Dahua HAC-B1A21 2MP HDCVI IR Bullet Camera

The Dahua HAC-B1A21 is a compact, high-performance 2MP HDCVI IR bullet camera designed for cost-effective surveillance with professional-grade reliability. Combining Full HD 1080p resolution, infrared night vision up to 20 meters, and versatile lens options, this camera delivers consistent monitoring for residential, commercial, and small business security systems. Its rugged IP67-rated housing ensures durability in harsh environments, while multi-format video output compatibility makes it highly adaptable to existing setups.

Camera Performance

High-Quality 2MP CMOS Sensor

At the heart of the HAC-B1A21 is a 2MP CMOS image sensor capable of producing sharp and clear footage at a maximum resolution of 1920 × 1080 (Full HD). The progressive scanning system ensures smooth video with reduced motion blur, making it ideal for capturing moving objects such as vehicles or individuals.

Low-Light Sensitivity

The camera offers excellent performance in challenging lighting conditions. With a minimum illumination of 0.04 lux @ F2.0 in color mode and 0.004 lux @ F2.0 in black & white, it delivers usable video in near-dark environments. For completely dark conditions, the two built-in IR LEDs provide illumination up to 20 meters (65.6 ft), ensuring reliable night vision performance. Smart IR technology prevents overexposure of close objects, maintaining balanced images in low-light scenes.

Wide-Angle and Lens Options

The HAC-B1A21 supports three fixed focal length lens options:

• 2.8 mm – Wide-angle view (H: 100°) for monitoring open areas like entrances.
• 3.6 mm – Balanced coverage (H: 82°), ideal for general-purpose surveillance.
• 6 mm – Narrower field of view (H: 53°), suitable for focused monitoring such as gates or corridors.

With M12 lens mount support and fixed aperture (F2.0), the camera ensures optimized light capture across various focal lengths.

Pan/Tilt/Rotation Adjustment

For flexible installation, the camera allows pan (0°–360°), tilt (0°–90°), and rotation (0°–360°) adjustments, making it easy to position the device for the perfect field of view.

DORI Distance (Detect, Observe, Recognize, Identify)

Depending on the chosen lens, the HAC-B1A21 offers the following DORI ranges:

• 2.8 mm lens: Detect (46.9 m), Observe (18.8 m), Recognize (9.4 m), Identify (4.7 m).
• 3.6 mm lens: Detect (60.9 m), Observe (24.3 m), Recognize (12.2 m), Identify (6.1 m).
• 6 mm lens: Detect (82.8 m), Observe (33.1 m), Recognize (16.6 m), Identify (8.3 m).

These specifications help users select the right lens option for specific monitoring requirements.

Video Features

Multi-Format Support

The camera supports multiple video formats including HDCVI, HDTVI, AHD, and CVBS, switchable via a single BNC port. This flexibility allows seamless integration into both modern and legacy systems.

Video Frame Rates

• PAL: 1080p@25 fps, 720p@25 fps
• NTSC: 1080p@30 fps, 720p@30 fps
• CVBS: 960H resolution for analog systems

Image Enhancements

• Day/Night (Auto ICR) – Automatic switching between color and B/W modes.
• BLC/HLC/DWDR – Balanced exposure for backlit or high-contrast environments.
• 2D Noise Reduction – Improves clarity by reducing digital noise in low-light footage.
• White Balance – Automatic or area-based adjustment for natural color reproduction.
• Privacy Masking – Up to 8 rectangular zones to protect sensitive areas.
• Mirror Mode – Horizontal image flip option for installation flexibility.

Build & Design

Rugged Construction

Housed in a plastic casing with IP67 weatherproof protection, the HAC-B1A21 is built to withstand outdoor environments including rain, dust, and varying temperatures.

Compact Dimensions

• Camera size: 149.3 mm × 69.8 mm × 69.8 mm (5.88″ × 2.75″ × 2.75″)
• Net weight: 0.14 kg (0.31 lb)

Its lightweight and compact design make installation quick and unobtrusive.

Mounting Options

The camera supports wall mount, ceiling mount, and horizontal pole mount, ensuring versatility across various installation environments.

Power & Environmental Specifications

• Power Supply: 12 VDC ±30%
• Power Consumption: Max. 2.7 W (IR on)
• Operating Temperature: –40 °C to +60 °C (–40 °F to 140 °F)
• Operating Humidity: <95% (non-condensing)

This wide operating range makes the HAC-B1A21 suitable for both indoor and outdoor deployments, even in extreme climates.

Certifications

The camera meets international standards for safety and performance:

• CE (EN55032, EN61000, EN55024, EN62368-1)
• FCC (Part 15, ANSI C63.4-2014)

Conclusion

The Dahua HAC-B1A21 2MP HDCVI IR Bullet Camera delivers dependable performance, flexible installation, and efficient imaging at an affordable price. With Full HD resolution, infrared illumination, and multi-format support, it strikes a balance between advanced technology and cost-effectiveness. Whether used for residential protection, office surveillance, or small business security, this camera ensures reliable monitoring day and night.