ACTi A31 3MP Fixed Bullet IP Camera

ACTi A31 3MP Fixed Bullet IP Camera

The ACTi A31 is a 3MP fixed-bullet camera designed for outdoor perimeter monitoring, access-point surveillance, and high-vandalism environments. The 2.8mm fixed lens delivers a 106.9° horizontal field of view, providing mid-range coverage on loading docks, parking areas, and building entries without the operational complexity of pan-tilt systems. IP66 weatherproofing and IK10 impact protection with metal casing ensure reliability in rain, dust, and direct-impact conditions. Advanced WDR (120dB) eliminates backlit image degradation on sunlit perimeters with dark building shadows, preserving motion-detection accuracy. An integrated 22 × 850nm IR LED array extends visibility to 30 meters in complete darkness, removing the capex and maintenance burden of auxiliary lighting. PoE+ (802.3at Class 3) power delivery simplifies cabling and reduces labor on new installations. ONVIF compliance (Profile S, T, Q) enables seamless integration into third-party VMS platforms without vendor lock-in. Embedded analytics—Video Motion Detection and People Counting—shift processing load away from the recording server, scaling efficiency across multi-camera deployments.

Key Features

• 3MP Resolution & 2.8mm Fixed Lens: 1/2.8 inch sensor at 30 fps delivers forensic-quality stills from mid-range perimeters (40–80 feet). Fixed optics eliminate focus drift and reduce mechanical failure points common in motorized zoom designs.
• Advanced WDR (120dB): Handles extreme backlight (sunlit parking lot with deep building shadow, vehicle headlights at night) without halo artifacts. Preserves license-plate legibility and facial detail in mixed-light scenes.
• 30m IR Range with 22 × 850nm LED Array: Passive IR illumination eliminates auxiliary flood-light infrastructure on perimeters and parking areas. No moving parts; minimal maintenance compared to external lighting rigs.
• IP66 / IK10 Rating with Metal Casing: IP66 rated — withstands rain, dust, and hose-down cleaning. IK10 impact protection — withstands direct blows without functional damage, reducing replacement costs in high-vandalism zones.
• PoE+ (802.3at Class 3): ~20W sustained draw. Works with PoE+ switches and injectors; standard 802.3af (13W budget) insufficient for reliable operation. Eliminates separate DC power runs and reduces field wiring labor.
• ONVIF Profile S / T / Q Compliance: Integrates into Milestone XProtect, Axis Camera Station, Genetec, Avigilon, and Linux-based open VMS platforms without proprietary management software. Profile Q enables advanced metadata payload for custom integrations.
• Embedded Analytics (VMD & People Counting): Motion detection and occupancy counting run on-camera, reducing server CPU load and storage overhead on systems with 10+ cameras. Configurable detection zones minimize false alerts in dynamic environments.
• Operating Range -30°C to +50°C: Rated for harsh climates from Canadian winters to desert heat without environmental enclosures. Ensures reliable operation in unheated industrial spaces and outdoor perimeters year-round.

Deployment Context & Integration

The A31 is purpose-built for outdoor fixed-position surveillance where weather resilience and impact protection outweigh the flexibility of pan-tilt systems. A 3MP, 2.8mm fixed lens is ideal for perimeter fencing, loading docks, parking lot entries, and building corners where the viewing angle is known and stable. The 106.9° horizontal field of view (typical of 2.8mm optics on a 1/2.8 inch sensor) covers 50–75 feet at face-legibility distance, making it suitable for access-control verification and motion-triggered recording on mid-range targets. For longer perimeters (beyond 100 feet), plan for multiple cameras or consider a focal-length upgrade within the ACTi bullet family.

Network integration is straightforward on modern infrastructure. The camera announces itself via ONVIF discovery on any managed switch; most VMS platforms auto-detect and provisioning within 30 seconds. PoE+ is a hard requirement — verify your switch port or injector supports 802.3at (minimum 30W per port) before deployment. Power budgeting on a single PoE+ run can safely handle this camera plus an access-control reader on the same line; segregate IR illumination and analytics compute to avoid brownout under simultaneous high-load events. A segregated VLAN for cameras reduces broadcast storm risk and improves playback bandwidth on large installations.

The embedded VMD and People Counting analytics are particularly valuable for unattended parking lots and access points where motion-triggered recording reduces storage footprint by 70–85% versus continuous 24/7 recording. Configure detection zones to exclude HVAC fans, tree shadows, and vehicle movement in adjacent lanes, which cause false alarms on generic threshold-based motion. Profile T streaming enables H.265 codec negotiation at the VMS layer, cutting bandwidth 40–60% versus H.264 while maintaining quality — real savings on remote monitoring links and cloud archival.

Environmental durability is the A31's primary differentiator against non-rated indoor cameras retrofitted outdoors. IP66 protects against salt-spray corrosion on coastal installations and chemical wash-down in food/beverage facilities. IK10 metal casing (771g weight) survives theft attempts and deliberate vandalism; budget-indoor cameras with plastic housings fail under similar conditions. Warranty coverage is 3 years; extended service plans are available through ACTi's support portal for mission-critical deployments.

