MODEL | DT-NH921 | DT-NH931 |
IIT | Gen2+ | Gen3 |
Magnification | 1X | 1X |
Resolution | 45-57 | 51-57 |
Photocathode type | S25 | GaAs |
S/N(db) | 15-21 | 18-25 |
Luminous sensitivity(μa-lm) | 450-500 | 500-600 |
MTTF(hrs) | 10,000 | 10,000 |
FOV(deg) | 42+/-3 | 42+/-3 |
Detection distance(m) | 180-220 | 250-300 |
Adjustable range of eye distance | 65+/-5 | 65+/-5 |
Diopter(deg) | +5/-5 | +5/-5 |
Lens system | F1.2, 25mm | F1.2, 25mm |
Coating | Multilayer broadband coating | Multilayer broadband coating |
Range of focus | 0.25–∞ | 0.25–∞ |
Auto anti strong light | High Sensitivity, Ultra Fast, Broadband Detection | High Sensitivity, Ultra Fast, Broadband Detection |
rollover detection | Solid non-contact automatic detection | Solid non-contact automatic detection |
Dimensions (mm) (without eye mask) | 130x130x69 | 130x130x69 |
material | Aviation aluminum | Aviation aluminum |
Weight (g) | 393 | 393 |
Power supply (volt) | 2.6-4.2V | 2.6-4.2V |
Battery type (V) | AA(2) | AA(2) |
Wavelength of infrared auxiliary light source (nm) | 850 | 850 |
Wavelength of red-explode lamp source (nm) | 808 | 808 |
Video capture power supply (optional) | External power supply 5V 1W | External power supply 5V 1W |
Video resolution (optional) | Video 1Vp-p SVGA | Video 1Vp-p SVGA |
Battery life (hours) | 80(W/O IR) 40(W/IR) | 80(W/O IR) 40(W/IR) |
Operating Temperature (C | -40/+50 | -40/+50 |
Relative humidity | 5%-98% | 5%-98% |
Environment rating | IP65(IP67 Optional) | IP65(IP67 Optional) |
Left and right adjustment: Use your fingers to press the left and right adjustment buttons of the helmet pendant to slide the night vision components horizontally. When adjusted to the most suitable position, release the left and right adjustment buttons of the helmet pendant, and the night vision components will lock this Position, complete left and right horizontal adjustment. As shown in green in Figure ⑦.
Front and back adjustment: When you need to adjust the distance between the night vision goggles and the human eye, first turn the equipment locking knob of the helmet pendant counterclockwise, and then slide the night vision goggles back and forth. After adjusting to the proper position, turn the equipment clockwise to lock Turn the knob, lock the device, and complete the front and back adjustment, as shown in blue in Figure ⑦.