DH-SDT4E425-8P-GB-APV1 2_2
DH-SDT4E425-8P-GB-APV1 3_3
DH-SDT4E425-8P-GB-APV1 1_1
By Dahua

Dahua DH-SDT4E425-8P-GB-APV1 4MP 25x Auto Tracking Outdoor PTZ Camera

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SKU: DH-SDT4E425-8P-GB-APV1
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  • 4MP Ultra HD & 25x Optical Zoom — capture license plates and faces from 300ft away
  • Auto Tracking 3.0 automatically follows moving targets with detailed trajectory recording
  • 360° endless pan & 105° tilt with 200°/s speed — zero blind spots across large areas
  • 120dB True WDR handles strong backlight — clear images even in direct sun or bright doorways
  • Active Deterrence with audible/visual alarms triggered by motion events
  • IP66 weatherproof & IK10 vandal-resistant — built for outdoor use in rain, dust, and impact
  • Supports up to 256GB MicroSD local storage — no monthly fees
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User Manual
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Dahua 4MP 25x PTZ Camera with Auto Tracking 3.0

DH-SDT4E425-8P-GB-APV1 details_h2_image1
DH-SDT4E425-8P-GB-APV1 1_1

See Everything — Wide Area & Fine Details

This Dahua PTZ camera combines a 4MP bullet channel with a 4MP PTZ channel to cover large areas while zooming into critical details. The 25x optical zoom (4.8–120mm) lets you read license plates or identify faces from over 300 feet away. 180° wide-angle splicing gives you a complete view without blind spots.

DH-SDT4E425-8P-GB-APV1 2_2

Auto Tracking 3.0 — Follows Intruders Automatically

The camera's Auto Tracking 3.0 locks onto moving targets and follows them across the full 360° pan range. It records the complete trajectory, so you get a full record of every intrusion. Combined with IVS perimeter protection and smart motion detection, false alarms from leaves or animals are filtered out.

DH-SDT4E425-8P-GB-APV1 3_3

Clear Images in Any Light — Day or Night

With 120dB True WDR, this camera handles strong backlight — like sunlit windows or bright doorways — without washing out details. At night, the 100m IR range provides reliable visibility in total darkness. The 1/2.8" CMOS sensor delivers crisp 4MP video at 60fps.

Built Tough for Outdoor Installation

Rated IP66 and IK10, this PTZ camera survives rain, dust, and physical impact. It operates from -40°C to +70°C, making it suitable for harsh climates. Power via PoE+ (IEEE 802.3at) or 24V AC simplifies installation — one cable for data and power.

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Specification

Camera

Image Sensor Overview channel: 1/2.7" CMOS; Detail channel: 1/2.8" CMOS
Pixel Overview channel: 8 MP; Detail channel: 4 MP
Max. Resolution Overview channel: 4096 (H) × 1860 (V); Detail channel: 2560 (H) × 1440 (V)
Electronic Shutter Speed 1 s–1/30,000 s
Scanning System Progressive
Min. Illumination Overview channel:
0.005 lux@F1.4 (Color, 30 IRE);
0.0005 lux@F1.4 (B/W, 30 IRE);
0 lux (illuminator on)
Detail channel:
0.005 lux@F1.6 (Color, 30 IRE);
0.0005 lux@F1.6 (B/W, 30 IRE);
0 lux (illuminator on)
Illumination Distance Overview channel: 30 m (98.43 ft) (IR); 30 m (98.43 ft) (white light); Detail channel: 100 m (328.08 ft) (IR); 50 m (131.23 ft) (white light)
Illuminator On/Off Control Overview channel:
Manual; Auto; Off
Detail channel:
Zoom Prio; Manual; Auto; Off
Illuminator Number Overview channel: 2 (IR light); 2 (White light); Detail channel: 2 (IR light); 2 (Warm light)

