MODEL | DT-NH821D | DT-NH831D |
IIT | Gen2+ | Gen 3 |
Magnification | 1X | 1X |
Resolution | 45-57 | 51-63 |
Photocathode type | S25 | GaAs |
S/N(db) | 15-21 | 18-25 |
Luminous sensitivity(μa-lm) | 450-500 | 500-700 |
MTTF(hrs) | 10,000 | 10,000 |
FOV(deg) | 42+/-3 | 42+/-3 |
Detection distance(m) | 180-220 | 250-300 |
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 broadband detection | High sensitivity broadband detection |
rollover detection | Solid non-contact automatic detection | Solid non-contact automatic detection |
Dimensions | 115x183x54 | 115x183x54 |
Material | Aviation aluminum | Aviation aluminum |
Weight(no battery) | 605 | 605 |
Power supply | 2.6-4.2V | 2.6-4.2V |
Battery type | AA(2) | AA(2) |
Battery life(H) | 80(W/O IR) 40(W/IR) | 80(W/O IR) 40(W/IR) |
Operating Temperature(℃) | -40/+50 | -40/+50 |
Relative humility | 5%-98% | 5%-98% |
Environment rating | IP65(IP67 optional) | IP65(IP67 optional) |
The night vision system supports the replacement of different magnification lenses to meet the requirements of different observation distances. When replacing the objective lens, the objective lens is rotated counterclockwise. Remove the object lens mounted on the night vision instrument. Then the objective lens that needs to be replaced is rotated clockwise to be installed on the host of the night vision instrument.