TPC-SD2241-B3F4-DW-S2 - is a bispectral thermal speed dome camera designed for perimeter protection and advanced thermal detection in outdoor environments. Equipped with a 256×192 VOx thermal sensor and a 4MP CMOS optical sensor , it offers reliable images and accurate analysis in any lighting conditions. The combination of 3.5mm thermal lens and 4mm visible lens ensures effective monitoring of small to medium areas with thermal and visible image fusion technology. Artificial Intelligence functions support human/vehicle classification, heat, smoke and call detection, while two-way audio , sound and light alarm , 360° PTZ rotation, PoE+ support and IP66 protection ensure high performance for professional security applications. Dahua
TPC-SD2241-B3F4-DW-S2 | POE PTZ THERMAL IP CAMERA WITH 4mm FIXED LENS - 3.5mm THERMAL LENS - 4 MEGAPIXELS - ARTIFICIAL INTELLIGENCE - TWO-WAY AUDIO - HEAT AND SMOKE DETECTION

The Dahua TPC-SD2241-B3F4-DW-S2 is a bispectral thermal speed dome camera designed for intelligent perimeter protection and advanced thermal detection. Thanks to the 256×192 VOx thermal sensor and the 4 MP CMOS optical sensor , it offers detailed and reliable images in any environmental conditions. The combination of 3.5 mm thermal lens and 4 mm visible lens enables effective monitoring of outdoor areas with thermal and visible image fusion technology. Artificial Intelligence functions support human/vehicle classification, heat, smoke, intrusion and call detection, while two-way audio , sound and light alarm , 360° PTZ movement, PoE+ support and IP66 protection ensure professional performance for advanced security.
Main specifications:
- 256 × 192 VOx thermal sensor
- 4 MP CMOS optical sensor
- 3.5mm thermal optics
- Visible optics 4 mm
- Continuous 360° PTZ
- AI: Human/Vehicle
- Heat and smoke detection
- Two-way audio
- Sound and light alarm
- PoE+ and IP66
Further details
The 4mm visible lens offers a wide 71.2° field of view, ideal for monitoring outdoor areas, perimeters and access points with detailed images and high scene coverage.
The 3.5 mm thermal optics enable the detection of heat sources and thermal anomalies over medium distances, making it particularly effective for security and fire prevention applications.
✅ Two-way audio:
Technical data sheet
| TPC-SD2241-B3F4-DW-S2 | |
| Thermal | |
| Detector Type | Vanadium oxide uncooled focal plane detector |
| Effective Pixels | 256 (H) × 192 (V) |
| Pixel Pitch | 12 μm |
| Spectral Range | 8 μm–14 μm |
| Sensitivity (NETD) | ≤40 mK (@f/1.0) |
| Focal Length | 3.5 mm |
| Field of View | H: 50.6°; V: 37.8° |
| Thermal Focus Control | Fixed-focal |
| Close Focus Distance | 0.5 m (1.64 ft) |
| Digital Detail Enhancement (DDE) | Yes |
| Digital Zoom | 16 levels |
| Thermal AGC | Auto/Manual |
| Thermal Noise Reduction | 2D NR/3D NR |
| Image Flip | 180°; Mirror |
| Color Palettes | 18 (white hot/black hot/fusion/rainbow/golden autumn/midday/iron red/amber/jade/sunset/icefire/painting/pomegranate/emerald /spring/summer/autumn/winter) |
| Visible | |
| Image Sensor | 1/2.7" CMOS |
| Max. Resolution | 2336 (H) × 1752 (V) |
| Pixel | 4 MP |
| Horizontal Definition |
≥1600 TVL |
| Min. Illumination | Color: 0.05 lux Black & white: 0.005 lux 0 lux (white light on) |
| Visible AGC | Auto/Manual |
| Visible Noise Reduction | 2D NR/3D NR |
| S/N Ratio | >55 dB |
| White Balance | Car; manual; indoor; outdoor; tracking; sodium lamp; street lamp; natural |
| Defog | Electronic defog |
| Electronic Shutter Speed | 1 s–1/30,000 s (auto/manual) |
| BLC | Yes |
| WDR | DWDR |
| HLC | Yes |
| Day/Night | Auto (ICR); Color; B/W |
| Iris Control | Manual/Auto |
| Image Flip | 180° |
| Exposure Compensation | Yes |
| Visible Focus Control | Fixed-focal |
| Focal Length | 4mm |
| Field of View | H: 71.2°; V: 52° |
| Close Focus Distance | 1 m (3.28 ft) |
| Openings | F1.6 |
| Illuminator On/Off Control | Auto; manual |
| Illumination Distance | 35 m (114.83 ft) |
| Audio and Video | |
| Video Compression | H.265; H.264M; H.264H; H.264B |
| Video Compression | |


