Single Channel Vehicle Detector

Single Channel Vehicle Detector

'Reliability and Durability Combined'

Identifies the presence of vehicles by means of an inductive loop buried under the road. The range includes PD130, PD132, PD134, PD139, PD232, PD234 products

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Product Features & Benefits

These “single chip” microprocessor-based units benefit from a detect filter and frequency indicator and are suitable for parking control and motorised door or gate applications all detectors are CE tested and approved.

Single channel loop detectors are available in both boxed and PCB format.

A compact detector diagnostic unit is available for extracting data from new and existing sites.


  • Compact size
  • Diagnostic capabilities (when used with a DU100)
  • Selectable permanent presence (to eliminate premature barrier / gate closure)
  • Loop isolation protection
  • Loop frequency indication (to eliminate interference with adjacent loops)
  • Automatic sensitivity boost (ASB) – for reliable detection of high-bed vehicles (e.g. lorries)
  • Detect filter – for screening out unwanted inputs
  • Powerfail memory (optional) – to retain presence when power is restored
  • The range includes the following products: PD130, PD132, PD134, PD139, PD232, PD234


Self tuning range: 20-1500μH
Sensitivity: 4 step adjustable

High: 0.02% ΔL/L;

Medium High: 0.05% ΔL/L;

Medium Low: 0.1% ΔL/L;

Low: 0.5% ΔL/L
Frequency: 4 step adjustable, 12-80kHz

(Frequency determined by loop geometry)
PD130 Output Relays: Presence output relay - Change-over contacts (fail-safe) rated at 5A @ 230V AC

Pulse output relay - Change-over contacts (non-fail-safe) rated at 5A @ 230V AC
PD139 Output Relay: Presence output relay - Change-over contacts (fail-safe) rated at 1A @ 230V AC

Pulse output relay - Change-over contacts (non-fail-safe) rated at 1A @ 230V AC
PD130 Pulse output duration: Approx. 150ms, factory option 250ms
PD139 Pulse output duration: Approx. 150ms
Presence time: 1 hour for 3% ΔL/L, permanent presence option
Protection: Loop isolation transformer, zener diode clamping on loop inputs and gas discharge tube protection
PD130 Power requirements: 120V AC +/- 15% 48-60Hz (PD131)

230V AC +/- 15% 48-60Hz (PD132)

12-24V AC/DC +/- 15% (PD134)
Current requirement: 1.5VA max @ 230V
PD139 Power requirements: 24V AC/DC +/- 15%
Current requirement: 1.1VA max @ 24V DC
Operating temp range: -40oC to +80oC (circuit sealed against condensation)
Material: PD130: High heat ABS blend
Dimensions (mm): PD130: 76 x 40 x 78;

PD139: 105 x 68
Mounting: PD130: Shelf or DIN-rail socket

PD139: Panel or plug-in
Connector: PD130: Single rear mount 11-pin submagnal (86CP11);

PD139: Molex 10-pin female
Option: Flying leads