The Dahua SDT4E425-8P-GB-APV1 X-Spans camera provides comprehensive security by combining a wide-angle panoramic view with a powerful PTZ (Pan-Tilt-Zoom) camera. It's designed for users who need to monitor large areas while also being able to zoom in on specific details and track activity. This single camera system reduces installation complexity and costs compared to deploying multiple cameras.
Key Features
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Expansive Area Coverage: Get a complete 180° panoramic view of your entire property, eliminating blind spots.
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Detailed Zoom & Tracking: The PTZ camera can zoom in 25 times to capture fine details and automatically follow moving objects.
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Clear Night Vision: See clearly even in very dim light with Starlight technology, including both infrared and smart white light for full-color video when activity is detected.
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Smart Human & Vehicle Detection: Advanced AI accurately identifies people and vehicles, significantly reducing false alarms from other movements.
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Automated Protection: Set up custom rules for the camera to automatically track targets, trigger audible alarms, and activate red and blue warning lights.
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Two-Way Audio: Communicate directly through the camera with a built-in speaker and microphone, useful for warnings or greetings.
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Local Storage: Record footage directly onto a microSD card, supporting up to 512 GB for convenient on-device storage.
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Weatherproof Design: Built to withstand harsh outdoor conditions, ensuring reliable operation year-round.
Perfect For:
- Large backyards and estates
- Commercial parking lots
- School campuses
- Warehouse exteriors
- Perimeter security for businesses
- Public park monitoring
Installer Tips
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Optimal Placement: For the best panoramic coverage and PTZ tracking, mount the camera in a central location that offers an unobstructed view of the area you want to monitor.
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PoE Advantage: Utilize Power over Ethernet (PoE 802.3at) for simpler installation, as it delivers both power and data through a single Ethernet cable, reducing wiring complexity.
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Height for Deterrence: When using active deterrence features, consider mounting the camera at a height where the red-blue lights and audible alerts are clearly visible and impactful, typically above eye level but not excessively high.
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Network Bandwidth: Ensure your network has sufficient bandwidth to handle three simultaneous video streams, especially if you plan to utilize all channels at their maximum resolution and frame rate.
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Custom Audio Alerts: Prepare custom audio files (e.g., specific warnings or greetings) in advance to upload for tailored active deterrence scenarios.
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Testing AI Rules: After installation, thoroughly test your configured Perimeter Protection and Auto Tracking rules to ensure they are accurately detecting targets and minimizing false alarms for your specific environment.
Downloads
Quick-Read Specs
| Feature |
Specification |
| Resolution |
Panorama: 8MP (4096 × 1860); Detail: 4MP (2560 × 1440) |
| Lens Options |
Panorama: 2.8 mm; Detail: 5 mm–125 mm (25x optical zoom) |
| Night Vision |
Starlight IR (100m) + Smart Dual Light (White Light for Color, 50m) |
| Deterrence |
Red-Blue light warning; Customizable siren (11 pre-set, 10 custom) |
| AI Features |
Perimeter Protection (tripwire, intrusion, etc.), SMD 4.0, Smart Tracking, Auto Tracking 3.0 |
| Audio |
1 input, 1 output (built-in speaker) |
| Storage |
Micro SD card (up to 512 GB) |
| Power |
12 VDC, 3 A; PoE (802.3at) |
| Weather Rating |
IP66; TVS 6000 V lightning proof, surge, and voltage transient protection |
What is TIOC?
TiOC stands for Three-in-One Camera, combining Full-Colour Video, Active Deterrence, and AI Detection into one powerful security solution.
With TiOC cameras, you get:
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Full-Colour Footage 24/7 – even at night, thanks to Smart Dual Illuminators.
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Smart AI Detection – accurately identifies humans and vehicles, filtering out false
alarms caused by animals, trees, or shadows.
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Active Deterrence – red and blue warning lights plus a loud siren to stop intruders in their tracks.
