Dahua NVR4432-16P-EI – 32CH WizSense AI PoE Network Video Recorder (4 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 NVR4432-16P-EI – 32CH WizSense AI PoE Network Video Recorder (4 HDD, 256 Mbps)
The Dahua NVR4432-16P-EI is part of the WizSense EI Series and is engineered for high-density professional IP surveillance systems requiring advanced AI processing, large storage capacity, and simplified PoE deployment. It supports up to 32 IP camera channels, making it suitable for large-scale environments such as industrial sites, corporate campuses, logistics centres, retail chains, and government facilities. The recorder delivers up to 256 Mbps incoming, recording, and outgoing bandwidth (AI mode dependent reduction applies), enabling smooth handling of multiple high-resolution video streams, including cameras up to 16MP. A key feature of this model is its integrated 16-port PoE switch, allowing up to 16 cameras to be powered and connected directly to the recorder, while additional cameras can be connected via external PoE switches or network infrastructure. The system integrates Dahua WizSense AI technology, providing intelligent analytics such as face detection, face recognition, perimeter protection, and SMD Plus. These functions significantly improve detection accuracy by focusing on human and vehicle targets while reducing false alarms caused by environmental movement. Face recognition supports up to 10 face databases containing up to 20,000 face images, enabling fast identification, blacklist/whitelist matching, and efficient forensic search
KEY FEATURES
- 32-channel IP video recording
- Integrated 16-port PoE switch
- Up to 256 Mbps bandwidth (AI dependent mode)
- Supports IP cameras up to 16MP
- WizSense AI analytics platform
- Face detection and face recognition
- Perimeter protection (intrusion & tripwire detection)
- SMD Plus intelligent motion detection
- Up to 10 face databases / 20,000 face images
- Human and vehicle classification support
- ANPR, people counting, heat map support (via AI cameras)
- Smart H.265+ compression
- HDMI & VGA output (up to 4K)
- 4 SATA HDD bays for high storage capacity
- Up to 80 TB total storage
- ONVIF compatibility
- Embedded Linux operating system
- Professional 1U rack design with 16-port PoE
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