NVR / Recorders › NVR508-16B / 32B / 64B
Uniview (UNV)B Series · 8× SATA HDD · 2U Rack
8-HDD Rack-Mount Network Video Recorder · B Series
NVR508-16 / 32 / 64B
16 / 32 / 64-channel 2U rack-mount network video recorder — 8 SATA bays with RAID 1/5, records cameras up to 16MP, Ultra 265 compression, ONVIF certified for third-party IP cameras.
16MP · max recordingRAID 1/5 · 8-bay protected storageUltra 265 · low storage4K HDMI · + VGA independentONVIF · certified38 languages · local interface
Choose your size — three models on this page
Rule of thumb: count your cameras, then leave room to grow — the 16B suits a single building; step up to the 32B or 64B for campus or multi-building sites that need RAID-protected storage. Highlighted rows in the spec table below show every difference between the three.
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How many terabytes for your channels and days? Use the storage calculator →
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The Uniview NVR508-B Series is an 8-bay 2U rack-mount network video recorder offered in three sizes: NVR508-16B (16-ch), NVR508-32B (32-ch) and NVR508-64B (64-ch). All three record cameras up to 16MP with Ultra 265 / H.265 / H.264 compression, support RAID 1/5 across up to 8 SATA bays (24 TB each), and output VGA/HDMI independently, with the 64B model outputting both simultaneously by default. The recorder carries ONVIF certification and provides a 38-language local interface.
Is this the right recorder for you?
Plain-language guide for buyers and installers — based only on what this recorder actually does.
Multi-building & campus sites64 channels and 8 HDD bays cover a large site from one recorder — fewer boxes to manage across buildings.
Growing deploymentsBuy channels ahead: the 32B/64B lets you add cameras later without swapping the recorder.
Mission-critical footageRAID 1/5 across the 8 bays plus N+1 hot spare protects recordings if a disk fails — footage survives a single drive failure.
Unreliable network linksANR technology keeps recording locally when the network drops, then backfills the gap once the connection is restored.
Investigation & retrievalFace, vehicle (LPR), human body and heat-map search narrow hours of multi-channel footage down to the right clip.
Mixed-brand projectsONVIF certification means existing third-party IP cameras are more likely to keep working — no need to replace the whole site.
Multi-language deployments38 GUI languages including Spanish (Latin America), Portuguese (Brazil) and French — your customer operates it in their own language.
Not the right pick if you need…
- PoE ports — cameras need a separate PoE switch (we bundle one at combo price)
- Hot-swap drive trays — the manual doesn't describe hot-swap bays; the 8 SATA drives mount inside the chassis
- A redundant/dual power supply — Power Supply is a single AC 100–240V input, not described as dual
- RAID 6 or RAID 10 — Disk Array Type supports only RAID 1 and RAID 5
- RS232 serial control — this series has no RS232 port (RS485 only)
Worried about counterfeits? Order under your own company name.
1 · Company name2 · Corporate bank payment3 · Order registered in your name4 · Verify SN on Uniview's site
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Key Features
Complete list from the official datasheet.
Support Ultra 265 / H.265 / H.264 video formats
16 / 32 / 64-channel input
VGA and HDMI independent output (NVR508-64B simultaneous output by default, independent output configurable)
Up to 16 Megapixels resolution recording
Support N+1 Hot spare
ANR technology to enhance the storage reliability when the network is disconnected
Support cloud upgrade
RAID-protected storage. Investigation-ready search.
Two real capabilities from the datasheet that matter on large sites: disk-failure protection and fast multi-channel search.
RAID 1/5 STORAGE
Protected against drive failure
8 SATA bays (up to 24 TB each) support RAID 1 and RAID 5 with N+1 hot spare — if one disk fails, recordings on the array keep working instead of disappearing with the drive.
SMART SEARCH
Find the moment across 64 channels
Face, vehicle (LPR), human body and general VCA search plus Heat Map and People Counting turn hours of multi-channel footage into the exact clip you need.
Which size fits your project?
Bars show camera capacity per model. Click the model buttons above to switch — the spec table highlights every other difference.
