LRS Vehicle Detector Single Saw Cut Loop Replacement System
The LRS Vehicle Detector is a loop replacement system designed for reliable vehicle presence detection without traditional inductive loops. Using advanced three-axis magnetoresistive sensing, it detects changes in the Earth’s magnetic field caused by vehicles. Its compact, loop-less design reduces installation time and cost while supporting above-ground or below-ground mounting. The Detect-On-Stop feature minimizes false triggers by activating only when vehicles come to a complete stop, making it ideal for tight traffic areas and access control points.
- Three-axis magnetoresistive sensing for accurate vehicle presence detection
- Single saw cut installation reduces labor and pavement damage
- Detect-On-Stop feature ignores cross traffic in tight spaces
- ULTRAMETER display simplifies sensitivity and setup adjustments
- Supports pulse or continuous presence output modes
Utilizes advanced 3-axis magnetoresistive technology for precise vehicle detection through changes in the Earth’s magnetic field.
Allows independent selection of X, Y, and Z axes for customizable and optimized detection in different environments.
DETECT-ON-STOP™ (DOS®) feature enables detection only when a vehicle has come to a complete stop, eliminating false triggers from cross traffic.
Offers single saw cut installation for reduced labor and cost compared to traditional inductive loop systems.
Features ULTRAMETER™ sensitivity display for quick and accurate setup with minimized crosstalk interference.
Compact, loop-less design allows for both above-ground and below-ground installation flexibility.
Includes a logic interface option to extend detection zone or enable A-B directional detection.
Equipped with non-volatile memory that stores ambient background and configuration settings for consistent performance.
Supports both relay and NPN (open collector) output formats for integration with various control systems.
Environmental ratings of IP30 for the controller and IP69K for the sensor ensure robust performance in harsh outdoor conditions.
Offers a wide operating temperature range from -40°C to 82°C, suitable for diverse climates.
Controller and sensor are protected against reverse polarity and fuse failures to enhance operational safety.
Optional remote control module provides convenient programming and additional relay contact outputs.
Sensor is available in flat pack or direct burial versions with 50 ft or 100 ft leads to suit different installation needs.
Enables cost-effective and energy-efficient vehicle detection with a low current draw and minimal maintenance requirements.
| MODEL NAME | LRS Vehicle Detector - Loop Replacement System |
| SENSOR TYPE | 3-axis magnetoresistive |
| INSTALLATION | Single saw cut, above or below ground |
| SENSING AXES | X, Y, Z independently selectable |
| FEATURE - DETECT-ON-STOP | Yes, detection only when vehicle stops |
| FEATURE - ULTRAMETER | Displays optimum sensitivity/crosstalk |
| LOGIC INTERFACE | Optional, for extended detection |
| POWER SUPPLY - CONTROLLER | 12-30 VDC and 24 VAC |
| CURRENT DRAW - CONTROLLER | 40 mA max |
| OUTPUT - CONTROLLER | SPDT relay / NPN open collector |
| OUTPUT RATING - CONTROLLER | Relay: 1A @ 24VDC/120VAC; NPN: 50 mA |
| HOUSING - CONTROLLER | ABS, IP30 rated |
| DIMENSIONS - CONTROLLER | 76 x 22 x 70 mm (3.0 x 0.9 x 2.75 in) |
| WEIGHT - CONTROLLER | 68g (0.15 lbs) |
| SENSOR OUTPUT | NPN (open collector) |
| SENSOR RATING | 50 mA |
| SENSOR CONNECTION | 5 conductor direct burial |
| SENSOR HOUSING | DB: PVC; FP: Polyamide |
