Dahua NVR5216-16P-EI – 16 Channel WizSense AI Network Video Recorder with 16 PoE Ports
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
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Dahua NVR5216-16P-EI – 16 Channel WizSense AI Network Video Recorder with 16 PoE Ports
The Dahua NVR5216-16P-EI is a high-performance network video recorder from Dahua's WizSense Series, delivering advanced AI functionality and reliable recording capabilities for commercial, industrial, educational, and residential security applications. Supporting up to 16 IP camera channels and equipped with 16 built-in PoE ports, the recorder provides both power and network connectivity directly through the NVR, reducing installation complexity and eliminating the need for additional PoE switches in many deployments. The system supports camera resolutions up to 32MP, ensuring outstanding image clarity for detailed monitoring and forensic investigations. Powered by Dahua's WizSense AI technology, the NVR offers intelligent functions including face detection and recognition, Smart Motion Detection Plus (SMD Plus), perimeter protection, video metadata analysis, licence plate comparison, and AcuPick intelligent video search. These features help security operators quickly locate events, reduce false alarms, and improve overall surveillance efficiency. The recorder supports up to 384 Mbps incoming, recording, and outgoing bandwidth, enabling smooth operation across multiple high-resolution cameras. Its powerful decoding capability supports up to 32 channels of 1080p video at 30fps, ensuring responsive live viewing and playback performance.
KEY FEATURES
- 16-channel IP camera support
- 16 integrated PoE ports with IEEE 802.3af/at support
- Ports 1–8 support ePoE technology
- Supports camera resolutions up to 32MP
- WizSense AI analytics platform
- Face detection and face recognition
- Smart Motion Detection Plus (SMD Plus)
- Perimeter protection with intelligent classification
- AcuPick intelligent video search
- Video metadata analysis
- Licence plate comparison support
- Up to 384 Mbps incoming, recording and outgoing bandwidth
- Decoding capability up to 32 × 1080p @ 30fps
- 8K HDMI video output
- Smart H.265+, H.265, Smart H.264+, H.264 and MJPEG compression
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