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Small black rectangular car security sensor with model number 508D

Directed Electronics

Directed Electronics 508D car electronics accessory

SKU CH-M9HH-MQBJE MPN 508D

A dual-zone radar sensor that detects moving high-density objects using RF field-disturbance technology for vehicle-intrusion protection

  • Product typeAmplifier & Processor Remotes
  • Key featuresThe most effective vehicle-intrusion sensor. This dual zone
  • Effective intrusion detection with dual-zone radar sensing moving high-density objects via RF field-disturbance technology
  • Adjustable protection offering Warn Away® response or full alarm activation for graduated security
  • Ideal for convertibles and trucks where zone-intrusion protection is desired without physical contact sensors
  • Two invisible detection fields surround the vehicle providing comprehensive coverage against unauthorised entry
  • Reliable RF field-disturbance technology detects moving objects ensuring consistent intrusion monitoring performance

Dual-zone RF field-disturbance sensor

This Directed Electronics 508D accessory creates two invisible detection zones around a vehicle using RF field-disturbance technology. It identifies moving high-density objects that enter either zone. The unit is designed for automotive security systems that require perimeter intrusion detection.

Suited for convertibles and open-top vehicles

The sensor works well where traditional interior volumetric sensors cannot operate, such as soft-top cars, trucks with open beds or any vehicle where windows are left down. It is not suited for installations that require only a single detection zone or for systems lacking a compatible dual-zone alarm controller.

Dual-zone detection capability

The defining specification is the dual-zone architecture that generates two separate RF fields and can trigger either a warn-away response or a full alarm depending on which zone is breached. This capability determines whether the sensor matches the coverage and escalation logic your security system expects.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $24.99
Pricier than about 56% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameDirected
Model name508D
Product typeAmplifier & Processor Remotes
Size & build
Shipping weight0.14 kg
Package size206 × 165 × 56 mm

Questions about this item

How does the 508D sensor handle continuous RF field-disturbance scanning without false triggers?

The dual-zone radar creates two invisible detection fields around the vehicle, filtering moving high-density objects so only genuine intrusions generate a Warn Away® response or full alarm.

Does the 508D draw enough current to drain the battery when armed for days?

As a low-power radar sensor it draws minimal standby current, letting the vehicle sit armed for extended periods without measurable battery impact.

Which security system interfaces does the 508D plug into for zone-intrusion output?

It connects to compatible Directed alarm control modules that accept dual-zone radar inputs, enabling Warn Away® and full-alarm triggers on the existing siren.

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