Hikvision DS-2CD2186G2H-ISU 8 MP Fixed Dome, DarkFighter, AcuSense, 2.8mm

Introduction to the Hikvision DS-2CD2186G2H-ISU and its key features

The Hikvision DS-2CD2186G2H-ISU is an 8 MP fixed dome IP camera designed for demanding surveillance applications that require sharp 4K imagery, strong low-light performance and intelligent analytics. Branded as an 8MP DarkFighter Dome (2.8mm), this model pairs Hikvision's DarkFighter ultra low-light imaging with AcuSense deep-learning algorithms to deliver clear daytime detail, colour images in very low illumination and reduced false alarms through human/vehicle classification. The -ISU suffix indicates integrated audio (built-in microphone) and on-board storage support, making the unit a versatile choice for indoor and outdoor deployments alike.

Detailed description of specifications and benefits

At the heart of the DS-2CD2186G2H-ISU is a 1/1.8" progressive-scan CMOS sensor that supports a maximum resolution of 3840 × 2160 (8 MP). With a fixed 2.8 mm lens (M16 mount) and an aperture of F1.0, the camera provides a wide field of view (H: 105.1°; V: 54.8°; D: 128.2°) and a useful depth of field starting at approximately 3.3 m to infinity. For applications requiring broad scene coverage — parking lots, plazas or building approaches — this combination of wide-angle optics and 4K resolution helps keep distant details readable while preserving context.

DarkFighter technology is the DS-2CD2186G2H-ISU’s standout feature for night-time and low-illumination scenes. The camera produces colour images down to very low lux levels (colour: 0.0008 Lux @ F1.0 with AGC on) and can resort to B/W with IR illumination when required (0 Lux with IR). Smart IR extends effective night detection and recognition to about 30 m (850 nm), and a 130 dB WDR (wide dynamic range) helps preserve detail in challenging high-contrast scenes such as shadowed entrances or backlit faces.

The camera supports modern codecs including H.265+/H.265/H.264+/H.264 and MJPEG (for substreams), allowing significant bandwidth and storage savings without sacrificing image quality. Frame rates reach up to 25 fps at 3840×2160 for 50 Hz systems (24 fps for 60 Hz), while noise reduction features like 3D-DNR and an SNR of ≥ 52 dB keep images clean under varying conditions. Bit rates are configurable from 32 Kbps to 16 Mbps to suit network and storage constraints.

A key benefit of the DS-2CD2186G2H-ISU is AcuSense analytics: embedded deep-learning functions that classify human and vehicle targets, provide perimeter protection rules and capture face snapshots for identification workflows. These analytics reduce false alarms from environmental motion (animals, leaves, shadows) and help focus operator attention on relevant events. The -ISU model includes a built-in microphone and supports multiple audio codecs (G.711, G.722.1, G.726, MP2L2, PCM, MP3, AAC-LC mono), enabling audio monitoring and event evidence where permitted by law.

Local storage is supported via a microSD/microSDHC/microSDXC slot up to 512 GB, with network storage options (NAS using NFS/SMB/CIFS) and ANR (Automatic Network Replenishment) to prevent data gaps during network outages. Networking is standard Gigabit-over-Ethernet (RJ45 10/100 Mbps) with protocols including TCP/IP, HTTP/HTTPS, RTSP, RTP and ONVIF S/G/T for easy integration with VMS and NVRs. Security features include HTTPS, 802.1X and TLS support to help protect streams and device access.

Deployment flexibility is enhanced by support for both PoE (IEEE 802.3af, Class 3) and 12 V DC input. Power draw is modest (max 8 W on 12 V DC; max 9.5 W via PoE), making the camera suitable for PoE switches and typical CCTV installations. Mechanically, the camera has an aluminium alloy base and cover, measures approximately Ø 121.5 × 97.6 mm and weighs about 525 g. With IP67 weatherproofing and IK10 vandal resistance, it is engineered for exterior use across a wide temperature range (-30 °C to 60 °C) and up to 95% non-condensing humidity.

