The DH-SDT4E425-4F-GB-A-PV1 X-Spans series camera offers both a wide panoramic view and detailed close-ups from a single unit. It's designed for users who need comprehensive area monitoring alongside the ability to track specific activity. This camera simplifies security system installations by combining the functions of multiple cameras, making it a practical choice for covering large areas efficiently.
Key Features
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Panoramic and Detail Cameras: Provides both a broad overview and the ability to zoom in on specific areas for comprehensive coverage from one device.
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Smart Tracking: Automatically follows moving subjects detected in the panoramic view, ensuring critical events are captured in detail.
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Active Deterrence: Emits red and blue flashing lights along with customizable sirens to proactively warn off intruders.
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Smart Dual Light+: Switches between infrared and bright white light for clear, full-color images even in very low-light conditions when activity is detected.
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Perimeter Protection: Accurately identifies human and vehicle intrusions, significantly reducing false alarms from environmental factors.
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WizSense AI Technology: Leverages AI to focus on human and vehicle detection, improving the accuracy of alerts and streamlining event searches.
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IP66 Weather Protection: Built to withstand harsh outdoor conditions, ensuring reliable operation in rain, dust, and extreme temperatures.
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Flexible Storage Options: Supports local recording on a microSD card up to 512 GB, as well as network storage (NAS, FTP/SFTP) for versatile data management.
Perfect For:
- Large parking lots
- Commercial building entrances
- School campuses
- Warehouse perimeters
- Outdoor sports facilities
- Public squares and parks
Installer Tips
- Mount the camera at a height that allows the panoramic lens to cover the desired wide area while still providing a good angle for the PTZ (detail) camera to track subjects effectively.
- Utilize PoE+ for simplified installation, as it delivers both power and network connectivity through a single Ethernet cable, reducing wiring complexity.
- Consider pairing this camera with a compatible Dahua AI NVR to fully leverage advanced AI features like enhanced search capabilities and unified event management.
- For active deterrence, position the camera where the red/blue lights and audible alerts will be most visible and impactful to potential intruders.
- Before finalizing the installation, test the Smart Tracking functionality with typical scenarios to ensure the detail camera effectively follows targets within the panoramic field of view.
- If using custom sound alarms for active deterrence, prepare the audio files in advance and ensure they are uploaded correctly via the camera's interface.
Downloads
Quick-Read Specs
| Feature |
Specification |
| Resolution |
4MP (Panoramic) + 4MP (Detail) |
| Lens Options |
Panorama: 2.8mm; Detail: 5mm–125mm (25x optical) |
| Night Vision Type |
IR (100m detail), White Light (30m panorama, 50m detail) |
| Deterrence |
Red/Blue strobe + customizable siren |
| AI Features |
SMD4.0, Perimeter Protection, Auto Tracking 3.0 |
| Audio |
Built-in Mic + Speaker |
| Storage |
MicroSD card (up to 512 GB) |
| Power |
12 VDC / PoE+ (802.3at) |
| Weather Rating |
IP66 |
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 Light+
The Smart Dual Light+ feature provides superior night vision by intelligently switching between infrared (IR) and white light illumination. In typical low-light conditions, the camera uses IR for discreet black-and-white monitoring. However, when a human or vehicle target is detected by the AI, the camera seamlessly activates its white light, instantly providing full-color images. This not only offers more detailed visual evidence but also acts as an additional deterrent, making intruders aware they are being recorded in vivid color. Once the target leaves the detection area, the camera reverts to IR, conserving power and maintaining discretion.
WizSense AI and Perimeter Protection
WizSense technology, powered by an independent AI chip and deep learning algorithms, significantly enhances the camera's ability to accurately detect and classify targets. Its Perimeter Protection feature goes beyond basic motion detection by intelligently filtering out common false alarms caused by environmental factors like rustling leaves, animals, or sudden light changes. By focusing specifically on human and vehicle shapes, the system provides highly accurate alerts, ensuring that security personnel are notified only when genuine threats are present, leading to more efficient response times and reduced wasted effort.
Auto Tracking 3.0 and Smart Tracking
The DH-SDT4E425-4F-GB-A-PV1 excels in dynamic surveillance thanks to its Smart Tracking capabilities, incorporating Auto Tracking 3.0. The panoramic camera acts as an intelligent "eye," detecting subjects entering its wide field of view. Upon detection, it seamlessly hands off the target to the high-resolution detail camera. This PTZ (Pan-Tilt-Zoom) camera then automatically rotates, tilts, and zooms to keep the subject precisely in frame, providing continuous, detailed monitoring of their movement. This ensures that even fast-moving subjects are consistently tracked, offering invaluable visual evidence.
Active Deterrence with Lights and Audio
This camera's active deterrence features are designed to prevent incidents before they escalate. When an intelligent event, such as a perimeter intrusion, is detected, the camera can automatically trigger a powerful combination of visual and audible warnings. This includes striking red and blue flashing lights and a loud, customizable siren. Users can choose from 11 pre-loaded sound alarms or even upload their own custom messages or warnings, providing a flexible and impactful way to deter trespassers and notify nearby individuals of potential danger.
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
Q: Can this camera record in color at night?
A: Yes, with its Smart Dual Light+ feature, the camera can switch to full-color recording at night when a human or vehicle is detected within its field of view, thanks to its integrated white light illuminators.
Q: How loud is the built-in speaker for active deterrence?
A: While specific decibel levels are not provided, the built-in speaker is designed to be loud enough to effectively deliver warning messages or sirens as part of the active deterrence function, aiming to be clearly audible to intruders.
