Single‑Loop Detector is a single‑channel inductive vehicle loop detector, widely deployed for boom barrier gates, automatic gate operators, parking access‑control and traffic‑monitoring systems.Buried road loop wire senses metal inductance changes when vehicles pass over. The unit converts inductance variation into reliable relay switching signals for gate opening‑closing, anti‑crash protection and vehicle presence detection.
Support multi‑voltage power input, 4‑grade sensitivity adjustment, four working‑frequency options, automatic sensitivity boost and anti‑interference filter mode. Dual relay outputs with configurable logic via DIP switches to match diverse automation project requirements.Many installers worry about false triggering, signal interference, outdoor temperature tolerance and complex configuration. This PD132 loop detector addresses these real‑world pain‑points with adjustable sensitivity, frequency shifting, built‑in anti‑interference filter and wide‑range operating temperature for outdoor harsh conditions.
Key Benefits
Avoid false triggering：4‑level sensitivity + anti‑interference filter mode, reduce mis‑detection caused by surrounding electromagnetic noise.
Wide power compatibility：Supports AC110‑220V and DC12‑24V, works with most gate control boards globally.
Flexible relay logic：4‑configurable dual‑relay output modes by DIP switch, match different boom‑barrier and gate brand requirements.
Anti‑crosstalk for multi‑loop projects：4 selectable working frequencies, stop signal conflict when multiple loop detectors are installed close together.
Outdoor stable performance：‑20°C ~ +65°C working temperature, suitable for hot summer and cold winter outdoor projects.
Easy installation & auto‑calibration：Power‑on self‑calibration, no complicated manual tuning at first startup.
Auto‑sensitivity boost：Improve detection reliability for heavy vehicles like trucks, vans and SUVs.
Clear LED status feedback：Power LED & detection LED help you judge working status quickly without extra testing tools.
Manual reset button：One‑click reset to clear abnormal status and return to vehicle‑free standby mode.
Technical Specifications
| Item | Specification |
|---|---|
| Model | PD132 Single‑Loop Detector |
| Power Input | AC 110/220V ±10% 50/60Hz; DC 12/24V |
| Working Temperature | ‑20 °C ~ +65 °C |
| Humidity | Non‑condensing environment |
| Detection Mode | Single‑channel inductive loop detection |
| Sensitivity | 4‑level adjustable via DIP3 & DIP4 |
| Frequency | 4‑option adjustable (DIP1 & DIP2), avoid adjacent‑loop crosstalk |
| Relay Output | Dual‑relay K1(Pin3‑4), K2(Pin5‑6); four configurable logic modes |
| Presence Mode | Unlimited presence / Limited 500 ms pulse output |
| Calibration | Automatic self‑calibration on power‑up |
Common Application
Boom barrier gate anti‑crash vehicle detection
Automatic sliding / swing gate vehicle trigger
Commercial & residential parking lot access‑control
Factory entrance vehicle‑detection projects
FAQ
Q1: Will this loop detector work with my existing boom barrier gate?
A: PD132 supports wide‑voltage input and configurable dry‑contact relay output. It is compatible with most boom‑barrier / automatic gate control boards on market. Please confirm your gate controller accepts dry‑relay signal input.
Q2: How to prevent interference if I install multiple loop detectors next to each other?
A: Set different frequency DIP settings for adjacent detectors, this eliminates crosstalk between loops.
Q3: Can it work under extreme hot or cold weather outdoors?
A: Working range ‑20°C ~ +65°C. It fits most global outdoor climate conditions. Avoid installing the detector main unit inside direct continuous sun‑baking sealed cabinet without ventilation.
Q4: What size loop cable should I buy?
A: Minimum 1.5 mm² insulated copper cable for buried loop. Feeder wire needs same specification and must be twisted.
Q5: Do I need professional technician for installation?
A: Road‑cutting and loop‑cable burying requires road construction work. We suggest hiring a qualified gate/install technician for physical loop laying; configuration and DIP‑switch setting are simple after wiring finished.
Q6: What does filter mode do? Should I always keep filter ON?
A: Filter mode suppresses strong electromagnetic disturbance. But it will slightly increase response delay and lower sensitivity. We recommend DIP6 OFF by default; only turn it ON if you face serious site interference.
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