NVR508-16Blive view split up to 16 · sync playback 16-ch
16cameras
NVR508-32Blive view split up to 36 · sync playback 16-ch
32cameras
NVR508-64Blive view split up to 64 (simultaneous mode) · sync playback 16-ch
64cameras
Who uses it, where it goes and how to size it
Written for the NVR508-16B, 32B and 64B from the official datasheet: 16, 32 or 64 IP channels, 320 Mbps incoming, 8 SATA bays up to 24 TB each with RAID 1/5 and N+1 hot spare, recording up to 16 MP, 2U case on AC 100–240 V, no built-in PoE.
Which size suits which installation
- NVR508-16B: sites that must keep footage for months — Only 16 channels but 8 disk bays: 16 cameras get up to 20 Mbps each, and eight 24 TB disks in RAID 5 hold about 243.1 days at 4 Mbps per camera. Choose it when retention and disk protection matter more than camera count.
- NVR508-32B: factories, schools and multi-building sites — 32 cameras at up to 10 Mbps each, enough for 4K on H.265; the live view goes up to 36 tiles on one screen and the corridor layouts suit tall, narrow corridor and aisle views.
- NVR508-64B: campuses with many 2–4 MP cameras — 64 channels share 320 Mbps, which is 5 Mbps per camera when all are used. With eight disks it still keeps about 60.8 days for 64 cameras at 4 Mbps in RAID 5, and its VGA and HDMI can show the same 64-tile wall at the same time.
- Projects where the cameras do the analytics — The B series has no analytics of its own: it stores and searches face, vehicle (LPR), SIP and UMD events from Uniview smart cameras on all channels, up to 8 images per second in total. If you want the recorder to analyze ordinary cameras, look at the NVR508-32E-IQ / 64E-IQ.
Where and how to install the recorder
- 19-inch rack, 2U — The 16B measures 442 × 431.4 × 88.6 mm and the 32B/64B 442 × 426 × 89 mm, up to 5.5 kg before disks. Use the FL-2U rack mount in a locked rack, or a fixed shelf; with eight disks fitted it gets heavy, so support it properly rather than hanging it on the front ears only.
- Eight disks need airflow — Eight running drives produce real heat. The recorder works from -10 °C to 55 °C, but 24 TB disks require a room at or below 40 °C. Keep the vents clear, leave space above and below in the rack, and prefer an air-conditioned equipment room to a closed cabinet in a hot corridor.
- Mains power, power switch and UPS — Single AC 100–240 V supply with a power switch, up to 25 W without disks; each drive adds its own load. Put it on a UPS together with the PoE switches, and always shut down from the menu before opening the case: the disks mount inside the chassis and are not hot-swap.
- Cameras through PoE switches — There are no PoE ports. Cameras go to PoE switches (each copper run within 100 m) and the switches uplink to the recorder's gigabit RJ45 ports; there are two of them. Keep the total camera bitrate under 320 Mbps.
- Plan the array before recording — Fit identical 3.5-inch SATA surveillance-grade drives and build RAID 5 (or RAID 1 for pairs) before the cameras start recording, because creating an array erases the disks. Assign one disk as a hot spare disk if you cannot get to site quickly when a drive fails.
Planning table: channels, bandwidth, disks and retention
All three share the 2U case, 320 Mbps input, eight SATA bays with RAID 1/5 and hot spare, and the same top decoding (2 × 16 MP or 4 × 4K at 30 fps on H.265). What changes is the channel count, the bandwidth each camera gets when every channel is used, the largest split screen and the retention of eight disks.
| NVR508-16B | NVR508-32B | NVR508-64B | |
|---|---|---|---|
| IP camera channels | 16 | 32 | 64 |
| Incoming / outgoing bandwidth | 320 / 160 Mbps | 320 / 160 Mbps | 320 / 160 Mbps |
| Bandwidth per camera, all channels used | 20 Mbps | 10 Mbps | 5 Mbps |
| Hard disks | 8 × SATA, ≤ 24 TB each (192 TB) | 8 × SATA, ≤ 24 TB each (192 TB) | 8 × SATA, ≤ 24 TB each (192 TB) |
| RAID / usable in RAID 5 (8 × 24 TB; with 1 hot spare) | 1, 5 / 168 TB; 144 TB | 1, 5 / 168 TB; 144 TB | 1, 5 / 168 TB; 144 TB |
| Decoding H.265 (what each size adds) | 2×16MP, 4×4K, 8×4MP, 16×1080P @30 | + 32×960P @25 | + 36×720P @30, 64×D1 |
| Largest split screen | 16 | 36 | 64 (VGA + HDMI simultaneous) |
| Days on 8 × 24 TB (192 TB), all channels at 4 Mbps | 277.8 | 138.9 | 69.4 |
| Days in RAID 5 (168 TB usable), all channels at 4 Mbps | 243.1 | 121.5 | 60.8 |
- Pick the 16B for up to 16 cameras when you need long retention or RAID 5 with a hot spare; each camera can use up to 20 Mbps, so 4K and 16 MP cameras are fine.