These features work together to give you fast, accurate alerts and clear footage any time of day.
How Does It Work?
1. Full-Colour Night Vision with Smart Dual Illuminators
TiOC cameras automatically switch between infrared and LED lighting. When no threat is detected, they use discreet IR. When a person or vehicle enters the scene, the LED lights activate to record in full colour—helping you capture every detail clearly.
2. AI-Powered Detection
Using SMD 4.0 (Smart Motion Detection) and Perimeter Protection, the camera can tell the difference between a person, vehicle, animal, or object. This means:
- You get alerts only when it matters.
- False alarms are reduced to less than 1%.
3. Active Deterrence
When a genuine threat is detected, the camera activates built-in red and blue strobe lights along with a loud audible siren to immediately deter intruders. This proactive response helps prevent incidents before they occur. Users can schedule deterrence features to operate during specific hours—such as overnight—or customise them to suit their needs. For added convenience, a one-touch disarm function allows quick cancellation of the siren when necessary.
Extra Info
Smart Dual Illumination
This camera features Dahua's Smart Dual Light technology, which provides a balance between stealthy infrared (IR) night vision and full-color recording when needed. Typically, at night, the camera uses its IR illuminators, offering clear black-and-white video without drawing attention. However, when the camera detects a target within the monitoring area (using its smart algorithms), it automatically activates its white light illuminators. This allows the camera to capture full-color video of the event, providing richer detail and better evidence. Once the target leaves the area, the white light turns off, and the camera switches back to IR, efficiently reducing light pollution and power consumption. This intelligent system ensures you get crucial full-color information only when it matters most.
SMD 4.0
SMD 4.0 (Smart Motion Detection) is an advanced AI feature that significantly improves the accuracy of motion detection by intelligently filtering out irrelevant movements. Unlike basic motion detection that might trigger an alarm for rustling leaves, rain, or small animals, SMD 4.0 uses deep learning algorithms to accurately identify human and vehicle shapes. This drastically reduces false alarms, saving you time and ensuring that you only receive alerts for events that genuinely require your attention, making your security system much more efficient and reliable.
Active Deterrence (Lights + Audio)
The camera's active deterrence capabilities go beyond just recording. It features powerful red and blue flashing lights, similar to emergency vehicles, which are highly effective at deterring intruders. Complementing this visual warning, the camera also has a built-in speaker that can play 11 pre-set alarm sounds or up to 10 custom audio messages you can upload. This allows for tailored responses, such as a verbal warning like "You are on camera, please leave the premises," which can be highly effective in preventing incidents before they escalate. You can configure these deterrents to activate automatically when a specific event (like an intrusion) is detected.
Seamless Integration & Management
This camera is designed for seamless integration into a comprehensive security system. It supports ONVIF (Profile S, G, and T), CGI, and SDK, ensuring compatibility with a wide range of network video recorders (NVRs) and video management software (VMS) from various manufacturers. For Dahua's own ecosystem, it integrates perfectly with DSS Pro and the DMSS mobile client, allowing you to manage, view live feeds, review recordings, and receive alerts directly from your smartphone or tablet (iOS and Android). This flexibility ensures that you can incorporate the camera into your existing setup or build a new, cohesive security solution.
Cybersecurity Protections
Dahua builds in strong cybersecurity protections including encrypted video streams, secure firmware updates, and access controls. This guards against data breaches or unauthorized remote access — a key consideration for business and home networks alike.
More About AcuPick - Smart Video Search with Precision AI
Dahua’s AcuPick technology revolutionises video surveillance by using advanced AI to pinpoint people or vehicles across recorded footage with remarkable speed and accuracy. Instead of scrubbing through hours of video manually, AcuPick enables users to filter footage by specific targets, drastically cutting down search times and boosting operational efficiency. Integrated into a range of Dahua cameras (including TiOC series) and compatible NVRs, AcuPick delivers a seamless and intelligent search experience.
