Dahua NVR4108-P-EI – 8CH WizSense AI PoE Network Video Recorder (1 HDD, 80 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 NVR4108-P-EI – 8CH WizSense AI PoE Network Video Recorder (1 HDD, 80 Mbps)
The Dahua NVR4108-P-EI is part of Dahua's WizSense EI Series, combining advanced AI analytics, efficient video management, and integrated PoE connectivity in a compact 1U recorder. It is designed for small to medium-sized surveillance installations that require intelligent monitoring and simplified deployment. Supporting up to 8 IP camera channels and up to 80 Mbps incoming, recording, and outgoing bandwidth, the recorder can handle high-resolution surveillance streams from cameras up to 16MP. Its powerful decoding capability ensures smooth live viewing and playback performance across multiple channels. A major advantage of this model is its integrated 4-port PoE switch, allowing compatible IP cameras to be connected and powered directly from the recorder. This reduces installation time, simplifies cabling, and eliminates the need for a separate PoE switch in many applications. The NVR incorporates WizSense AI technology, supporting face detection, face recognition, perimeter protection, and SMD Plus at recorder level. When paired with compatible Dahua AI cameras, it also supports advanced features such as people counting, heat mapping, stereo analysis, ANPR, and human and vehicle classification.
KEY FEATURES
- 8-channel IP video recorder
- Integrated 4-port PoE switch
- Supports IP cameras up to 16MP
- 80 Mbps incoming, recording and outgoing bandwidth
- WizSense AI analytics platform
- Face detection and face recognition
- Perimeter protection analytics
- SMD Plus intelligent motion detection
- Up to 10 face databases and 20,000 face images
- Human and vehicle classification support via compatible cameras
- Smart H.265+ video compression
- HDMI and VGA video outputs
- Up to 4K display resolution
- 1 SATA HDD bay (up to 16 TB)
- ONVIF compatibility
- Mobile and web remote access
- Compact 1U desktop or rack-mount design
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