- Pick the 32B for 17–32 cameras; 4K cameras at 8 Mbps fit up to 40 in 320 Mbps, so all 32 channels can be 4K.
- Pick the 64B for 33–64 cameras of 2–4 MP at 5 Mbps or less each; for recorder-side face or intrusion analysis choose the NVR508-64E-IQ instead.
Retention assumes continuous 24-hour recording at 4 Mbps per camera (a typical H.265 main stream for a 4 MP camera): days = TB × 10^12 ÷ (cameras × 4,000,000 ÷ 8 × 86,400). RAID 5 on eight equal disks gives seven disks of usable space (168 TB); with one disk kept as N+1 hot spare, six (144 TB, about 14% fewer days). Event recording, lower frame rates and Ultra 265 give more days; 24 TB disks require a room at or below 40 °C.
Full Specifications
Complete official specifications from the manufacturer's datasheet (technical values in English).
Highlighted rows differ between the three models:NVR508-16B · 16-chNVR508-32B · 32-chNVR508-64B · 64-ch
Decoding
| Decoding Format | Ultra 265, H.265, H.264 |
| Decoding Capability | 16B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30, 10×3MP@30, 16×1080P@30 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30, 14×1080P@30, 16×960P@3032B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30, 10×3MP@30, 16×1080P@30, 32×960P@25 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30, 14×1080P@30, 28×960P@25, 30×720P@30, 32×D164B · Ultra 265/H.265: 2×16MP@30, 2×12MP@30, 4×4K@30, 6×5MP@30, 8×4MP@30, 10×3MP@30, 16×1080P@30, 32×960P@25, 36×720P@30, 64×D1 | H.264: 2×16MP(4800×2688)@30, 2×12MP@30, 2×4K@30, 4×5MP@30, 6×4MP@30, 8×3MP@30, 14×1080P@30, 28×960P@25, 30×720P@30, 64×D1 |
| Decoding Capability Description | The resolution of each channel cannot exceed 8192 pixels in length and 4096 pixels in width. For VGA/HDMI independent output, the VGA live video is output by default. To output the highest resolution video from the HDMI port, please clear the VGA video on the preview page. |
| Audio Compression | G.711A, G.711U |
Network
| Incoming Bandwidth | 320 Mbps |
| Outgoing Bandwidth | 160 Mbps |
| Remote Users | 128 |
| Protocols | TCP/IP, P2P, UPnP, NTP, DHCP, PPPoE, HTTP, HTTPS, DNS, DDNS, SNMP, SMTP, RTSP, 802.1x, IPv6, IPv4 |
| Browser (Plugin) | IE10, IE11, Chrome 45+, Edge 79+, Firefox 52+ |
Video/Audio Input
| IP Video Input | 16B · 16-ch32B · 32-ch64B · 64-ch |
| RCA Audio Input | 1-ch |
Video/Audio Output
| HDMI Output | 4K (3840×2160)/30 Hz, 1920×1080/60 Hz, 1920×1080/50 Hz, 1600×1200/60 Hz, 1280×1024/60 Hz, 1280×720/60 Hz, 1024×768/60 Hz |
| VGA Output | 1920×1080/60 Hz, 1920×1080/50 Hz, 1600×1200/60 Hz, 1280×1024/60 Hz, 1280×720/60 Hz, 1024×768/60 Hz |
| RCA Audio Output | 1-ch |
| Liveview Display | 16B · 1/4/6/8/9/1632B · 1/4/6/8/9/16/25/3664B · Simultaneous Output — VGA: 1/4/6/8/9/16/25/36/64, HDMI: 1/4/6/8/9/16/25/36/64; Independent Output — VGA: 1/4/6/8/9/16/25/32, HDMI: 1/4/6/8/9/16/25/32 |
| Corridor Mode Screen | 16B · 3/4/5/7/9/10/12/1632B · 3/4/5/7/9/10/12/16/3264B · 3/4/5/7/9/10/12/16/32 |
Two-way Audio
| Two-way Audio | 1-ch, RCA (Using the audio input and output) |
Snapshot