Lens

Focal Length Overview channel: 2.8 mm; Detail channel: 5 mm–125 mm
Max. Aperture Overview channel: F1.4; Detail channel: F1.6-F3.6
Field of View Overview channel: H: 180°; V: 86°; Detail channel: H: 51.9°–3.0°; V: 39.7°–2.2°; D: 63.1°–3.7°
Optical Zoom Overview channel: NA; Detail channel: 25×
Focus Control Auto; manual; semi-auto
Close Focus Distance Overview channel: 0.6 m (1.97 ft); Detail channel: 0.1 m–0.5 m (0.33"–1.64")
Iris Control Overview channel: NA; Detail channel: Auto; manual; iris prio
Iris Control Type P-Iris

DORI

Detect Overview channel:
2.8 mm
Detect 56.0 m (183.72 ft)
Observe 22.4 m (73.49 ft)
Recognize 11.2 m
(36.74 ft)
Identify 5.6 m
(18.37 ft)
Detail channel:
W 		100.0 m (328.08 ft)
Detail channel:
T 		2500.0 m (8202.00 ft)

PTZ

Pan/Tilt Range Pan: 0° to 360° endless
Tilt: –15° to +90°, auto flip 180°
Manual Control Speed Pan: 0.1°/s–180°/s;
Tilt: 0.1°/s–90°/s
Preset Speed Pan: 0.1°/s–180°/s;
Tilt: 0.1°/s–90°/s
Preset 300
Tour 8 (up to 32 presets per tour)
Pattern 5
Scan 5
Power-off Memory Yes
Idle Motion Preset; Pattern; Tour; Scan

Intelligence

IVS (Perimeter Protection) Tripwire; intrusion; crossing fence detection; loitering detection; abandoned/missing object; fast moving; parking detection; people gathering; human alarm classification; linkage tracking
Smart Tracking Wiztracking;Relay Tracking
SMD SMD4.0
Acupick Uses deep learning algorithms and works with backend devices to accurately match targets, such as people and motor vehicles, and search through live and recorded videos to quickly locate targets
(Overview channel support)
Auto Patrol After an IVS alarm is triggered, it can link with up to 5 presets or scan to patrol the key areas. IVS can be enabled with SMD at the same time.

Active Deterrence

Light Warning Red-Blue light warning;
Flash duration: 5 s–30 s;
Flash frequency: high, medium, low
Sound Warning Offers 11 sound alarm and 10 custom sound alarms can be imported.
Sound can be set from 0%–100%.
Play times can be set from 1-10.

Video

Video Compression Smart H.265+;H.265;Smart H.264+;H.264B;H.264M;H.264H;MJPEG(Sub Stream 1)
Streaming Capability 3 streams
Resolution Overview channel: 8M (4096 × 1860); 2M (2048 × 928); 1080p (1920 × 1080); 720p (1280 × 720); 1024 × 448; D1 (704 × 576/704 × 480);VGA (640 × 480);CIF (352 × 288/352 × 240); Detail channel: 4M (2560 × 1440); 3M (2304 × 1296); 1080p (1920 × 1080); 1.3M (1280 × 960); 720p (1280 × 720); D1 (704 × 576/704 × 480);VGA (640 × 480); CIF (352 × 288/352 × 240)
Video Frame Rate Overview channel:
Main stream: 4096 × 1860 @(1–25/30 fps)
Sub stream 1: 1024 × 448/D1/VGA/CIF @(1–25/30 fps)
Sub stream 2: 2048 × 928/1080p/1.3M/720p @(1–25/30 fps);
Detail channel:
Main stream: 4M/3M/1080p/1.3M/720p @(1–25/30 fps)
Sub stream 1: D1/VGA/CIF @(1–25/30 fps)
Sub stream 2: 1080p/1.3M/720p/ @(1–25/30 fps)
Bit Rate Control CBR/VBR
Video Bit Rate Overview channel:
H264: 128 kbps–16,384 kbps
H265: 51 kbps–13,312 kbps;
Detail channel:
H264: 96 kbps–16,384 kbps
H265: 38 kbps–10,240 kbps
Day/Night Overview channel: Auto; Color; B/W; Electronic
Detail channel: Auto; Color; B/W; Electronic
BLC Yes
WDR Overview channel: DWDR; Detail channel: 120 dB
HLC Yes
White Balance Overview channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp
Detail channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp
Gain Control Overview channel: Auto; manual; gain prio
Detail channel: Auto; manual; gain prio
Noise Reduction Overview channel: 2D NR; 3D NR
Detail channel: Auto: 2D NR; 3D NR
Motion Detection Yes
Region of Interest (RoI) Yes
Image Stabilization Overview channel: NA
Detail channel: Electronic Image Stabilization (EIS)
Defog Overview channel: Electronic
Detail channel: Electronic
Digital Zoom Overview channel: NA;
Detail channel: 16×
Image Rotation Overview channel: NA
Detail channel: 180
S/N Ratio Overview channel: ≥55 dB
Detail channel: ≥55 dB
Privacy Masking Up to 24 areas can be set, with up to 8 areas in the
same view Multiple colors and mosaic available

