Guide TU425S

• Shutterless Imaging Architecture: The 3.0 shutterless design keeps the view uninterrupted during normal use, avoiding the periodic image freeze of a shutter-based calibration cycle, while a shutter module is retained specifically for startup and for maintaining image quality under significant temperature swings.
• 400×300 Detector with 15 mK NETD: The 12 μm pixel pitch detector delivers a low Noise Equivalent Temperature Difference of 15 mK, producing clean, low-noise thermal images for reliable target identification.
• IP68-Rated Housing with 6000J Shock Resistance: The scope is built to withstand sustained rifle recoil as well as wet, dusty, and rough field conditions, making it suitable for mounting on hard-recoiling hunting calibers.
• 48 mm Eye Relief: The generous eye relief keeps the shooter's eye well clear of the ocular lens under recoil, reducing the risk of scope bite when firing.
• Ultra-Lightweight at 575 g: A compact, low-weight housing keeps the added weight on the rifle to a minimum compared to bulkier thermal riflescopes.

ABOUT THE TU SE 3.0 SERIES

The TU SE 3.0 Series is part of Guide's TU 3.0 line of thermal imaging riflescopes, built around a shutterless imaging architecture, modular design, and AI-assisted image processing. The series is aimed at hunters, law enforcement, and other professional users who need a dependable thermal riflescope for night hunting, search and rescue, and personal security applications, where a scope has to keep working reliably in the field for extended periods.

Scopes in the series share a common design approach: an uncooled VOx infrared detector processed through Guide's ApexVision imaging system, a centrally positioned focus wheel and zoom lever for fast one-handed adjustment, and a rugged, IP68-rated housing rated for high shock loads, allowing the scope to withstand the recoil of hard-hitting hunting calibers as well as rough handling in the field.

Smart recording automatically captures a photo or video around the moment a shot is fired, giving the user a record of the shot without needing to start recording manually beforehand. Dual-band Wi-Fi connects the scope to the TargetIR APP for image transfer, remote control, and over-the-air firmware upgrades, keeping the device up to date without a separate service visit.

ABOUT THE MODEL (GUIDE TU425S)

The Guide TU425S is a thermal imaging riflescope built around a 400×300 uncooled VOx infrared detector with a 12 μm pixel pitch and a 15 mK NETD rating, paired with a 25 mm, F1.0 objective lens. This combination gives a 10.3° × 6.2° field of view (18×11 m at 100 m) and a 4.3x–17.2x magnification range, with a detection range of 1300 m / 1400 yd, suiting the scope to night hunting at close and medium distance where a wider field of view helps with tracking moving game.

The scope uses Guide's 3.0 shutterless imaging architecture, which keeps the sight picture uninterrupted during normal shooting rather than freezing periodically for shutter-based calibration; a shutter module is retained specifically to preserve image quality at startup and during significant temperature changes. A 48 mm eye relief and -5 to +5 diopter adjustment allow the scope to be set up safely behind hard-recoiling rifles while still giving a clear, correctly focused sight picture, and the standard 30 mm tube diameter is compatible with commonly available scope rings and mounts; a quick-release scope mount is included.

Images are shown on a 0.49" AMOLED display with 1920×1080 resolution, with seven selectable color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia) and manual focus for precise adjustment at different distances. Smart recording automatically saves photo and video with synchronized audio around each shot, backed by 64 GB of internal storage, and dual-band Wi-Fi (2.4 GHz/5 GHz) connects the scope to the TargetIR APP, while a built-in microphone and Bluetooth support additional connectivity.

Power comes from a built-in 18500 battery combined with an external, replaceable 18650 battery, together providing up to 8 hours of operating time. Weighing 575 g and measuring 311×89×76 mm, the IP68-rated housing with 6000J shock resistance and an operating range of -20°C to 50°C make the TU425S a practical, rugged choice for hunters who need a lightweight thermal riflescope that can withstand sustained recoil and outdoor use.

ABOUT GUIDE

Guide (Guide Sensmart Tech Co.) is a Chinese manufacturer specializing in infrared and thermal imaging technology, operating as a subsidiary of Wuhan Guide Infrared Co. Founded in 2016, the company focuses on the design and production of commercial infrared sensors and thermal imaging devices. More information about the manufacturer is available on the Guide brand page.

Guide's product range spans thermal monoculars, thermal binoculars, digital night vision devices, thermal imaging riflescopes, and thermal clip-on attachments developed for hunting, outdoor observation, search and rescue, and security applications. The company applies its own infrared detector and imaging processing technology across its product lines, aiming to make thermal imaging accessible to a broad range of outdoor and professional users.

MAIN FEATURES

• Core Technology: ApexVision S1 system architecture (ApexCore S1 detector + Platform Nexus 1.0 + Algorithm Hyper-Light 2.0)
• Sensor Type: Uncooled VOx Infrared Detector, 8–14 μm
• Resolution: 400×300 px
• Pixel Pitch: 12 μm
• NETD: 15 mK
• Frame Rate: 50 Hz
• Objective Lens: 25 mm, F1.0
• Magnification: 4.3x–17.2x
• Field of View: 10.3° × 6.2°
• Field of View at 100 m: 18 × 11 m
• Detection Range: 1300 m / 1400 yd
• Focus: Manual
• Display: 0.49" AMOLED, 1920×1080 px
• Color Palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eye Relief: 48 mm
• Diopter Adjustment: -5 to +5
• Digital Zoom: 14x
• Tube Diameter: Standard 30 mm
• Wi-Fi: 2.4 GHz / 5 GHz
• Interface: USB-C (Charge/USB 2.0)
• Additional Connectivity: Microphone, Bluetooth
• Recording: Photo/Video with audio, shot-activated
• Internal Storage: 64 GB
• Battery: 18500 battery (built-in) + 18650 battery (external, replaceable), up to 8 hours
• Operating Temperature: -20°C to 50°C
• Shock Resistance: 6000 J
• Waterproof Rating: IP68
• Weight: 575 g
• Dimensions: 311 × 89 × 76 mm

WARRANTY

The Guide TU425S thermal imaging riflescope is covered by a 3-year warranty.

IN THE BOX

• Guide TU425S Thermal Imaging Riflescope
• Quick-Release Scope Mount
• Carry Bag
• Lint-Free Cloth
• Battery Charger
• 18650 Battery ×2
• 5V 2A Adapter
• USB-A to USB-C Cable
• Quick Start Guide
• Warranty Card