Guide TU425SE 3.0 Thermal Riflescope

The Guide TU425SE 3.0 delivers the full Guide 3.0 platform in the lightest traditional-eyepiece thermal riflescope in the TU lineup: shutterless calibration, IP68 durability, recoil-activated recording, and 12-hour battery life. At just 575 grams, the TU425SE is built for hunters.

Key Features

• 400 × 300 thermal sensor, 12 μm pixel pitch — 120,000 thermal pixels with ≤20 mK NETD deliver clean, usable imagery in complete darkness and through smoke, with a thermal detection range of 1,300 meters. Shutterless 3.0 calibration keeps the display live at 50 Hz, with no freeze frames during recalibration.

• 25mm F1.0 objective lens — a compact, fast objective with a 10.3° × 6.2° field of view.

• 1920 × 1080 AMOLED display — a crisp, high-contrast eyepiece display that renders thermal imagery with clean detail across the full 3.1x–12.4x magnification range. Seven color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia) let you match the display to conditions and preference.

• Recoil-activated recording — each shot automatically captures a 15-second video clip and 5 still photos, stored on 32 GB of internal memory. Playback lets you review shots.

• 12-hour battery — a built-in 18500 rechargeable cell works with replaceable external 18650 power, rated by Guide at 12 hours.

• 575 grams / 20.28 oz — the lightest scope-form-factor thermal in the Guide TU lineup, at a compact 311mm overall length.

• IP68 / 6,000J shock rating — fully sealed against dust and submersion, and rated for recoil up to .300 Win Mag. Built to perform in extreme cold (−4°F) through desert heat (122°F).

Comparing models? See where the TU425SE fits in the full Guide Sensmart thermal range, or browse our other thermal riflescopes.

Ideal For

Hunters who want the Guide 3.0 platform (shutterless calibration, TargetIR connectivity, recoil-activated recording and IP68 durability) without a built-in LRF.

AR-platform and lightweight rifle hunters who need a compact, lightweight thermal scope. At 575 grams and 311mm, the TU425SE is the lightest and shortest eyepiece scope in Guide's TU 3.0 line.

Hog and predator hunters working inside 300 meters where the 400 × 300 sensor and 25mm lens provide more than enough detection range for the engagement distances involved.

First-time thermal scope buyers who want a full-featured scope with a 5-year warranty (10 years on the thermal sensor) and US-based service.