Introduction to the GJD Elite External PIR Detector (GJD023) and its key features
The GJD Elite External PIR Detector (model GJD023) is a compact, weatherproof passive infrared (PIR) motion sensor engineered for reliable perimeter and external motion detection. Designed for CCTV auto‑switching, timed lighting and alarm integration, it combines a high‑resolution 36‑zone Fresnel multi‑beam lens with a custom optical and ASIC signal‑processing system. The result is a programmable detector with selectable detection range, pulse‑count options for improved false‑alarm immunity, masking for unwanted beams and multiple outputs to interface with cameras, lights and alarm panels.
Key highlights include a programmable detection range of 10–35 m (covering up to ~750 m²), two volt‑free relay outputs for CCTV/video switching, two open‑collector outputs for lighting or indicators, a digital white‑light filter and a weatherproof IP55 housing with conformally coated electronics for enhanced outdoor reliability.
- 36‑zone Fresnel lens with area reduction masking to tune coverage and ignore irrelevant zones.
- Programmable detection range (10–35 m) and pulse‑count selection (1–4) for balancing sensitivity and false‑alarm resilience.
- Multiple outputs (2 relays + 2 open‑collector outputs) for flexible integration with CCTV, lighting and alarm systems.
- Digital white‑light filtering and double silicon‑shielded sensors to resist sunlight‑induced false alarms.
- Weatherproof IP55 housing with UV‑stable ABS and conformal coating for outdoor use.
Detailed specifications and benefits
The GJD023’s specification set is oriented towards installers and technically capable users who need configurable external motion detection. Below is a focused breakdown of important specifications and the practical benefits they deliver.
- Detection range:Adjustable 10–35 m (selectable). Benefit: tunable coverage for short driveways or long perimeters without changing hardware.
- Coverage angle:90° multi‑beam (up to ~35 m × 30 m maximum). Benefit: broad coverage for gates, driveways and garden areas while keeping installation simple.
- Lens:36‑zone Fresnel with white‑light filter and supplied masking tape. Benefit: high spatial resolution of detection and the ability to reduce sensitivity in specific beams to avoid known nuisance areas (e.g., road, neighbour’s hedge).
- Pulse‑count selection:Selectable 1–4. Benefit: trade‑off between sensitivity and false alarm immunity — a higher pulse count reduces false positives from small animals or brief thermal disturbances.
- CCTV / Relay outputs:Two volt‑free relay contacts (selectable NO/NC) with adjustable timers (manufacturer lists 0.4–60 s). Benefit: reliable, dry contacts for camera input triggers and alarm panel interfacing.
- Relay rating:Listed ~24 VAC/DC @ 50 mA. Benefit/limitation: fine for signalling and low‑voltage control, but use external relays or contactors to switch mains lighting or heavy loads.
- Open‑collector outputs:Output A: 25 mA pulse on detection (400 ms). Output S: 25 mA detection + 60 s (photocell‑controlled/adjustable dusk threshold). Benefit: quick and simple low‑current control of LED indicators or downstream logic inputs; photodiode control helps prevent daytime activation of lighting circuits.
- Supply voltage:9–15 V DC (nominal 12 V). Typical current ≈10 mA at 12 V. Benefit: low power draw - can be powered from typical CCTV or alarm system supplies.
- Operating temperature:−20°C to +55°C. Benefit: suitable for most temperate climates.
- Protection / ingress:IP55 with UV‑stable, high‑impact ABS housing and conformally coated electronics. Benefit: good resistance against rain and dust, and improved longevity in outdoor deployments.
- Physical size:Compact — approx. 104 × 100 × 100 mm and ~145 g. Benefit: small footprint that is easy to mount on walls, posts or under eaves.
- Programmability allows installers to match detection to the site rather than the other way round, reducing nuisance alarms and improving reliability.
- Multiple, selectable outputs enable the GJD023 to act as a single device for lighting, CCTV switching and alarm signalling — simplifying installation and cabling.
- Low standby current makes it appropriate for battery‑backed or solar‑supported systems when paired with suitable power management.
Use cases and scenarios where the GJD023 excels
The GJD Elite External PIR Detector is particularly well suited to several common outdoor detection scenarios:
For commercial sites, warehouses or private properties that require early detection of intruders approaching fences, gates or boundary lines, the GJD023 offers long adjustable range and zone masking so you can ignore roads or neighbouring properties while focusing on relevant approaches.