| SENSOR RATING | IP69K |
| SENSOR POWER | 12-30 VDC |
| SENSOR CURRENT | 10 mA max |
| DIMENSIONS - SENSOR | DB: 102 x 27 mm; FP: 86 x 21 x 8 mm |
| WEIGHT - SENSOR | DB: 43g; FP: 23g |
| SENSITIVITY | 10 levels: 0-9 |
| AXIS SENSITIVITY | 512 counts/gauss (typical) |
| ENVIRONMENTAL TRACKING | Automatic compensation |
| MAGNETIC FIELD NULLING | Averages local signature in any orientation |
| DETECTION RANGE | 1.5m (5ft) |
| PULSE / PRESENCE MODE | Selectable output mode |
| DETECT-ON-STOP TIME | 1-2s typical |
| OPERATING TEMPERATURE | -40°C to 82°C (-40°F to 180°F) |
| SUPPLY PROTECTION | Reverse polarity and fuse protected |
| LOGIC INTERFACE INDICATORS | Power: Green LED, Detect: 2x Red LEDs |
| LOGIC INTERFACE OUTPUTS | Relay 1: SPDT, Relay 2: SPST |
| LOGIC INTERFACE RATING | 1A @ 24 VDC/120 VAC |
| LOGIC INTERFACE ENVIRONMENT | -40°C to 82°C, 0-95% RH |
| LOGIC INTERFACE HOUSING | ABS, IP30 |
| LOGIC INTERFACE POWER | 12-30 VDC and 24 VAC |
| LOGIC INTERFACE CURRENT | 1 sensor: 22/35mA; 2 sensors: 33/60mA |
| LOGIC INTERFACE DIMENSIONS | 73 x 38 x 78 mm (2.9 x 1.2 x 3.1 in) |
| LOGIC INTERFACE WEIGHT | 113g (0.25 lbs) |
| CONNECTOR TYPE | 11 pin male connector (JEDEC B11-88) |
| AVAILABLE MODELS | LRS-FP-50-K, LRS-FP-100-K, LRS-DB-50-K, LRS-DB-100-K, LRS-C1, LRS-LC |
LRS Vehicle Detector from Alfa Iris offers advanced 3-axis magnetoresistive sensing to replace traditional loop detectors with a single saw cut installation. This compact system provides accurate vehicle detection both above and below ground and features the innovative DETECT-ON-STOP™ technology to ignore cross traffic in confined areas.
Efficient, Reliable, and Easy to Install
The LRS system reduces installation time and cost with its loop-less design. The system’s ULTRAMETER™ sensitivity display ensures quick setup and optimal performance. Built for accuracy, the LRS captures vehicle presence through independent X, Y, and Z axis measurements and stores ambient settings in non-volatile memory.
- Single cut installation above or below ground
- 3-axis magnetoresistive sensing (X, Y, Z)
- DETECT-ON-STOP™ feature for selective detection
- ULTRAMETER™ display for easy sensitivity adjustment
- Logic Interface for extended detection and directional sensing
Versatile Applications and Seamless Integration
The LRS system is ideal for vehicle detection in parking systems, access gates, and tight traffic environments. Available in multiple sensor configurations, it integrates easily with existing control setups using SPDT/NPN outputs. Its rugged sensors are built for both direct burial and flat pack installation, ensuring durability in demanding environments.
- Vehicle detection in gated communities and parking facilities
- Entrance monitoring for commercial or industrial zones
- Cross-traffic filtering in confined or high-traffic areas
Professionals looking for a modern alternative to inductive loops will benefit from the LRS Vehicle Detector's simplified setup, robust performance, and adaptable installation options — all backed by Alfa Iris.
Technical Specifications
- Sensing Technology: 3-axis magnetoresistive
- Sensitivity: 10 levels (0–9)
- Detection Range: Up to 5 ft (1.5 m)
- Outputs: SPDT relay / NPN (open collector)
- Power Supply: 12–30 VDC or 24 VAC
- Sensor Types: Flat Pack (FP), Direct Burial (DB)
- Environmental Ratings: IP30 (controller), IP69K (sensor)
- Operating Temperature: -40°F to 180°F (-40°C to 82°C)
- Special Features: DETECT-ON-STOP™, ULTRAMETER™, Logic Interface Option
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