Browse the complete vehicle detection collection at elitegates.net/collections/vehicle-detection-systems.