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 lineup — shutterless calibration, IP68 durability, recoil-activated recording, and 12-hour battery life at a sub-$2,000 price point. At just 575 grams, the TU425SE is built for hunters who want proven thermal capability without the bulk or the budget hit of higher-tier models.

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, fog, rain, and smoke, with a thermal detection range of 1,300 meters. Shutterless 3.0 calibration keeps the display live at 50 Hz — no freeze frames during recalibration.

• 25mm F1.0 germanium objective lens — a compact, fast objective that keeps the scope lightweight while delivering a practical 10.3° × 6.2° field of view. The 25mm aperture is optimized for close-to-medium-range hunting where detection range beyond 1,300 meters is rarely needed.

• 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. Instant playback lets you review shots without lowering the rifle.

• 12-hour battery with hot-swap capability — a built-in 18500 rechargeable cell plus an external 18650 bay provide extended runtime with field-swappable power. Standard 18650 cells are available anywhere.

• 575 grams / 20.28 oz — the lightest scope-form-factor thermal in the Guide TU lineup. Compact 311mm overall length fits comfortably on AR-platform rifles and lightweight bolt actions without adding excessive weight forward of the action.

• 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).

Ideal For

Budget-conscious hunters who want the Guide 3.0 platform — shutterless calibration, TargetIR connectivity, recoil-activated recording, and IP68 durability — at the most accessible price in the TU lineup, without paying for an LRF they may not need.

AR-platform and lightweight rifle hunters who need a compact, lightweight thermal scope that won't upset the balance of a lightweight build. At 575 grams and 311mm, the TU425SE is the lightest and shortest traditional-eyepiece thermal scope Guide makes.

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

First-time thermal scope buyers who want a reliable, full-featured entry point into thermal hunting with a 10-year warranty, US-based service, and a clear upgrade path within the Guide ecosystem if they later want LRF or higher resolution.