| Model | HT S501 | HT S502 | HT S401 |
| Detector Type | VOx | VOx | VOx |
| Infrared Image Resolution | 384×288 | 640×512 | 1280×1024 |
| Pixel Size | 12 μm | 12 μm | 12 μm |
| NETD | ≤40mK@25℃, F#1.0, 50Hz | ≤25mK@25℃, F#1.0, 50Hz | <40mK(@f/1.0, 30Hz, 300K) |
| Frame Rate | 50Hz | 60Hz | 30Hz |
| Focusing Mode | Manual Focus | Manual Focus | Manual Focus |
| Focal Length | 35mm | 50 mm | 50mm |
| Field Angle | 7.5°×5.7° | - | |
| Laser Ranging | 1500m | 1500m | |
| Diopter Adjustment | -6D ~ +4D | -5D~+5D | |
| Focusing Range | 5m ~ ∞ | - | |
| Display Screen Type | 0.39 Inch Color OLED | 0.5 Inch AMOLED | |
| Display Screen Resolution | 1024×768 | 1600×1200 | |
| Language | Chinese/English | Chinese/English | |
| Magnification | ×1/×2/×4/×8 | ×1/×2/×4/×8 | |
| Color Palette | White Hot, Black Hot, Fire Hot, Rainbow, Iron Red, Cold Color | White Hot, Black Hot, Fire Hot, Rainbow, Iron Red | |
| Photo/Video/PIP/Hot Point Track | Support | Support | |
| Internal Storage | Built-in 16G | 128G | |
| Photo/Video Format | JPG/MP4 | JPG/MP4 | |
| Battery Type | 3200mAh(18650)Rechargeable Lithium Battery | Rechargeable/Detachable Lithium Battery | |
| Protection Level | IP66 | IP66 | |
| Size | - | - | - |
| Weight | - | - | - |
| Other Specifications | |||
| Lens | 35mm | 50mm | |
| Detection Distance | Human | 1653m | 2361m |
| Vehicle | 4375m | 6250m | |
| Identification Distance | Human | 413m | 590m |
| Identification Distance | Vehicle | 1094m | 1563m |



HT S501/S401 Monocular Thermal Imager
Xintai HT-S501/S401 Monocular Handheld Infrared Thermal TelescopeDesigned for outdoor environments, this high-performance infrared thermal imager integrates thermal imaging observation and temperature measurement into one device. It assists you in easily conducting field exploration, equipment inspection, and security monitoring under challenging conditions such as darkness and dense fog. Explore the unknown with clear visibility – your reliable partner for outdoor operations.
High-Definition Imaging with Exceptional Clarity:The HT-S401 model boasts an HD resolution of 1280×1024, paired with a high-spec OLED/AMOLED display to deliver细腻 imagery with clearly revealed details. The HT-S502 model further features an ultra-high thermal sensitivity of ≤25mK, enabling it to detect extremely subtle temperature differences. Even in pitch darkness, dense fog, or thick forests, it effortlessly identifies targets.
Ultra-Long-Range Detection for a Head Start:Combining powerful laser rangefinding (up to 1500m) with an excellent optical system, it achieves exceptional detection and identification ranges. Specifically, the HT-S502 can detect a person at 2361 meters and a vehicle at 6250 meters, providing you with unparalleled long-range observation capability.
Multi-Spectrum HD, All-in-One Thermal, The Professional Choice!
The HT S501/S401 series thermal imaging systems integrate high-performance detectors, offering multiple resolution options (384×288/640×512/1280×1024) combined with adjustable frame rates (50Hz/60Hz/30Hz) to meet precise temperature measurement requirements across various scenarios. Equipped with either 1024×768 or 1600×1200 high-definition displays and featuring 1x/2x/4x/8x digital zoom capabilities, they deliver lossless magnification of distant details.
With professional color palettes (White Hot/Black Hot/Iron Hot/Rainbow/Iron Red/Cold) for intelligent adaptation to complex environments, these systems represent the ideal solution for industrial inspection, scientific research, and security surveillance applications.

infrared thermogram






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