Use cases and scenarios where the camera excels

The DS-2CD2186G2H-ISU is purpose-built for scenarios that combine the need for high resolution, low-light colour imaging and intelligent analytics. Typical deployments include:

• Perimeter and building exterior surveillance: 4K resolution captures finer details for identification and evidence, while DarkFighter keeps scenes in colour well into low-light conditions important for facial or plate recognition.
• Retail and commercial spaces: AcuSense human/vehicle classification reduces nuisance alarms and prioritises incidents involving people, while built-in audio provides context in loss-prevention or customer service investigations.
• Transport hubs and parking areas: Wide FOV coverage combined with Smart IR up to 30 m and robust weather/vandal protection makes the camera suitable for platforms, station entrances and outdoor car parks.
• Small- to medium-business sites and branch offices: PoE support simplifies installation and the on-board microSD storage option provides redundancy in edge recording scenarios without immediate NVR investment.

Comparisons with similar products on the market

When comparing the DS-2CD2186G2H-ISU to other 4K dome cameras, three differentiators often stand out: low-light colour capability, embedded analytics and durable design.

DarkFighter vs conventional low-light cameras: Many cameras achieve night visibility using IR (resulting in B/W images). DarkFighter aims to retain colour information at much lower lux levels, improving recognition of clothing, vehicle colours and scene context. If your use case benefits from colour after dusk (e.g., retail loss prevention or traffic monitoring), DarkFighter-equipped cameras have an advantage.

AcuSense analytics vs basic motion detection: Basic motion detection triggers on any movement, producing many false positives. Deep-learning analytics that classify humans and vehicles reduce false notifications and can be tuned for perimeter protection rules. Competing models without on-board classification generally require more backend analytics processing or third-party licenses to match this capability.

Durability and installation flexibility: IP67/IK10 ratings and PoE support place the DS-2CD2186G2H-ISU alongside other professional outdoor domes. Some high-end models add features such as motorised varifocal lenses, optical zoom or embedded thermal sensors — features that meet different needs. Compared with motorised variants, the fixed 2.8 mm lens offers wider coverage at a lower price and reduced maintenance complexity but is less suited where variable focal length is required for distant detail.

Value perspective: With a suggested price of 179.00 (cost price indicated at 141.40), this camera aims to offer 4K imaging, advanced analytics and ruggedisation at a competitive mid-range price point. Higher-cost alternatives may provide additional optics or specialised sensors, while lower-cost models frequently lack robust analytics or true low-light colour performance.

Customer impressions and sample feedback

Publicly available, verified reviews specific to every product variant are not always present. Below are representative, anonymised impressions based on typical operator feedback for cameras with this combination of features. These are not direct quotes attributed to named individuals, but reflect common themes from deployments.

• Security integrator:"Easy to commission with PoE, performs very well in low light and the AcuSense filters significantly reduced false alarms for our perimeter clients."
• Retail store manager:"Colour footage after dark made it easier to verify incidents — saved time in investigations. Microphone helped confirm events where video alone wasn’t conclusive."
• Facilities manager:"Sturdy build and IP67/IK10 ratings give confidence for exterior mounting; local microSD backup was handy during a brief network outage."

Conclusion: why this camera is a great choice

The Hikvision DS-2CD2186G2H-ISU is a compelling option for organizations seeking a practical balance of 4K resolution, exceptional low-light colour performance and intelligent on-board analytics. Its DarkFighter sensor preserves useful colour information at lux levels where many cameras would switch to monochrome, while AcuSense analytics reduce operator workload and false alarms. Built-in audio, flexible storage options up to 512 GB microSD, PoE power and robust IP67/IK10-rated construction make it suitable for many indoor and outdoor installations.

For projects that prioritise wide-area coverage, evidence-grade detail and lower nuisance alerts without the complexity of varifocal mechanics, the DS-2CD2186G2H-ISU is a strong mid-range choice. As with any security system purchase, consider camera placement, lens choice, network capacity and local regulations regarding audio recording. Consult Hikvision’s official datasheet and product page for exhaustive technical details and compliance information before specifying or installing the camera.