Dahua NVR4116-EI – 16CH WizSense AI Network Video Recorder (2 HDD, 256 Mbps)
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 NVR4116-EI – 16CH WizSense AI Network Video Recorder (2 HDD, 256 Mbps)
The Dahua NVR4116-EI belongs to the WizSense EI Series and is engineered for advanced IP surveillance systems that require higher channel capacity, strong AI processing, and flexible storage expansion. It supports up to 16 IP camera channels and can handle cameras with resolutions up to 16MP. With a total incoming, recording, and outgoing bandwidth of up to 256 Mbps, the recorder ensures smooth performance even in multi-camera high-definition deployments. The NVR integrates Dahua’s WizSense AI engine, providing intelligent video analytics such as face detection, face recognition, perimeter protection, and SMD Plus. These functions significantly improve security accuracy by focusing on real human and vehicle targets while reducing false alarms. Face recognition supports up to 10 face databases containing a total of 20,000 face images, enabling fast identification and efficient forensic search capabilities across recorded footage. When used with compatible Dahua AI cameras, the system extends functionality to include human and vehicle classification, people counting, heat mapping, ANPR, and stereo analysis, providing a comprehensive intelligent surveillance solution. SMD Plus enhances motion detection accuracy by filtering out irrelevant triggers such as rain, shadows, foliage movement, and lighting changes, ensuring more reliable alarm events.
KEY FEATURES
- 16-channel IP video recording
- Up to 40 TB total storage capacity
- Dual SATA HDD support
- Up to 4K display resolution
- HDMI and VGA video outputs
- Smart H.265+ compression
- ANPR, people counting, heat map support (via AI cameras)
- Human and vehicle classification support
- Up to 10 face databases / 20,000 face images
- SMD Plus intelligent motion detection
- Perimeter protection analytics
- Face detection and face recognition
- WizSense AI analytics platform
- Up to 256 Mbps incoming bandwidth
- Supports cameras up to 16MP
- 16-channel IP video recording
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