Q: Can the red and blue flashing lights be disabled if I only want silent monitoring?
A: Yes, the active deterrence features, including the warning lights and sound alarms, are configurable and can be disabled or set to activate only under specific conditions according to your preference.
Q: Does this camera work with Network Video Recorders (NVRs) from other brands?
A: This camera supports ONVIF (Profile S, G, and T), which means it should have basic compatibility with many third-party NVRs. However, for full functionality, including advanced AI features like Smart Tracking and Perimeter Protection, it is recommended to use a compatible Dahua NVR.
Q: How long can the camera record on a 512 GB microSD card?
A: The recording duration depends on several factors, including the video resolution, compression (Smart H.265+ will extend duration significantly), frame rate, and the amount of motion detected. A 512 GB card can typically store several weeks to a few months of footage with optimized settings and event-triggered recording.
Q: What makes the X-Spans series different from standard PTZ cameras?
A: The X-Spans series combines a fixed panoramic camera with a PTZ (detail) camera in one unit. This allows it to simultaneously provide a wide overview and intelligent, auto-tracking zoom capabilities, which is more efficient and cost-effective than deploying separate cameras.
Q: Will the siren activate automatically, or do I need to trigger it manually?
A: The siren can be configured to activate automatically based on intelligent events such as perimeter intrusion or motion detection, thanks to the active deterrence features. It can also be manually triggered via the management software or mobile app.
Q: Is the camera suitable for extreme weather conditions?
A: Yes, the camera has an IP66 weather rating, making it highly resistant to dust and water ingress. It is also protected against lightning (TVS 6000 V), surges, and voltage transients, ensuring reliable operation in a wide range of outdoor environments from -40 °C to +65 °C.
Comparison Table
Dahua DH-SDT4E425-4F-GB-A-PV1 vs. DH-SD49425XB-HNR
| Category |
Newer Model (DH-SDT4E425-4F-GB-A-PV1) |
Older Model (DH-SD49425XB-HNR) |
| Camera Type |
X-Spans 4MP+4MP 25x TiOC WizSense Network PTZ Camera (Dual-lens: Panorama + Detail PTZ) |
4MP 25x Starlight IR WizSense Network PTZ Camera (Single PTZ lens) |
| Image Sensor |
Panorama: 1/2.8" 4Megapixel F1.0 CMOS; Detail: 1/2.8" 4Megapixel STARVIS™ CMOS |
1/2.8″ STARVIS™ CMOS |
| Max. Resolution |
Panorama: 2560 (H) × 1440 (V); Detail: 2560 (H) × 1440 (V) |
2560 (H) × 1440 (V) |
| Optical Zoom |
Detail: 25x optical zoom |
25x optical zoom |
| Min. Illumination |
Panorama: 0.001 lux@F1.0 (Color), 0.0005 lux@F1.0 (B/W); Detail: 0.005 lux@F1.6 (Color), 0.0005 lux@F1.6 (B/W) |
Color: 0.005Lux@F1.6; B/W: 0.0005Lux@F1.6 |
| Illumination Type & Distance |
Panorama: 30 m IR, 30 m white light; Detail: 100 m IR, 50 m white light (Smart Dual Light +) |
100 m IR illumination |
| AI Features |
WizSense, Auto tracking 3.0, Smart tracking, Perimeter protection, Active deterrence (red-blue light, sound warning), SMD4.0, Quick Pick |
WizSense, Perimeter Protection, SMD PLUS, Face Detection, Smart Capture |
| Audio |
1 channel audio input, 1 channel audio output, built-in speaker, supports importing custom sound alarms |
Not explicitly detailed but typically includes audio support (input/output/mic) for a PTZ of this class. |
| Storage |
Micro SD card (512 GB); FTP/SFTP; NAS |
Micro SD card (likely up to 256GB or 512GB, standard for newer models); FTP/SFTP; NAS |
| DORI Distance (Detail Camera/PTZ) |
Detect: 2500 m; Observe: 987.5 m; Recognize: 500 m; Identify: 250 m |
Detect: 2540 m; Observe: 1016 m; Recognize: 508 m; Identify: 254 m |
| WDR |
120 dB (for Detail camera, Panorama is DWDR) |
120 dB |
| Power Supply |
12 VDC, 3A ± 10%; PoE+ (802.3at) |
12 VDC; PoE+ (802.3at) |
| Ingress Protection |
IP66 |
IP66 |
Summary Recommendation
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Choose the Newer Model (DH-SDT4E425-4F-GB-A-PV1) when:
- You require a comprehensive solution that provides both a wide panoramic overview and detailed PTZ capabilities from a single unit, significantly reducing installation complexity and cost for multi-angle surveillance.
- Enhanced low-light performance in the panoramic view is critical (F1.0 aperture on the panorama lens).
- Advanced active deterrence features with red-blue light and customizable sound warnings are desired.
- The latest generation of AI features, including Auto Tracking 3.0, SMD4.0, and Quick Pick, are a priority for more accurate and efficient threat detection.
- A higher capacity for local storage (up to 512 GB Micro SD) is needed.
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The Older Model (DH-SD49425XB-HNR) might still be suitable when:
- A traditional single-lens PTZ camera is sufficient for your surveillance needs, and the integrated panoramic view is not a critical requirement.
- Budget constraints are a significant factor, as older models are typically more cost-effective.
- Standard AI features like Perimeter Protection, SMD PLUS, and Face Detection are adequate.
- Long-range IR illumination is the primary low-light requirement, without the need for additional white light or dual illumination features.
