EMX LP D-TEK Low-Power Vehicle Loop Detector – 12–24V AC/DC, Solar Compatible

The EMX LP D-TEK is a low-power inductive vehicle loop detector designed for automatic gates, commercial doors, parking systems, and access-control applications where reliable vehicle detection is required with minimal electrical power consumption.

Drawing less than 9 mA, the LP D-TEK is especially well suited for solar-powered gate operators and installations where several accessories share the operator's limited accessory power supply.

When connected to a properly installed inductive loop buried beneath a driveway or roadway, the detector senses the presence of a metallic vehicle and provides relay outputs that can be used for free-exit, safety, presence, or other vehicle-detection functions.

Product Features

• Low-power EMX vehicle loop detector

• Less than 9 mA current consumption

• Excellent choice for solar-powered gate systems

• 12–24V AC/DC operation

• Single-loop vehicle detection

• 10 adjustable sensitivity levels

• Fail-safe or fail-secure operation

• Automatic sensitivity boost

• Presence and pulse operating modes

• Delay function

• Extend function

• Built-in loop conditioner

• Full loop diagnostics

• Frequency counter

• Multiple selectable loop frequencies

• 2 output relays

• Transformer-isolated loop input

• Built-in surge and transient protection

• Durable anodized aluminum RF-shielded housing

• Automatic tuning during startup/reset

Specifications

• Manufacturer: EMX Industries

• Model: LP D-TEK

• Manufacturer Part Number: EMX-2500-1

• Product Type: Low-Power Inductive Vehicle Loop Detector

• Power Supply: 12–24V AC/DC

• Current Consumption: Less than 9 mA

• Detection Channels: 1

• Sensitivity Settings: 10

• Loop Inductance Range: 20–2000 µH

• Minimum Loop Q Factor: 5

• Operating Modes: Fail Safe / Fail Secure

• Outputs: 2 Relays

• Relay Rating: 1A @ 30VDC

• Loop Input: Transformer Isolated

• Tuning: Automatic at Reset or Power-Up

• Environmental Tracking: Automatic

• Operating Temperature: -40°F to 180°F

• Housing: Extruded Anodized Aluminum

• Connector: 11-Pin Male

• Approximate Size: 3.25" × 2.56" × 3.65"

What Is It Used For?

The LP D-TEK connects to an inductive wire loop installed underneath a driveway or traffic lane.

When a vehicle enters the loop's electromagnetic field, the detector recognizes the change in inductance and activates its output relay.

Depending on how the gate or door operator is wired, the detector can be used to:

• Automatically open a gate when a vehicle exits

• Detect a vehicle waiting at an entrance

• Prevent a gate from closing while a vehicle remains in the protected area

• Provide vehicle-presence information to an access-control system

• Trigger parking or traffic-control equipment

Ideal for Solar Gate Operators

One of the biggest advantages of the LP D-TEK is its extremely low power requirement.

With less than 9 mA current draw, it is particularly useful where accessory power is limited, including:

• Solar gate operators

• Battery-powered access systems

• Remote gate installations

• Operators powering multiple accessories

Lower accessory consumption can help reduce the electrical load placed on the gate operator's battery and solar charging system.

Fail-Safe & Fail-Secure Operation

The LP D-TEK can be configured for either fail-safe or fail-secure operation depending on the installation.

This gives professional installers flexibility when configuring vehicle-presence and access-control functions.

The correct operating mode should always be selected according to the gate operator manufacturer and the intended application.

10 Sensitivity Settings

Ten selectable sensitivity levels allow the detector to be adjusted for different:

• Loop sizes

• Installation depths

• Vehicle sizes

• Pavement conditions

• Site requirements

Proper sensitivity adjustment helps provide reliable vehicle detection while reducing unwanted activations.

Automatic Sensitivity Boost

Automatic Sensitivity Boost helps maintain vehicle detection after the initial vehicle presence is detected.

This can be particularly useful for higher-clearance vehicles such as:

• Trucks

• SUVs

• Delivery vehicles

• Commercial vehicles

Built-In Loop Diagnostics

The LP D-TEK provides diagnostic functions to help installers evaluate the condition and performance of the connected loop.

Features include:

• Loop diagnostics

• Frequency counter

• Loop conditioning

• Automatic tuning

• Environmental tracking

These functions can help identify marginal loops, wiring problems, or installation conditions that may affect reliable detection.

Loop Protection

The loop input incorporates transformer isolation and protection against lightning-induced and electrical transients.

Additional surge-protection components help protect the detector's power, loop, and output circuits in demanding gate and access-control installations.

11-Pin Installation

The LP D-TEK uses a standard 11-pin male connector.

A compatible 11-pin socket or wiring harness is required for installation.

Common compatible accessories include:

• EMX LD-11 DIN-rail socket base

• EMX HAR-11 wiring harness

Socket, harness, loop wire, and preformed vehicle loop are sold separately unless specifically stated otherwise.

Common Applications

Ideal for:

• Automatic gate operators

• Solar-powered gate systems

• Commercial garage doors

• Parking facilities

• Apartment and HOA entrances

• Industrial facilities

• Warehouse entrances

• Free-exit systems

• Vehicle-presence detection

• Access-control systems

Package Contents

• 1 – EMX LP D-TEK Low-Power Vehicle Loop Detector

Inductive loop, 11-pin socket, wiring harness, loop sealant, and other installation accessories are sold separately.

Important Compatibility Note

The LP D-TEK is a loop detector only. A properly designed and installed inductive vehicle loop is required for vehicle detection.

One detector is generally required for each independent loop function.

Before ordering, verify:

• Available 12–24V AC/DC power

• Required gate/operator function

• Loop inductance

• Socket or harness compatibility

• Fail-safe or fail-secure requirements

Important Safety Information

Vehicle loop detectors are intended to detect metallic vehicles and should not be relied upon to detect pedestrians, bicycles, animals, or other non-vehicular obstructions.

When used with an automatic gate or commercial door, install and configure the detector according to the operator manufacturer's instructions and all applicable safety requirements.