Highlights of AcuPick:
AI-Driven Precision:
AcuPick leverages intelligent algorithms to differentiate between human and vehicle activity, refining search results to what truly matters.
Smart Filtering:
Search footage using key attributes like clothing colour or vehicle type—no need to know the exact time an incident occurred.
Instant Video Recall:
With just a few clicks, users can zero in on critical moments, improving response times and streamlining investigations.
False Alarm Reduction:
By filtering out irrelevant motion, AcuPick helps reduce nuisance alerts, leading to more reliable monitoring.
Flexible Deployment:
Whether through Dahua's smart cameras or NVR integration, AcuPick fits into a wide range of security setups.
Practical Applications:
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Retail & Offices: Track customer flow or monitor for unauthorized access.
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Car Parks & Garages: Instantly retrieve footage of accidents or suspicious activity.
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Public Spaces: Quickly find persons of interest using visual identifiers.
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Residential Estates: Enhance safety by identifying vehicle movements or visitors.
AcuPick transforms surveillance from reactive monitoring to proactive intelligence, saving time while elevating security across the board.
Q&A
Q1: Can this camera record in color at night?
A1: Yes, the camera uses Smart Dual Light technology. It typically records in black and white using infrared (IR) at night. However, when it detects a human or vehicle, its white light illuminators activate, allowing it to record the event in full color.
Q2: How loud is the built-in speaker?
A2: The sound warning volume can be adjusted from 0% to 100%, allowing you to set it to an appropriate level for deterrence or communication in various environments.
Q3: Can the flashing lights and siren be disabled or controlled?
A3: Yes, the Active Deterrence features, including the red-blue lights and sound warnings, can be configured. You can set them to activate based on specific rules, or disable them entirely if not needed.
Q4: Does this camera work with NVRs from other brands?
A4: Yes, the camera supports ONVIF (Profile S, G, & T), CGI, and SDK, which means it's designed to be compatible with a wide range of third-party NVRs and video management systems.
Q5: How much recording can the 512 GB SD card hold?
A5: The recording duration on a 512 GB microSD card depends on factors like resolution, frame rate, compression (Smart H.265+ is very efficient), and the amount of motion detected. For continuous recording, it could be several days to over a week. With Smart Motion Detection (SMD 4.0) and event-triggered recording, it can last much longer.
Q6: What is the main difference between "Auto Tracking" and "Smart Tracking"?
A6: Auto Tracking 3.0 allows the PTZ camera to automatically follow a moving object once triggered (either manually or by a defined rule). Smart Tracking specifically leverages the panoramic camera to guide the detail (PTZ) camera; when a target enters the wide-angle view, the PTZ automatically zooms in and tracks it as it moves, ensuring you capture detailed footage.
Q7: Will the siren or lights activate automatically if someone walks by?
A7: Yes, if you set up Perimeter Protection rules (e.g., tripwire, intrusion detection) and link them to the Active Deterrence feature, the siren and lights can automatically activate when a person or vehicle crosses the defined area.
Q8: Can I remotely view the live feed and recordings on my phone?
A8: Absolutely. The camera supports DMSS and DSS Pro management software, and there are dedicated mobile clients for iOS and Android, allowing you to view live feeds, review recorded footage, and receive alerts from anywhere.