Driveway installations benefit from the 10–35 m adjustable range and the detector’s ability to trigger CCTV or lighting only when a vehicle or pedestrian arrives. The open‑collector dusk‑controlled output (Output S) is useful for switching lighting only at night.
The two volt‑free relays are purpose‑built for video switching and alarm interfaces. Short trigger times or adjustable hold times let cameras or recording systems be triggered only when motion is verified, conserving recording space and reducing false events.
Use the detector to manage timed lighting for security or welcome lighting. Photocell control minimizes daytime activations; for mains lighting, couple the low‑current outputs to a relay-rated driver or lighting relay.
Installers can wire the volt‑free relays into alarm panels as perimeter or external triggers, with programmable pulse‑count and tamper behaviour to meet system requirements.
Comparisons with similar products on the market
When comparing outdoor PIR detectors, there are a few axes to consider: detection resolution (number of zones), programmability, weatherproofing, false‑alarm resistance, and interface options.
- Versus basic outdoor PIRs:Many entry‑level outdoor PIRs offer fixed range and limited beam control. The GJD023’s 36‑zone lens and area masking give much finer control, reducing the need for mechanical re‑aiming or device relocation.
- Versus dual‑technology detectors (PIR + microwave):Dual‑tech units often reduce false alarms by requiring both sensors to trigger. The GJD023 achieves improved immunity through digital white‑light filtering, pulse‑count selection and masking — reducing false activations from sunlight and small animals while avoiding some complexities of microwave tuning and potential interference.
- Versus premium outdoor detectors:Higher‑end devices may offer extended IP ratings (IP66/67), integrated temperature compensation, or more powerful relay outputs for direct mains switching. The GJD023 balances cost, programmability and weather resistance (IP55) making it a practical, cost‑effective choice for many installations; where harsher environments or direct mains switching are required, installers should choose devices with higher ingress protection or use external relays/contactors.
Customer testimonials and installer feedback
There are no verified public customer testimonials included with the product data provided here. Anecdotally, feedback from installers using comparable GJD Elite detectors tends to highlight the following themes:
- Installers appreciate the fine zoning and masking options, which reduce site visits to adjust detection after commissioning.
- Low power consumption and compact form factor make the unit easy to integrate into existing CCTV and alarm systems.
- Some installers note the need to use an external relay or interface to switch mains lighting due to the detector’s low relay current rating.
If you require verified customer reviews, check with your reseller or look for independent reseller reviews and forum feedback specific to the GJD023 model.
Installation tips and practical considerations
- Mount roughly 3 m high for optimum performance (can be mounted up to ~6 m, but sensitivity and coverage will change).
- Use the supplied masking tape to block unwanted beams that point at reflective surfaces, neighbouring properties or public footpaths.
- Avoid pointing the lens toward direct sunlight, large reflective surfaces or heat sources (air‑con vents, chimneys) to reduce false alarms.
- Because relay contacts are low‑power rated (~50 mA), use intermediate relays or contactors when switching mains lighting or heavy loads.
- Follow all local wiring regulations and the manufacturer’s installation manual for wiring diagrams, programming tables and safety guidance.
Conclusion — Why the GJD GJD023 is a great choice
The GJD Elite External PIR Detector GJD023 is a practical, programmable and cost‑effective outdoor motion detector for a wide range of security and lighting control applications. Its 36‑zone Fresnel lens, adjustable 10–35 m range, pulse‑count selection and area masking deliver reliable, site‑tuned detection while the combination of volt‑free relays and open‑collector outputs offers flexible integration with CCTV, alarms and lighting. Weatherproofing and conformally coated electronics add resilience for outdoor deployments.
While installers should be mindful of the modest relay current ratings (and use external drivers for mains loads) and consider IP rating needs for very exposed locations, the GJD023 represents a strong balance of capability, programmability and value for perimeter detection, driveway monitoring and CCTV switching tasks. For installers and technically capable DIYers seeking a reliable external PIR with good false‑alarm mitigation and flexible outputs, the GJD GJD023 is well worth considering. Suggested retail price (indicative): 80.00; consult your reseller for current pricing, warranty terms and supply details.
