The Guide TU425S Thermal Scope combines high-sensitivity thermal imaging with a lightweight, compact riflescope design. Its 400×300@12µm thermal sensor and NETD sensitivity of 20mK reveal fine temperature differences, providing clear and detailed imagery in darkness, fog and other challenging conditions.

Equipped with a 25mm objective lens, 4.3×–17.2× magnification and a detection range of up to 1,300 metres, the TU425S is well suited to hunting, pest control and general outdoor use. Guide’s advanced APEXVISION image-processing system further improves image clarity, motion smoothness and long-range detail.

A shutterless design delivers smooth, uninterrupted viewing free of image freezing, while its 0.49-inch AMOLED display provides sharp, high-resolution viewing. The scope runs on a removable 18650 battery plus a built-in 18500 cell for up to 10 hours of operation, with USB-C charging and a 2.4G/5G wireless hotspot for use with compatible mobile devices.

Rugged Construction: IP68-rated protection against dust and water.

Mounting: Includes a Quick Release Scope Mount, torque rated at <2.5N·m / 22.13 in-lbs.

Specifications

Sensor

Type: Uncooled VOx infrared detector, 8–14µm
Resolution: 400 × 300 @ 12µm
NETD: 20mK
Frame Rate: 50Hz

Lens

Objective Lens: 25mm, F1.0
Field of View at 100m: 18m × 11m
Magnification: 4.3×–17.2×
Detection Range: Up to 1,300m

Display

Display Type: 0.49-inch AMOLED
Display Resolution: 1920 × 1080
Colour Palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot and Sepia

Eyepiece

Diopter Adjustment: -5D to +5D

Mount

Included Mount: Quick Release Scope Mount
Mount Torque Rating: <2.5N·m / 22.13 in-lbs

Hardware Interface

Interface: USB Type-C (5V DC 2A)
Wireless: 2.4GHz / 5GHz Wi-Fi hotspot

System Features

Recording: Video and snapshot capture, with audio
Standby Mode: Yes
Image Processing: APEXVISION

Power and Battery

Battery Type: 18500×1 built-in battery plus 18650×1 removable battery
Operating Time: Up to 10 hours
Charging: 5V DC 2A via USB-C

Environmental and Durability

Operating Temperature: -20°C to 50°C
Protection Rating: IP68

Physical Dimensions

Weight: 575g
Dimensions: 311 × 89 × 76mm