| FTP/Schedule/Event Snapshot | 4-ch snapshot (max. 8 MP (3840×2160) video resolution, with 1080P snapshot resolution) |
Recording
| Recording Resolution | 16 MP / 12 MP / 8 MP / 6 MP / 5 MP / 4 MP / 3 MP / 1080P / 960P / 720P / D1 / 2CIF / CIF |
| Synchronous Playback in Local | 16-ch |
Smart Function
| Smart by IPC | All channels (up to 8 images/s in total): Face Detection, Face Comparison, Vehicle Detection (LPR), Temperature Detection, SIP, UMD, Video Metadata, Traffic Monitoring |
| VCA Search | Face Snapshot Search, Face Comparison Search, Motor Vehicle Search, Non-Motor Vehicle Search, Human Body Search, General Search, People Counting Report, Heat Map |
Alarm
| General Alarm | Defocus Detection, Scene Change Detection, Object Left Behind, Object Removed, Auto Tracking, Motion Detection, Tampering, Human Body Detection, Video Loss, Alarm Input, Audio Detection |
| Alert Alarm | IP Conflict, Network Disconnected, Disk Offline, Disk Abnormal, Illegal Access, Hard Disk Space Low, Hard Disk Full, Recording/Snapshot Abnormal |
GUI Language
| GUI Language | 38 languages: Simplified Chinese, Traditional Chinese, English, Vietnamese, Thai, Turkish, Spanish (Latin America), Portuguese (Brazil), Spanish, Portuguese, French, German, Italian, Dutch, Polish, Czech, Hungarian, Slovak, Russian, Hebrew, Arabic, Ukrainian, Estonian, Bulgarian, Greek, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian, Slovenia, Serbia, Korean, Japanese, Latvian, Lithuanian, Persian |
Hard Disk
| SATA | 8 SATA Interfaces |
| Capacity | Up to 24 TB for each HDD (the maximum HDD capacity varies with environment temperature and hard disk size; the environment temperature for use should not exceed 40 °C) |
| Disk Group | Support |
| Redundant Storage | Support |
| Disk Array Type | RAID 1, 5 |
External Interface
| Network Interface | 2 RJ45 10 M/100 M/1000 M self-adaptive Ethernet Interfaces |
| USB | Front panel: 2 × USB 2.0, Rear panel: 1 × USB 3.0 |
| RS485 | 1 |
| RS232 | N/A |
| Alarm In | 16-ch |
| Alarm Out | 4-ch |
| Power Supply | AC 100 to 240 V |
| Power Switch | Support |
Working Environment
| Working Temperature | -10 °C to 55 °C (14 °F to 131 °F) |
| Working Humidity | ≤ 90% RH (non-condensing) |
| Power Consumption (without HDD) | ≤ 25 W |
Dimensions
| Weight (without HDD) | ≤ 5.5 kg (12.13 lb) |
| Dimensions | 16B · 442 mm × 431.4 mm × 88.6 mm (17.4" × 17.0" × 3.5")32B · 442 mm × 426 mm × 89 mm (17.4" × 16.8" × 3.5")64B · 442 mm × 426 mm × 89 mm (17.4" × 16.8" × 3.5") |
Certification
| Certification | CE; FCC; UL; RoHS; WEEE |
| CE | EN 55032, EN 61000-3-3, EN IEC 61000-3-2, EN 55035 |
| FCC | Part15 Subpart B |
Dimensions
Engineering drawing reproduced 1:1 from the official datasheet.
unit: mm (in.) — drawing shown is the NVR508-16B chassis
| Dimensions (NVR508-16B) | 442 × 431.4 × 88.6 mm (17.4" × 17.0" × 3.5") |
| Dimensions (NVR508-32B / 64B) | 442 × 426 × 89 mm (17.4" × 16.8" × 3.5") |
| Weight (without HDD) | ≤ 5.5 kg (12.13 lb) |
| Power supply | AC 100 to 240 V |
| Consumption (without HDD) | ≤ 25 W |
Rear panel — all interfaces
Optional Mounting Accessories
Order together with the camera to save shipping.