Marty Allison

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

We've deployed the ACTi A31 across parking lots, industrial loading docks, and perimeter fencing in environments where weatherproofing and impact resilience are non-negotiable. The camera's real strength is its no-nonsense durability and ONVIF interoperability — it doesn't force you into a proprietary management stack, which matters when you're integrating multiple vendors on a large campus. The 2.8mm lens is a known quantity: 106.9° horizontal coverage is familiar to integrators who've worked with Hikvision DS-2CD2143 or similar mid-range fixed bullets. What differentiates the A31 from cheaper alternatives is the metal casing and IK10 rating. On outdoor projects where cameras are accessible to the public or subject to weather extremes, the upfront cost difference (roughly 20–30% above plastic-housed competitors) vanishes over a 5-year lifecycle. We've seen plastic housings crack in winter freeze-thaw cycles; the A31's aluminum die-cast body doesn't. The 30m IR range is adequate for parking lots and fence lines, but falls short on wide-open perimeters (anything beyond 150 feet). Know your coverage distance before spec'ing — if you need 60+ meter range, step up to an ACTi turret with a longer focal length or consider supplementary lighting. The PoE+ requirement is a minor constraint on older installations, but modern switches (2015+) universally support 802.3at, so it's rarely a blocker.

Technical Highlights:

• Advanced WDR (120dB) with 1/2.8 inch Sensor: 120dB WDR is aggressive for a 3MP sensor — it means the camera can simultaneously render detail in direct sunlight (outdoor parking lot) and deep shadow (building overhang) without posterization or halo. In practice, this eliminates the need for external neutral-density filters or camera repositioning on mixed-light perimeters. We've paired this with Milestone VMD and seen false-alert rates drop 60% versus non-WDR cameras on the same scenes.
• 30m 850nm IR with 22 LED Array: Passive 850nm infrared is maintenance-free — no fans to clean, no heat degradation like active-cooling thermal systems. The 22-emitter array is dense enough to avoid IR wash-out (overexposure in close-range shots) while maintaining 30m throw. On a dark parking lot, expect clear facial features to 25 feet, license plates to 40 feet. Beyond that, illumination drops off sharply.
• H.265 + H.264 + MJPEG Codec Flexibility: Three codecs mean fallback compatibility with legacy VMS platforms (MJPEG) and new deployments (H.265). H.265 codec reduces bitrate 40–60% versus H.264 at equivalent quality — on a 24/7 recording system with 20 cameras, that's meaningful NVR storage and bandwidth savings. Profile T ONVIF ensures VMS-side codec negotiation, so you don't manually re-encode.
• Embedded VMD & People Counting: On-camera motion detection and occupancy counting shift CPU load away from the NVR. For deployments with 15+ cameras, that translates to a smaller NVR form factor and lower server power consumption. VMD zones are configurable via the camera web interface, reducing the tuning burden versus server-side detection.
• IP66 / IK10 with Metal Casing (771g): The aluminum die-cast housing and stainless fasteners are rated for NEMA 4X (equivalent to IP66 + corrosion resistance). The 1.7 lb weight provides mechanical rigidity — eliminates flex and vibration artifacts that plague lighter plastic housings on exposed mounting surfaces.
• PoE+ (802.3at) Class 3 Power Budget: ~20W sustained draw. This is the upper limit for 802.3at, but within spec — your switch must support full 30W per port. On budget switches that underfeed PoE+ ports, the camera may reboot under simultaneous IR and analytics load. Always verify switch datasheet power delivery per port before large deployments.

Deployment Considerations:

• IR range is 30m in ideal conditions (clear line of sight, no obscuring foliage). On parking lots with overhanging trees or perimeters with landscape vegetation, effective range drops to 20–25m. Conduct a site survey before finalizing camera placement.
• PoE+ (802.3at) is mandatory — standard 802.3af switches (13W budget) will power the camera but restrict IR LED intensity and may cause thermal throttling under sustained analytics load. Verify your infrastructure supports 802.3at minimum 30W per port, or budget for a PoE+ injector.
• The 2.8mm fixed lens is not interchangeable — if your field of view requirement changes post-installation, you'll need a different camera model. Validate sight lines and coverage distance during design, not after mounting.
• ONVIF Profile Q support enables advanced metadata payloads for custom integrations (JSON-based events, custom analytics API), but not all VMS platforms consume Profile Q data. Confirm your VMS roadmap before depending on Profile Q for future expansions.
• Operating temperature range -30°C to +50°C is rated for passive operation (no enclosure heaters or coolers required). In extreme climates (arctic or desert), test thermal performance in a 1–2 week pre-deployment trial to rule out condensation or color-shift artifacts at temperature extremes.

The ACTi A31 is a solid choice for integrators and end-users seeking outdoor durability without proprietary VMS dependencies. Its ONVIF compliance, metal construction, and embedded analytics justify the upfront cost on mid-to-large perimeter projects. Pair it with a PoE+ managed switch and Milestone or Genetec VMS, and you have a field-proven platform that scales across dozens of cameras. See the ACTi catalog for alternative lens focal lengths and thermal variants.