Audio

Audio Compression PCM, G.711A, G.711Mu, G.726, MPEG2-Layer2, G.722.1, G.729

Network

Network Port RJ-45 (100/1,000 Base-T)
Network Protocol HTTP; HTTPS; TCP/IP; IPv4; RTSP; UDP; SMTP; NTP; DHCP; DNS; DDNS; IPv6; 802.1x; SSL; QoS; FTP; UPnP; ICMP; SNMP; IGMP; ARP; RTCP; RTP; PPPoE; RTMP; Bonjour; NFS
Interoperability ONVIF (Profile S & Profile G & Profile T & Profile M);CGI;SDK;P2P
Streaming Method Unicast/Multicast
User/Host 20 (total bandwidth: 64 M)
Storage Micro SD card (512 GB); FTP/SFTP; NAS
Browser web5.0:
IE 9 and later versions;
Chrome 41 and later versions;
Firefox 52 and later versions;
Safari 10 and later versions
Management Software DMSS; DSS Pro
Mobile Client iOS; Android

Certification

Certifications CE: EN 50130-4
EN 55032
EN 55035
EN 61000-3-3
EN IEC 61000-3-2
EN 62368-1; Port
Audio Input 1 channel (LINE IN, bare wire)
Audio Output 1 channel (LINE OUT,bare wire;built-in speaker (mutually exclusive))
Alarm Input 2 channels in: supports wet contact connection (max load 5 mA 3–5 VDC); supports dry contact connection
Alarm Output 1 channel out: dry contact, max load 1,000 mA 30 VDC/500 mA 50 VAC
Alarm Linkage Capture; recording; send email; preset; tour; pattern; alarm digital output; audio; warning light
Alarm Event Motion/tampering detection; network disconnection detection; IP conflict detection; memory card state detection; memory space detection

Power

Power Supply 12 VDC(± 10%), 3 A ;PoE+ (802.3at)
Power Consumption Basic: 14 W;
Max: 25 W (illuminator + heating glass + Siren and Light Active Deterrence + ICR + PTZ)
Power Adapter Optional

Environment

Operating Temperature –40 °C to +65 °C (–40 °F to +149 °F)
Operating Humidity ≤95%
Protection IP66; TVS 6000 V lightning proof; surge protection; voltage transient protection

Structure

Product Dimensions 194.2 mm × 160 mm × 311 mm (7.65" × 6.30" × 12.24") (L × W × H)
Net Weight 3.1 kg (6.83 lb)
Gross Weight 4.6 kg (10.14 lb)

FAQ

Does this camera support auto tracking?

Yes, it features Auto Tracking 3.0. Once a moving target is detected, the PTZ automatically follows it and records the full trajectory for detailed evidence.
What is the zoom range on this PTZ camera?

It has a 25x optical zoom with a focal length of 4.8–120mm. You can zoom in to read license plates or identify faces from over 300 feet away.
Can this camera see in complete darkness?

Yes, it has 100m IR night vision range. The IR LEDs provide clear black-and-white video in total darkness, and the 0.005 Lux color sensitivity works in very low light.
Is this camera suitable for outdoor use in rain or snow?

Absolutely. It is IP66 weatherproof and IK10 vandal-resistant, so it withstands rain, dust, snow, and physical impact. It also operates in temperatures from -40°C to +70°C.