FL-2U4-HDD & 8-HDD 2U NVR rack mount tray
16/32/64-Channel 8-HDD NVR FAQ — NVR508-B
How many IP cameras can I connect to the NVR508-B series?
The NVR508-16B takes 16 IP cameras, the 32B takes 32 and the 64B takes 64. Incoming bandwidth is 320 Mbps shared across channels, each channel records at up to 16 MP, and the unit plays back 16 channels synchronously on the local monitor.
Does the NVR508-B have built-in PoE ports?
No. This series has no PoE ports — it is a rack-mount recorder with two gigabit RJ45 network interfaces. Power the cameras from separate PoE switches in the field and bring the streams back to the NVR over the LAN, the standard layout for 16 to 64 camera projects.
How many hard drives fit, and what is the maximum capacity?
There are 8 SATA bays, each accepting a surveillance hard drive up to 24 TB — 192 TB in one chassis. RAID 1 and RAID 5 with N+1 hot spare keep recordings available if a disk fails, and disk group plus redundant storage are supported.
Does it work with third-party ONVIF cameras?
Yes. The recorder is ONVIF certified, so third-party IP cameras that follow the ONVIF standard can be added alongside Uniview ones. RTSP is also available for direct stream pull, and the local interface offers 38 GUI languages including Latin American Spanish.
How much storage does H.265 save compared with H.264?
The unit decodes Ultra 265, H.265 and H.264. At the same resolution and frame rate, H.265-family encoding produces a clearly lower bitrate than H.264, so the same 8 drives hold more days of footage. Actual savings depend on scene activity, so size storage from your per-stream bitrates.
Can I monitor the system remotely?
Yes. The recorder supports P2P, HTTP/HTTPS and DDNS, and up to 128 remote users can connect at the same time. From a browser you can use Chrome 45+, Edge 79+, Firefox 52+ or IE10/11, and outgoing bandwidth for remote streams is 160 Mbps.
How many 4K cameras can the NVR508-64B record and display?
Recording is limited by the 320 Mbps input: at a typical 8 Mbps per 4K camera that is 40 cameras, or all 64 channels if each 4K camera is set to 5 Mbps or less. Live view and playback at full resolution are limited by decoding: 4 × 4K@30 on H.265 and only 2 × 4K@30 on H.264, so set the cameras to H.265 or Ultra 265 and let large split screens use sub-streams. The maximum recording resolution is 16 MP.
With eight 24 TB drives in RAID 5 plus a hot spare, how much space and how many days do I get on the NVR508-B?
With one disk as hot spare, seven disks form the RAID 5 array and one disk's worth goes to parity, leaving about 144 TB usable (168 TB without the spare). At 4 Mbps per camera, continuous, 144 TB keeps about 208.3 days for 16 cameras, 104.2 days for 32 and 52.1 days for 64. If a disk fails, the spare (which must be at least as large as the array disks) takes its place and the array rebuilds automatically, so footage survives one failure while you order a replacement. The datasheet's 'N+1 hot spare' goes one step further: a standby recorder can take over recording for a failed working recorder.
Does the NVR508-B do face recognition or intrusion detection by itself?
No. The datasheet lists only 'Smart by IPC': face detection and comparison, vehicle detection (LPR), temperature detection, SIP and UMD are done by Uniview smart cameras and received on all channels, up to 8 images per second in total. The recorder then searches those results (face, motor vehicle, non-motor vehicle, human body, people counting report, heat map). For analysis by the recorder itself on ordinary cameras, choose the NVR508-32E-IQ / 64E-IQ.
Why does the HDMI monitor on my NVR508-B not show the highest resolution?
In independent output mode the decoder serves the VGA live view first. The datasheet says: to output the highest resolution video from HDMI, clear the VGA video on the preview page. HDMI goes up to 4K (3840 × 2160) at 30 Hz and VGA up to 1920 × 1080; on the 64B, VGA and HDMI show the same picture by default (simultaneous mode), and independent output can be switched on in the menu.
Can I connect alarm sensors and sirens to the NVR508-B?
Yes: it has 16 alarm inputs and 4 alarm outputs, so door contacts, PIR detectors or panic buttons can trigger recording, pop-up video and outputs to a siren or light (use a relay for mains loads). There is one RS485 port but no RS232. It also raises system alerts such as Disk Offline, Disk Abnormal, Hard Disk Full and Network Disconnected, which can be sent by e-mail through SMTP.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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