DHI-NVR4232-4KS3 is a 32-channel network video recorder built for larger surveillance deployments that need substantial camera capacity alongside AI-powered analytics. Featuring two HDD bays and rich alarm connectivity in a compact 1U enclosure, this recorder is well suited for medium to large commercial properties, multi-site retail operations, or expansive residential complexes.
The DHI-NVR4232-4KS3 supports IP camera resolutions up to 12MP across a full 32 channels, with network bandwidth reaching 160 Mbps incoming, 128 Mbps recording, and 60 Mbps outgoing when AI is disabled, or 80/80/60 Mbps with AI features active. This gives installers the flexibility to scale a large camera network while balancing performance against analytics needs.
Built-in AI capability adds real value to the DHI-NVR4232-4KS3. Beyond onboard SMD (Smart Motion Detection), the recorder supports camera-based face detection with attribute recognition covering gender, age group, glasses, expressions, and face masks, plus face recognition across all channels at up to 6 targets per second. Perimeter protection extends across 6 channels, and the system also handles people counting, stereo analysis, and heat mapping when paired with compatible AI cameras.
SMD Plus adds a further layer of accuracy, running secondary filtering across 2 channels on the recorder and up to 12 targets per second by camera, reducing false alerts triggered by leaves, rain, or shifting light. Decoding capability reaches up to 8 channels at 1080p@30fps, with flexible multi-screen display layouts of up to 36 channels when AI is disabled.
Storage-wise, the DHI-NVR4232-4KS3 includes two SATA HDD interfaces supporting up to 20TB per drive, along with disk group functionality for organizing storage across a large camera network. It also adds 4-channel alarm input and 2-channel alarm output, giving integrators flexibility for connecting external sensors and triggering physical alarm devices.
Video compression relies on Smart H.265+, H.265, Smart H.264+, and H.264, helping manage storage efficiently across 32 channels of recording. Video output includes simultaneous or heterogeneous HDMI and VGA up to 4K (3840×2160) resolution. Camera compatibility extends beyond ONVIF to include native support for Panasonic, Sony, Axis, Arecont, Pelco, Canon, and Hanwha devices.
Weighing 1.49kg and rated for -10°C to +55°C operation, the DHI-NVR4232-4KS3 is a strong choice for growing organizations that need a large-scale, AI-ready camera network without stepping up to a rack-mounted enterprise recorder.
DHI-NVR4232-4KS3 System
| Feature | Specification |
| Main Processor | Industrial-grade processor |
| Operating System | Embedded Linux |
| Operating Interface | Web, Local GUI |
DHI-NVR4232-4KS3 AI & Analytics
| Feature | Specification |
| AI by Recorder | SMD |
| AI by Camera | Face detection; face recognition; perimeter protection; SMD; people counting; stereo analysis; heat map |
| Perimeter Protection (Camera AI) | 6 channels |
| Face Detection Attributes | Gender; age group; glasses; expressions; face mask; beard |
| Face Detection Performance (Camera AI) | All channels (6 targets/s) |
| Face Recognition Performance (Camera AI) | All channels (6 targets/s) |
| SMD Plus by Recorder | 2 channels: Secondary filtering for human and motor vehicle, reducing false alarms caused by leaves, rain and lighting condition change |
| SMD by Camera | All channels (12 targets/s) |
DHI-NVR4232-4KS3 Audio and Video
| Feature | Specification |
| Access Channel | 32 channels |
| Network Bandwidth |
AI disabled: 160 Mbps incoming, 128 Mbps recording and 60 Mbps outgoing
AI enabled: 80 Mbps incoming, 80 Mbps recording and 60 Mbps outgoing
|
| Resolution | 12 MP; 8 MP; 6 MP; 5 MP; 4 MP; 3 MP; 1080p; 720p; 960p; D1; CIF; QCIF |
