DHI-NVR4232-EI is a 32-channel network video recorder from Dahua’s WizSense series, built for large-scale surveillance projects that need both extensive camera capacity and onboard AI intelligence. With two HDD bays and rich alarm connectivity packed into a 1U enclosure, this recorder suits sizable commercial properties, multi-site retail chains, or large residential and mixed-use developments.

The DHI-NVR4232-EI supports IP camera resolutions up to 16MP across 32 channels, with adaptive decoding capability reaching up to 16 channels at 1080p@30fps. Network bandwidth totals 256 Mbps for incoming, recording, and outgoing streams with AI disabled, or 180 Mbps across the board when AI features are active, giving substantial headroom for a fully populated 32-camera deployment.

The standout feature of the DHI-NVR4232-EI is its onboard AI processing. The recorder itself handles 1-channel face detection and recognition, storing up to 10 face databases with 20,000 face images (2.5GB total capacity), along with 2-channel perimeter protection supporting 10 IVS rules per channel, and 4-channel SMD Plus for accurate motion filtering. When paired with compatible Dahua AI cameras, capabilities extend to face detection, face recognition, perimeter protection, SMD, ANPR, people counting, stereo analysis, and heat mapping across all connected channels, each processing up to 8 targets per second.

Face attribute recognition covers gender, age group, glasses, expressions, face masks, and beards, and each stored face profile can include name, gender, birthday, address, and credential details, making the DHI-NVR4232-EI well suited for access control, retail analytics, and identity-aware security at scale. Multi-screen display supports layouts up to 36 channels, giving operators full visibility across a large camera network.

Storage-wise, the DHI-NVR4232-EI includes two SATA HDD interfaces supporting up to 20TB per drive, with disk group functionality for organizing storage across a large deployment. It also adds 4-channel alarm input and 2-channel alarm output for connecting external sensors and triggering physical alarm devices.

Video compression relies on Smart H.265+, H.265, Smart H.264+, H.264, and MJPEG, keeping storage manageable even across 32 channels of AI-enhanced recording. Video output includes simultaneous or heterogeneous HDMI and VGA up to 4K (3840×2160) resolution, and the network port runs on Gigabit Ethernet (10/100/1000 Mbps). Camera compatibility extends beyond ONVIF to include native support for Panasonic, Sony, Hanwha, Axis, Pelco, Arecont, and Canon devices.

Weighing 1.51kg and rated for -10°C to +55°C operation, the DHI-NVR4232-EI is a strong fit for schools, retail chains, hotels, and larger office campuses that need facial recognition, extensive storage, and rich alarm integration across a full 32-camera surveillance system.