Product Overview
Designed for commercial ceilings, retail floors, and outdoor-facing walls where both image detail and low-light performance matter, the DS-2CD2166G2H-ISU is a 6 MP fixed dome with Hikvision’s DarkFighter sensor technology. Featuring a 1/2.4″ progressive-scan CMOS sensor capturing 3200 x 1800 resolution, it delivers colour imaging at 0.001 lux and 120 dB true WDR for scenes with strong backlighting or mixed contrast. Built with an aluminium alloy housing rated IP67 and IK10, it handles both weather exposure and deliberate physical impact. AcuSense deep-learning analytics classify detected motion as human or vehicle, reducing nuisance alerts in busy environments. Two lens options are available: a 2.8 mm wide-angle (114.8 degrees horizontal) and a 4 mm option (94 degrees horizontal), with a black-finish 2.8 mm variant also offered for installations where visual discretion matters. H.265+ compression keeps bandwidth and storage demands manageable across larger deployments.
Key Capabilities
DarkFighter Low-Light Imaging
The 1/2.4″ CMOS sensor maintains colour output at 0.001 lux, making it effective in dimly lit lobbies, underground car parks, stairwells, and other areas where standard sensors switch to black and white or lose detail entirely.
6 MP Resolution at 3200 x 1800
At 6 megapixels, the camera captures fine detail across wide scenes, making it practical for retail floors, reception areas, and car park entrances where subject identification at distance is a priority.
AcuSense Human and Vehicle Classification
Deep-learning analytics separate humans and vehicles from other motion sources. This is particularly useful in commercial and campus environments where passing traffic or foliage movement would otherwise trigger constant alerts.
120 dB True WDR
True wide dynamic range at 120 dB handles entrances, shopfronts, and external-facing positions where direct sunlight and deep shadow appear within the same frame, preserving detail in both zones simultaneously.
IP67 and IK10 Rated Housing
The aluminium alloy dome is fully sealed against dust and water ingress and rated IK10 for impact resistance. This suits exposed outdoor ceiling positions, stairwells, and public-access areas where vandal protection is a practical consideration.
Flexible Lens and Finish Options
Choose 2.8 mm for broad ceiling coverage or 4 mm for a tighter corridor or driveway view. The black 2.8 mm variant blends into dark ceiling surfaces in retail, hospitality, and commercial fitouts where a white dome would stand out.
Best For
- Retail and Commercial Interiors: The 2.8 mm wide-angle lens and 6 MP resolution cover large floor areas from ceiling height, capturing sufficient detail for incident review across aisles, counters, and open plan spaces.
- Outdoor Entrances and Car Parks: IP67 and IK10 ratings support exposed mounting positions at building perimeters, with DarkFighter performance handling low-light conditions common at entry points after hours.
- Campus and Multi-Building Sites: AcuSense classification and ONVIF Profile S/G/T compatibility make this suitable for sites running professional VMS platforms across multiple buildings or zones.
- Corridors and Stairwells: The 4 mm lens narrows the horizontal field to 94 degrees, making it well suited to confined directional spaces where a wider lens would include unnecessary wall coverage.
Why Choose the DS-2CD2166G2H-ISU
A basic 2 MP or 4 MP dome at this price point will not deliver the same combination of 6 MP resolution, DarkFighter low-light performance, and AcuSense deep-learning classification that the DS-2CD2166G2H-ISU provides. The 0.001 lux colour threshold means the camera retains usable colour footage in conditions where lower-grade sensors have already switched to monochrome. The 120 dB true WDR is not a software simulation, meaning backlit entrances and mixed-light retail environments are handled without blown-out windows or silhouetted subjects. The IK10 housing goes beyond weatherproofing to handle physical interference in publicly accessible locations. The choice between 2.8 mm and 4 mm lenses, plus a black finish variant, means the camera can be specified correctly for the installation rather than forced to fit. Available through Security Wholesalers, this model suits integrators and installers who need a step above entry-level dome performance without moving to a higher product tier.
Buyer Decision Tips
Lens Selection: The 2.8 mm lens covers a horizontal field of 114.8 degrees and suits ceiling-mounted positions in open areas such as retail floors, lobbies, and car park bays. The 4 mm lens narrows to 94 degrees horizontal and is more appropriate for corridors, driveways, and positions where a tighter, more directed view reduces wasted coverage at the frame edges. The depth of field on the 2.8 mm starts at 1.7 m, so avoid mounting at heights below 2 m in areas where close-range subjects would fall outside the focal range.
Audio Recording: The SU variant includes a built-in microphone for on-site audio capture, which is useful in interview rooms, reception areas, or any space where audio context supports incident review. Confirm compliance with state-based audio recording regulations before enabling this feature. Note that a built-in speaker is not included, so one-way audio capture only is supported by this camera on its own.
