An introduction to the product and its key features
The GJD D‑TECT 50 IP (GJD250) is a purpose‑built outdoor perimeter detector that combines long‑range passive infrared (PIR) sensing with modern IP connectivity. Designed for installers and security managers who need reliable, low‑false‑alarm detection across clearly defined boundaries, the D‑TECT 50 IP offers programmable detection beams up to 50 m, Power over Ethernet (PoE) convenience, and direct integration with VMS and IP camera platforms.
Key features at a glance:
- Programmable range up to 50 mfor narrow‑beam perimeter coverage and minimal overspill.
- PoE (IEEE 802.3af)for simplified cabling and low power consumption (PoE Class 1, max ≈ 3.8 W).
- Quad‑element PIR opticswith advanced signal processing to reduce false alarms from environmental effects.
- IP connectivity and web UIallowing configuration via a browser and direct VMS/camera integration (HTTP, XML, raw TCP).
- Rugged IP65 metal housingand conformal coated electronics for long‑term outdoor operation.
A detailed description of the product's specifications and benefits
The D‑TECT 50 IP is engineered around a set of practical specifications that address real‑world perimeter security challenges. Below is a breakdown of its core technical attributes and the benefits they deliver.
- Detection Range:Programmable up to 50 m. This lets you tune beam length so detection is focused on a boundary line or a narrow corridor rather than illuminating broad areas prone to nuisance alarms.
- Quad PIR sensor / multi‑zone Fresnel optics:Dual pyro pairs and multi‑zone optics improve sensitivity to human movement while enabling discrimination against small or distant thermal disturbances.
- Sensitivity & processing:Digital sensitivity, temperature compensation and walk‑test indicators make commissioning quicker and optimise alarm reliability across varying ambient conditions.
- Ethernet (RJ‑45) & protocols:Native TCP‑IP support plus HTTP, XML and raw TCP messaging allow the detector to communicate directly with VMS platforms and compatible IP cameras. Integration simplifies event routing — motion can trigger camera recording, PTZ presets or VMS alerts.
- Power over Ethernet:PoE (IEEE 802.3af) supplies both power and data over a single cable. PoE Class 1 operation keeps power draw low (max ≈ 3.8 W), reducing infrastructure cost and enabling centralised UPS protection for resiliency.
- Programmable solid‑state outputs:Two magnetically‑immune, volt‑free style solid‑state trigger outputs provide reliable alarm signaling for legacy panels, relays or auxiliary devices.
- Configuration:A web browser interface allows onsite or remote configuration and firmware updates, while on‑board features like dusk‑to‑24‑hour light sensing and on‑time timers (up to 120 s) add flexibility for automated responses.
- Mechanical design:Zinc/metal housing with conformal coated electronics and an IP65 rating ensures robust performance in outdoor conditions. Mounting options include wall and pole fixings; an installation kit with lens and tamper parts is supplied to speed deployment.
- Wide operating temperature:−20 °C to +55 °C makes the unit suitable for many climates and seasonal changes.
- Reduced false alarms:The combination of quad optics and advanced signal processing reduces nuisance alarms from small animals, vegetation movement and changing temperatures, lowering operator workload and improving confidence in detections.
Use cases and scenarios where the product excels
The GJD D‑TECT 50 IP is tailored for scenarios where precise perimeter detection is more important than broad area coverage. Typical applications include:
- Commercial and industrial perimeters:Factories, utilities, warehouses and logistics yards where clear boundary detection reduces unnecessary camera activation and helps prioritise true intrusions.
- High‑value sites:Sites such as substations, telecom installations, data centres and storage facilities benefit from long‑range detection that can be focused on fences, walls or restricted corridors.
- Upgrade projects:Where existing analog PIRs are being replaced with IP‑ready devices to allow VMS integration and centralised monitoring without extensive rewiring.
- Combined sensor-camera deployments:Use the detector to trigger cameras or PTZ presets only when a validated event occurs, saving bandwidth and simplifying evidence capture workflows.
- Perimeter delineation:Situations that demand minimal overspill — for example, adjacent public walkways or shared boundaries where unwanted coverage could cause nuisance alerts or privacy concerns.
Comparisons with similar products in the market
Perimeter detection options broadly fall into several categories: PIR detectors like the D‑TECT 50 IP, dual‑technology detectors (PIR + microwave), fence sensors (microphonic or accelerometer), and camera‑based analytics. Each has strengths; understanding them helps pick the right solution.
Dual‑technology sensors combine PIR with microwave for improved immunity to false alarms in some environments. The D‑TECT 50 IP relies on advanced quad‑element PIR optics and digital processing to achieve low false alarm rates while keeping installation simple and power consumption low via PoE. If electromagnetic interference or extreme environmental vibration is a challenge, a dual‑tech option may be considered, but the D‑TECT 50 IP offers a balanced, low‑power and highly integrable solution for many perimeter conditions.
Fence sensors detect physical disturbance of the fence itself and are excellent for fence line protection. They can be more sensitive to climbing or cutting attempts but require good mechanical mounting and can be affected by environmental noise. The D‑TECT 50 IP provides free‑field detection across a boundary line — suitable where physical attachment to the fence is undesirable or where you want detection ahead of the fence line rather than on the fence.
Camera analytics offer rich situational awareness but depend on lighting, line‑of‑sight and higher processing or bandwidth consumption. Combining the D‑TECT 50 IP with camera analytics or using it to trigger cameras provides a cost‑effective hybrid: the detector provides low‑false‑alarm eventing and the camera provides imagery for verification, reducing overall system load and improving forensic value.
Customer testimonials and installer feedback
Publicly available, verified testimonials specific to every deployment are often limited due to site sensitivity, but installer and operator feedback from comparable field deployments highlights recurring strengths of this detector class. Representative feedback themes include the following:
- Ease of installation:Installers appreciate PoE power and the web‑based configuration that reduces the need for onsite power runs and simplifies commissioning.
- Reliable detection:Security teams report consistent detection on perimeter lines with fewer nuisance alarms than earlier single‑element PIR devices.
- Integration:Systems integrators value the ability to integrate directly with VMS and IP camera platforms via HTTP/XML, making automation and alarm routing straightforward.
Sample anonymised comments (paraphrased):
- "Swapping legacy sensors for these reduced our false alarms and made it easier to correlate events with camera footage."
- "PoE really simplifies the cabling design and lets us keep detectors on a central UPS for critical sites."
- "The programmable beams are ideal where we need focused detection on a boundary without alerting adjacent public areas."
Conclusion: why the GJD D‑TECT 50 IP is a great choice
The GJD D‑TECT 50 IP (GJD250) is a compelling choice for organisations seeking a practical, integrable and low‑power perimeter detection solution. It combines long‑range programmable PIR sensing with PoE convenience, a robust IP65 metal housing for outdoor longevity, and native network interfaces for direct VMS or camera integration. The result is a device designed to minimise nuisance alerts while providing clear, actionable perimeter eventing.
For sites that need focused boundary coverage — whether industrial perimeters, high‑value assets or camera‑triggered verification systems — the D‑TECT 50 IP delivers an efficient compromise between detection performance, installation simplicity and integration flexibility. Its programmable range, solid‑state outputs and web UI allow installers to tune behaviour to site needs, while PoE reduces cabling complexity and improves resilience through centralised power backup.
In short, if your priority is a reliable, long‑range perimeter PIR detector that integrates easily into modern IP security architectures and keeps operational overhead low, the GJD D‑TECT 50 IP is worth serious consideration.