| Decoding Capability (AI Disabled) | 1-channel 12 MP@30 fps; 2-channel 8 MP@30 fps; 2-channel 6 MP@30 fps; 3-channel 5 MP@30 fps; 4-channel 4 MP@30 fps; 8-channel 1080p@30 fps |
| Decoding Capability (AI Enabled) | 1-channel 12 MP@30 fps; 1-channel 8 MP@30 fps; 2-channel 6 MP@30 fps; 2-channel 5 MP@30 fps; 3-channel 4 MP@30 fps; 7-channel 1080p@30 fps |
| Video Output |
1 HDMI, 1 VGA
• Simultaneous:
HDMI: 3840 × 2160, 1920 × 1080, 1280 × 1024, 1280 × 720
VGA: 1920 × 1080, 1280 × 1024, 1280 × 720
• Heterogeneous:
HDMI: 1920 × 1080, 1280 × 1024, 1280 × 720
VGA: 1920 × 1080, 1280 × 1024, 1280 × 720
|
| Multi-screen Display |
AI disabled:
Main Screen: 1/4/8/9/16/25/36, Sub Screen: 1/4/8/9/16
AI enabled:
Main Screen: 1/4/8/9/16, Sub Screen: 1/4/8/9/16
|
| Third-party Camera Access | ONVIF; Panasonic; Sony; Axis; Arecont; Pelco; Canon; Hanwha |
DHI-NVR4232-4KS3 Compression Standard
| Feature | Specification |
| Video Compression | Smart H.265+; H.265; Smart H.264+; H.264 |
| Audio Compression | G.711a; G.711u; PCM; G726 |
DHI-NVR4232-4KS3 Network
| Feature | Specification |
| Network Protocol | HTTP; HTTPS; TCP/IP; IPv4; IPv6; RTSP; UDP; NTP; DHCP; DNS; SMTP; UPnP; IP Filter; FTP; DDNS; SNMP; Alarm Server; P2P; Auto Registration; IP Search (Supports IP camera, DVR, NVS, etc.) |
| Mobile Phone Access | iOS; Android |
| Interoperability | ONVIF 24.12 (Profile T; Profile S; Profile G); CGI; SDK |
| Browser | Chrome; IE; Safari; Edge; Firefox |
DHI-NVR4232-4KS3 Recording Playback & Storage
| Feature | Specification |
| Multi-channel Playback | Up to 16 channels |
| Record Mode | General, motion detection; intelligent; alarm |
| Backup Method | USB device and network |
| Playback Mode | Instant playback, general playback, event playback, tag playback, smart playback |
| Disk Group | Yes |
DHI-NVR4232-4KS3 Alarm
| Feature | Specification |
| General Alarm | Motion detection; privacy masking; video loss; scene changing; PIR alarm; IPC external alarm |
| Anomaly Alarm | Error (no disk; disk error; low space; low quota space; network disconnection; IP conflict; MAC conflict); video loss; video tampering; camera offline; audio detection |
| Intelligent Alarm | Face detection; face recognition; perimeter protection; SMD Plus; people counting; stereo analysis; heat map |
| Alarm Linkage | Record; snapshot; IPC external alarm output; audio; buzzer; log; preset; email |
DHI-NVR4232-4KS3 Port & Interfaces
| Feature | Specification |
| Audio Input | 1-channel RCA |
| Audio Output | 1-channel RCA |
| Alarm Input | 4 channels |
| Alarm Output | 2 channels (1-channel 12 V 1 A output) |
| Disk Interface | 2 SATA ports. Each disk can contain up to 20 TB (limit varies depending on the environment temperature) |
| USB | 2 (1 front USB 2.0 port, 1 rear USB 2.0 port) |
| HDMI | 1 |
| VGA | 1 |
| Network Port | 1 (10/100/1000 Mbps Ethernet port, RJ-45) |
DHI-NVR4232-4KS3 General Specifications
| Feature | Specification |
| Power Supply | 12 VDC, 4 A |
| Power Consumption | Total output of NVR is <10 W (without HDD) |
| Net Weight | 1.49 kg (3.28 lb) |
| Gross Weight | 2.77 kg (6.11 lb) |
| Product Dimensions | 375.0 mm × 282.9 mm × 53.0 mm (14.76″ × 11.14″ × 2.09″) (W × D × H) |
| Packaging Dimensions | 433.0 mm × 141.0 mm × 366.0 mm (17.05″ × 5.55″ × 14.41″) (W × D × H) |
| Operating Temperature | –10 °C to +55 °C (+14 °F to +131 °F) |
| Storage Temperature | –20 °C to +60 °C (–4 °F to +140 °F) |
| Operating Humidity | 10%–93% (RH), non-condensing |
| Certifications |
CE-EMC: EN 55032:2015+A1:2020; EN IEC 61000-3-2:2019+A1:2021; EN 61000-3-3:2013+A1:2019+A2:2021; EN 55035:2017+A11:2020; EN 50130-4:2011+A1:2014
CE-LVD: EN 62368-1:2014
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