Key Features & Technical Specifications
| Image Sensor |
1/2.4″ Progressive Scan CMOS |
| Maximum Resolution |
3200 x 1800 (6 MP) |
| Lens Options |
Fixed focal: 2.8 mm (H 114.8°, V 60°, D 143.5°) or 4 mm (H 94°, V 50.2°, D 112°) |
| Depth of Field |
2.8 mm: 1.7 m to infinity; 4 mm: 2.2 m to infinity |
| Min. Illumination (Colour) |
0.001 lux @ F1.0 |
| Min. Illumination (B/W) |
0 lux with IR active |
| WDR |
120 dB True WDR |
| IR Illuminator |
Up to 30 m, 850 nm smart IR |
| Video Compression |
H.265+ / H.265 / H.264+ / H.264 / MJPEG |
| Video Streams |
Main, Sub, Third stream options |
| Audio |
Built-in microphone (SU variant) |
| Analytics |
AcuSense deep-learning human and vehicle classification |
| Network and Security Protocols |
ONVIF Profile S/G/T, TLS, HTTPS, 802.1x |
| Housing |
Aluminium alloy base and cover |
| Ingress and Impact Rating |
IP67, IK10 |
| Power Input |
12 V DC ±25% or PoE (IEEE 802.3af Class 3) |
| Max. Power Consumption |
Approx. 9.5 W |
| Dimensions |
Diameter 121.5 mm x 97.6 mm |
| Weight |
Approx. 525 g |
| Variants Available |
White 2.8 mm, White 4 mm, Black 2.8 mm (subject to availability) |
Ideal Use Cases
Retail Floor Monitoring
The 2.8 mm lens at 114.8 degrees horizontal covers wide retail floor areas from ceiling positions, while 6 MP resolution retains enough detail across the frame for post-event review without requiring multiple cameras in small spaces.
Commercial Car Parks
DarkFighter colour performance at 0.001 lux and 30 m IR illumination keep footage usable in poorly lit parking structures. IK10 housing protects against accidental or deliberate impact in vehicle access areas.
Building Entrances and Lobbies
120 dB true WDR manages the high-contrast lighting typical of glass-fronted lobbies and doorways, where natural light behind subjects would otherwise create silhouetting that makes identification difficult.
Campus and Education Facilities
AcuSense human and vehicle classification filters alerts to relevant events in high-traffic outdoor areas such as school grounds, university pathways, and sports precincts, reducing the volume of non-actionable notifications to monitoring staff.
Hospitality and Accommodation
The black 2.8 mm variant integrates into dark ceiling finishes found in hotel corridors, bar areas, and restaurant fitouts where a white dome housing would be visually out of place. IP67 extends deployment options to covered outdoor dining and pool areas.
Choosing the Right Model
- Choose this model if: You need 6 MP resolution with genuine DarkFighter low-light colour performance, AcuSense human and vehicle classification, and a vandal-resistant dome rated IK10 for commercial indoor or outdoor mounting in a fixed focal length format.
- Choose a different model if: Your installation requires optical zoom or a motorised varifocal lens to adjust coverage after mounting without physical lens changes. A fixed focal dome is set at installation and cannot be re-zoomed remotely or adjusted beyond the preset lens options.
- Choose a different model if: You require two-way audio communication through the camera. This model includes a built-in microphone in the SU variant for audio capture only. A camera with both a built-in microphone and a built-in speaker would be needed for two-way voice capability.
FAQs
- What is the difference between the 2.8 mm and 4 mm lens options on the DS-2CD2166G2H-ISU?
The 2.8 mm lens covers a horizontal field of 114.8 degrees, making it suited to wide ceiling positions in open areas such as retail floors, lobbies, and car park bays. The 4 mm lens narrows to 94 degrees horizontal and is more appropriate for corridors, driveways, or directed positions where tighter framing reduces irrelevant coverage at the edges of the frame.
- What are the DORI distances for each lens option?
For the 2.8 mm lens: Detect approximately 64 m, Observe approximately 25 m, Recognise approximately 12 m, Identify approximately 6 m. For the 4 mm lens: Detect approximately 77 m, Observe approximately 30 m, Recognise approximately 15 m, Identify approximately 7 m. These figures guide placement decisions based on the level of subject detail required at a given distance.
- Is the black finish variant functionally different from the white version?
No. The black 2.8 mm variant is identical in specification to the white 2.8 mm version. The finish difference is purely aesthetic, intended for installations on dark ceilings or within fitouts where a white dome would create visual contrast. It is only available in the 2.8 mm focal length.
- Does the DS-2CD2166G2H-ISU support PoE and what class is required?
Yes. The camera supports PoE to IEEE 802.3af Class 3 as well as 12 V DC ±25%. Maximum power consumption is approximately 9.5 W. Confirm your PoE switch or injector supplies sufficient power per port, particularly when running multiple cameras from the same switch.
- Does the built-in microphone mean the camera supports two-way audio?
No. The SU variant includes a built-in microphone that captures on-site audio, which is recorded alongside video footage. The camera does not include a built-in speaker, so two-way audio communication is not supported by this unit alone. Always confirm compliance with relevant state-based audio recording laws before enabling audio capture.
- What VMS and recorder platforms is this camera compatible with?
The DS-2CD2166G2H-ISU supports ONVIF Profile S, Profile G, and Profile T, which provides broad compatibility with most professional VMS platforms and IP-capable recorders. It also supports Hikvision’s native integration for environments running Hikvision NVRs or management software. Available through Security Wholesalers, the camera is stocked alongside compatible Hikvision NVRs and accessories.
- How should IR reflections be managed during installation?
Avoid mounting the camera so that the IR illuminator faces a highly reflective surface at close range, such as a white wall directly in front of the lens or a glass panel. IR light bouncing back into the lens will wash out the image and reduce effective night-time performance. Angle the camera so the primary illumination zone covers open space rather than a flat reflective surface.
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