Products Description
DT-NH821D Dual-Tube Night Vision Device
The DT-NH821D is a versatile dual-tube night vision device designed for users who need flexibility, reliable performance, and excellent value for money. Built with high-performance Gen 2+ image intensifier technology, it delivers clear night-time imaging in low-light environments while maintaining a compact and lightweight design.
modular two-in-one design
What makes the DT-NH821D stand out is its modular two-in-one design. The two night vision tubes can be used together as a binocular night vision device or separated into two independent monocular night vision devices. This gives users more flexibility for different observation tasks and allows one system to meet multiple operational needs.
The standard 1X configuration provides a wide 40° field of view for situational awareness and close-range observation. The device also supports 3X, 4X, and 5X magnification options, allowing users to adapt the system to different observation distances.
Key Performance
Built-in IR Illuminator
When ambient light is extremely low or the environment is completely dark, the integrated infrared illuminator provides additional illumination to help maintain a usable image. The automatic mode can also monitor ambient light and activate or deactivate the IR illumination as required.
Automatic Bright-Light Protection
A high-sensitivity ambient light detection system provides automatic protection against excessive light. When ambient illumination becomes too strong, the system automatically shuts down to help protect the image intensifier from damage.
Clear Imaging in Low-Light Conditions
Equipped with a high-performance Gen 2+ image intensifier, the DT-NH821D offers a resolution of 58–64 lp/mm, a signal-to-noise ratio of 18–24 dB, and a typical observation range of 180–220 m, depending on environmental conditions.
Lightweight and Rugged Construction
The housing is manufactured from aircraft-grade aluminum alloy, combining durability with a compact form factor. The device weighs approximately 628 g without batteries, making it suitable for extended use.
Technical Specification
|
MODEL |
DT-NH821D |
|
Generation |
Gen 2+/Gen3(optional) |
|
Magnification |
1X(3X/4X/5X) |
|
Resolution ( lp/mm) |
60-64 |
|
S/N (dB) |
18-24 |
|
FOV(°) |
42+/-3 |
|
Capability |
Flip-Up On-Off, Side Flip-Up On-Off |
|
Automatic Brightness Control |
YES |
|
Bright Light Cut-off |
YES |
|
Infrared Illuminator |
Built-in(850nm 20mW) |
|
IR Indicator |
YES |
|
Low Battery Indicator |
YES |
|
Adjustable range of eye distance |
65+/-5mm |
|
Diopter |
+5/-5 |
|
Range of focus (M) |
0.25--∞ |
|
Material |
Aviation aluminum |
|
Power supply |
2.6-4.2V |
|
Battery type |
CR123(A)x2 |
|
Operating Temperature (℃) |
-40/+50 |
|
Relative Humidity |
5%-98% |
|
Waterproof |
IP65(IP67 optional) |
|
Dimensions(mm) |
115x127x69 |
|
Weight(no battery) |
454g(housing)/628g(finished) |
Frequently Asked Questions
1.Can the DT-NH821D be used as two separate night vision monoculars?
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-
Yes. The DT-NH821D features a modular design that allows the binocular system to be separated into two independent monocular night vision devices. This provides greater flexibility when two separate observation devices are required.
2. What magnification options are available for the DT-NH821D?
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-
The standard configuration provides 1X magnification, while the system supports 3X, 4X, and 5X magnification options. Users can select the appropriate magnification according to their observation distance and application.
3. Does the DT-NH821D have a built-in infrared illuminator?
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-
Yes. The DT-NH821D features a built-in IR auxiliary illuminator. In extremely low-light or complete-darkness conditions, the IR mode can be activated to provide additional illumination and improve image visibility.
4. Does the DT-NH821D have automatic bright-light protection?
+
-
Yes. The device features a high-sensitivity automatic bright-light protection system. In automatic mode, the ambient light sensor monitors the surrounding illumination and can automatically shut down the system when the light level becomes too high, helping protect the image intensifier from excessive light exposure.
5. How long can the DT-NH821D operate on one set of batteries?
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The DT-NH821D uses two CR123 lithium batteries. Its continuous operating time is approximately 80 hours with the IR illuminator off and 40 hours with the IR illuminator on, depending on actual operating conditions.
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