Comparison Table
Dahua Camera Comparison
DH-SDT4E425-8P-GB-APV1 vs. DH-SDT4C425-8P-GB-APV1
| Category |
Newer Model (DH-SDT4E425-8P-GB-APV1) |
Older Model (DH-SDT4C425-8P-GB-APV1) |
| Series |
WizSense X-Spans Series (Newer Generation) |
WizSense X-Spans Series (Previous Generation) |
| Image Sensor |
Panorama: 1/2.7" CMOS; Detail: 1/2.8" STARVIS™ CMOS |
Typically older or slightly different sensor (Specific details not as readily available for '4C' but generally indicates an earlier iteration of similar specifications) |
| Panorama Pixel |
8 MP |
Likely 4 MP or 8 MP (information suggests 4MP+4MP for previous '4C' models in the series, but the exact older version is harder to pinpoint definitively with public data. Assuming a potential upgrade here.) |
| Detail Pixel |
4 MP |
Likely 4 MP (consistent with model numbering) |
| Max. Resolution (Panorama) |
4096(H) × 1860(V) |
Potentially lower or similar (Exact resolution for the '4C' series often aligned with its pixel count, e.g., 4MP). |
| Max. Resolution (Detail) |
2560(H) × 1440(V) |
Likely similar 2560(H) × 1440(V) |
| Optical Zoom |
Detail: 25x optical zoom |
25x optical zoom (typically consistent across this model line with the '425' designation) |
| Min. Illumination (Color) |
Panorama: 0.005 lux@F1.4; Detail: 0.005 lux@F1.6 |
Potentially similar or slightly higher (less sensitive) values. The 'E' series often brings minor improvements in low-light. |
| IR Distance |
Panorama: 30 m; Detail: 100 m |
Likely similar or slightly less for the older model. |
| White Light Distance |
Panorama: 30 m; Detail: 50 m |
Likely similar or slightly less for the older model. |
| Smart Dual Light+ |
Present. Advanced smart algorithm for target detection, switching between IR and white light. |
Likely present, but may be an earlier iteration or lack the '+' enhancements. The '4E' is noted to explicitly support Smart Dual Light+. |
| Auto Tracking |
Auto Tracking 3.0 |
Potentially Auto Tracking 2.0 or earlier. The '3.0' signifies an enhancement. |
| AI Features |
Perimeter Protection, SMD 4.0, Smart Tracking, Active Deterrence (Red-Blue light, 11 sound alarms, 10 custom) |
Perimeter Protection, SMD (earlier version, e.g., 3.0), Smart Tracking, Active Deterrence (Potentially less advanced light/sound options). The '4.0' for SMD is an upgrade. |
| WDR |
Panorama: DWDR; Detail: 120 dB |
Likely similar (DWDR for panorama, 120dB for detail), but consistent performance may vary. |
| EIS (Electronic Image Stabilization) |
Detail: Yes |
Likely present for the detail camera. |
| Storage |
Micro SD card (512 GB) |
Micro SD card (typically 256 GB for older models). This is a notable upgrade. |
| Power Supply |
12 VDC, 3 A ± 10%; PoE (802.3at) |
Likely the same. |
| DORI Distance (Detail - Recognize) |
500 m (1640.42 ft) |
Likely similar, but minor differences due to optical/sensor refinements are possible. |
| Protection |
IP66, TVS 6000 V lightning proof, surge protection, voltage transient protection |
Likely the same. |
Summary Recommendation
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Choose the Newer Model (DH-SDT4E425-8P-GB-APV1) when:
- You require the latest advancements in AI features, specifically **SMD 4.0** and **Auto Tracking 3.0**, for more accurate human/vehicle detection and tracking.
- Enhanced low-light performance is critical, as the '4E' series often incorporates subtle improvements in sensor technology and image processing.
- Increased local storage capacity is beneficial (512 GB Micro SD support vs. likely 256 GB on older models).
- You need the most up-to-date **Smart Dual Light+** technology for optimal full-color monitoring in specific scenarios while minimizing light pollution.
- Investing in future-proof technology and slightly refined overall performance is a priority.
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The Older Model (DH-SDT4C425-8P-GB-APV1) might still be suitable when:
- Budget is a primary concern, and the slight improvements in AI, low-light, and storage are not strictly necessary for your application.
- Your surveillance needs are met by the core panoramic and PTZ functionality, 25x optical zoom, and existing smart features, even if they are an earlier iteration.
- You are replacing an existing '4C' model and prefer to maintain consistency in a deployment where minor feature upgrades are not critical.
