LRS Vehicle Detector Loop Replacement System Single Saw Cut Sensor
The LRS Vehicle Detector is a loop replacement solution using advanced 3 axis magnetoresistive sensing to detect vehicle presence without traditional inductive loops. Designed for above or below ground installation, it reduces cutting and labor while maintaining reliable detection accuracy. The Detect On Stop feature filters moving cross traffic in tight areas, while the Ultrameter display simplifies sensitivity adjustment. Compact housing, wide voltage support, and environmental compensation make it suitable for gates, parking, and access control applications.
- Single saw cut design reduces installation time and surface damage
- Three axis sensing improves accuracy in varied mounting positions
- Detect On Stop ignores cross traffic in confined spaces
- Works above or below ground with loop free installation
- Relay and NPN outputs support flexible system integration
Employs advanced 3-axis magnetoresistive sensing technology for accurate vehicle presence detection by monitoring changes in the Earth's magnetic field.
Features DETECT-ON-STOP™ technology to ignore cross traffic and only detect vehicles when fully stopped, ideal for tight access areas.
Offers three-dimensional detection with independent X, Y, and Z axis selection for increased accuracy and application flexibility.
Includes ULTRAMETER™ sensitivity display for quick and precise setup, eliminating crosstalk interference between detectors.
Compact, loop-less design significantly reduces installation costs compared to traditional inductive loop systems.
Sensor stores ambient background and configuration settings in non-volatile memory to retain settings after power loss.
Equipped with a standalone sensor and optional remote control module for programming and relay output expansion.
Optional Logic Interface enables extended detection range or directional vehicle detection through AB logic functionality.
Supports pulse or constant presence output modes for integration with various gate and access control systems.
Control unit and sensor are reverse polarity and fuse protected, ensuring reliable operation in rugged environments.
Rated for extreme temperatures (-40°F to 180°F) and includes IP30/IP69K-rated enclosures for versatile indoor and outdoor use.
Direct burial and flat pack sensor variants are available with 50 ft or 100 ft lead lengths to suit different installation needs.
Low power consumption with sensor drawing only 10 mA and controller operating at 12-30 VDC or 24 VAC input.
LED indicators on the control unit and logic interface provide visual confirmation of power, detection, and fault status.
Designed for vehicle detection applications where traditional loop detectors are not feasible, offering a non-invasive alternative.
| MODEL NAME | LRS Vehicle Detector - Loop Replacement System |
| INSTALLATION | Above or below ground with single saw cut |
| TECHNOLOGY | 3-axis magnetoresistive sensing |
| FEATURE - DETECT-ON-STOP | Detection only when vehicle comes to a complete stop |
| FEATURE - ULTRAMETER | Displays optimum sensitivity and crosstalk interference |
| FEATURE - LOGIC INTERFACE | Optional for extended detection range or A-B directionality |
| AXIS SELECTION | Select X, Y, Z independently |
| SENSING RANGE | 1.5m (5 ft.) |
| SENSITIVITY LEVELS | 10 levels: 0-9 |
| AXIS SENSITIVITY | 512 counts/gauss (typical) |
| CONTROL UNIT - POWER INDICATOR | Green LED |
| CONTROL UNIT - DETECT INDICATOR | Red LED |
| CONTROL UNIT - OUTPUTS | SPDT relay / NPN open collector |
| CONTROL UNIT - OUTPUT RATINGS | Relay: 1A @ 24VDC or 120VAC; NPN: 50 mA max |
| CONTROL UNIT - CONNECTION | 10 position screw terminal |
| CONTROL UNIT - HOUSING | ABS |
| CONTROL UNIT - RATING | IP30 |
| CONTROL UNIT - POWER SUPPLY | 12-30 VDC and 24 VAC |
| CONTROL UNIT - CURRENT DRAW | 40 mA max |
| CONTROL UNIT - DIMENSIONS | 76mm x 22mm x 70mm |
| CONTROL UNIT - WEIGHT | 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 SUPPLY | 12-30 VDC |
| SENSOR - CURRENT DRAW | 10 mA max |
| SENSOR - DIMENSIONS | DB: 102mm x 27mm; FP: 86mm x 21mm x 8mm |
| SENSOR - WEIGHT | DB: 43g (0.09 lbs.); FP: 23g (0.05 lbs.) |
| DETECTION TYPE | Pulse or constant presence |
| ENVIRONMENTAL TRACKING | Automatic compensation |
| MAGNETIC FIELD NULLING | Averages local field signature in any orientation |
| OPERATING ENVIRONMENT | -40°C to 82°C (-40°F to 180°F) |
| SUPPLY PROTECTION | Reverse polarity and fuse protected |
| LOGIC INTERFACE - POWER INDICATOR | Green LED |
| LOGIC INTERFACE - DETECT INDICATORS | 2x Red LEDs |
| LOGIC INTERFACE - SELECTOR | 10 position rotary switch |
| 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 | One sensor: 22/35mA; Two sensors: 33/60mA |
| LOGIC INTERFACE - DIMENSIONS | 73mm x 38mm x 78mm |
| LOGIC INTERFACE - WEIGHT | 113g (0.25 lbs.) |
| LOGIC INTERFACE - CONNECTOR | 11 pin male connector (JEDEC B11-88) |
| AVAILABLE KITS | LRS-FP-50-K, LRS-FP-100-K, LRS-DB-50-K, LRS-DB-100-K |
| INDIVIDUAL PARTS | LRS-C1, LRS-FP-50, LRS-FP-100, LRS-DB-50, LRS-DB-100, LRS-LC |
LRS Vehicle Detector from Alfa Iris is a cutting-edge loop replacement system that simplifies vehicle detection with advanced 3-axis magnetoresistive sensing. Designed for both above or below ground installation, it ensures high detection sensitivity and reduced installation effort compared to traditional inductive loops. With the exclusive DETECT-ON-STOP™ feature, it detects only when vehicles come to a complete stop, eliminating false detections from cross traffic.
Smart Detection with Simplified Installation
The LRS system minimizes labor with a single saw cut installation and includes the ULTRAMETER™ sensitivity display for easy setup. Its compact design and built-in ambient memory provide seamless integration and consistent performance. The optional Logic Interface enhances zone coverage and directional detection, ideal for commercial and tight-space access control setups.
- 3-axis magnetoresistive vehicle detection (X, Y, Z)
- Single cut, loop-less installation for cost efficiency
- DETECT-ON-STOP™ feature filters out cross traffic
- ULTRAMETER™ for optimized sensitivity settings
- Standalone sensor with remote programming option
Reliable and Configurable for Varied Installations
Compatible with a wide power range (12-30 VDC and 24 VAC), the LRS system supports flexible deployment across industrial, gated, and commercial environments. Installers benefit from intuitive controls, multiple output options, and automatic environmental compensation for consistent performance.
- Access control in gated communities and commercial sites
- Drive-thru detection for quick service applications
- Industrial and facility entry/exit monitoring
Professionals seeking a dependable, low-maintenance vehicle detection solution will find the LRS Vehicle Detector from Alfa Iris ideal for high-accuracy applications. Available through trusted USA access control distributors.
Technical Specifications
- Sensing Technology: 3-axis magnetoresistive (X, Y, Z)
- Power Input: 12–30 VDC / 24 VAC
- DETECT-ON-STOP™: Detection after 1–2s vehicle stop
- Output: SPDT relay / NPN open collector
- Environmental Rating: IP30 (Control Unit), IP69K (Sensor)
- Installation: Above or below ground with single saw cut
- Accessories: Optional Logic Interface for zone extension
- Sensitivity Levels: 10-level adjustment (0–9)
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