The ThermTec Hunt Pro 635L is a thermal clip-on scope designed to convert standard daytime rifle optics into a thermal targeting system without losing daytime zero or eye relief. Featuring an uncooled 640 × 512 VOx sensor with a sub-15 mK NETD rating and a 35 mm focal length lens, the unit provides medium-range target detection up to 1,800 metres. An integrated 1,000 m laser rangefinder delivers real-time distance and ballistic holdover guidance directly onto a 1920 × 1080 OLED display. Housed in an IP67-rated chassis weighing approximately 463 g with the LRF module and battery installed, the system mounts via standard M52 × 0.75 threading without causing front-heavy imbalance during mobile hunting.

Key Features

• High-Resolution Thermal Imaging: Utilises a 640 × 512, 12 µm thermal sensor (≤ 15 mK NETD) paired with a 35 mm objective lens delivering a 21.9 m field of view at 100 m.
• Integrated Laser Rangefinder: Built-in 1,000 m LRF (±1 m accuracy) with ballistic calculations that account for target distance and weapon inclination angle.
• Shutterless AI Calibration: Eliminates image freezing during continuous scanning and uses Recoil-Activated Video (RAV) to capture 11 seconds of footage before and after discharge.
• Digital Zoom & E-Level: Offers 2x, 3x, and 4x digital magnification inside clip-on mode alongside an electronic level to correct weapon cant.
• Extended Swappable Power: Powered by removable, rechargeable lithium-ion batteries providing up to 10 to 12 hours of operational runtime via a USB-C interface.

Specifications

• Sensor Resolution: 640 × 512 uncooled VOx
• Pixel Pitch: 12 µm
• Thermal Sensitivity: NETD ≤ 15 mK
• Frame Rate: 50 Hz
• Focal Length: 35 mm
• Field of View: ~21.9 m @ 100 m
• Display: 0.39-inch HD OLED (1920 × 1080)
• LRF Range: Up to 1,000 m (±1 m accuracy)
• Detection Range: Up to 1,800 m
• Mounting Interface: M52 × 0.75 connection thread
• Recoil Rating: Up to 6,000 J
• Ingress Protection: IP67
• Operating Temperature: -20 °C to +50 °C
• Weight: 399 g (base unit); ~463 g (with LRF and battery)
• Dimensions: Approximately 118–120 mm × 66 mm × 77 mm

Who is the ThermTec Hunt Pro 635L Thermal Clip-On for?

• Nighttime spot-and-stalk pest controllers — maintains dynamic mobility over long foot patrols because the total thermal clip-on system weighs approximately 463 g while delivering a wide 21.9 m field of view at 100 m from its 35 mm focal length lens.
• Medium-range feral animal hunters targeting wild pigs and foxes — provides precise shot placement on intermediate targets using an integrated 1,000 m laser rangefinder paired with a 640 × 512 uncooled VOx sensor rated to ≤ 15 mK NETD.

Less suitable for: Open-plains targeting requiring detection past 2,000 m, which requires a larger 50 mm objective thermal clip-on, or extreme heavy-recoil platforms exceeding a 6,000 J impact threshold.