Dahua NVR5416-EI – 16 Channel WizSense AI Network Video Recorder (1.5U, 4 HDD Bays)
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 NVR5416-EI – 16 Channel WizSense AI Network Video Recorder (1.5U, 4 HDD Bays)
The Dahua NVR5416-EI is part of Dahua’s WizSense 5-EI series, built to deliver intelligent video surveillance with strong AI capability, stable performance, and flexible storage options for professional installations. It supports up to 16 IP camera channels with resolutions up to 32MP, making it suitable for commercial buildings, retail stores, offices, schools, warehouses, and residential complexes. The recorder provides up to 384 Mbps incoming, recording, and outgoing bandwidth, ensuring smooth handling of multiple high-resolution streams without performance degradation. Powered by Dahua’s WizSense AI by Recorder and AI by Camera architecture, the system delivers smart analytics such as:
- Face detection and face recognition (by recorder)
- Smart Motion Detection Plus (SMD Plus)
- Perimeter protection (IVS rules)
- Video metadata analysis (via AI cameras)
KEY FEATURES
- WizSense AI platform (AI by Recorder + AI by Camera)
- Supports up to 32MP resolution cameras
- 16 IP camera channels
- N+M cluster redundancy support
- iSCSI storage expansion
- 4 × SATA HDD bays
- Smart H.265+, H.265, H.264 compression
- 32 × 1080p decoding capability
- Up to 384 Mbps bandwidth
- ANPR support (via compatible AI cameras)
- Video metadata analysis
- AcuPick intelligent video search
- Perimeter protection (IVS)
- Smart Motion Detection Plus (SMD Plus)
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