Guide TD431

The Guide TD431 is a powerful thermal monocular from the Gen2 lineup, designed for accurate mid- to long-range observation. Equipped with a 384×288 VOx sensor (12 µm pixel pitch) and excellent sensitivity (NETD ≤ 35 mK), it delivers clear thermal imagery to a high‑contrast 0.23″ AMOLED display (640×400) at a smooth 50 Hz refresh rate.

Its 35 mm f/1.0 objective lens provides a field of view of approximately 13 m × 10 m at 100 m, ideal for detailed scanning. The optical magnification ranges from 2.6× to 10.4×, supporting detection out to ~1,800 m. This makes the TD431 well-suited for extended-range wildlife observation, terrain mapping, or patrol use without complicating features.

About the Guide TD Gen2 Series

The TD Gen2 family blends rugged durability and user customization, offering long battery life and IP66-rated protection. With an intuitive user interface, multiple thermal palettes, Picture-in-Picture zoom options, and app connectivity, these devices are built for dependable use in diverse outdoor conditions.

Key Features

• Sensor: 384×288 VOx with 12 µm pixel pitch; NETD ≤ 35 mK
• Lens: 35 mm f/1.0 objective
• Field of view at 100 m: approx. 13 m × 10 m
• Magnification: 2.6×–10.4× optical zoom
• Detection range: up to 1,800 m
• Display: 0.23″ AMOLED, 640×400 resolution; 50 Hz refresh
• Color palettes: Black Hot, White Hot, Red Hot, Iron Hot, Blue Hot
• Eyepiece: 12 mm eye relief; diopter −4 to +2; 18× digital zoom
• Connectivity: Wi‑Fi 2.4 GHz and USB-C interface
• Power: single 18650 battery, ~10 hours runtime
• Housing: IP66 rated, shock‑resistant; tripod mount compatible
• Weight: approx. 345 g; Dimensions: 150 × 49 × 74 mm

About Guide Sensmart

Guide Sensmart is a renowned manufacturer of infrared thermal imaging systems and a division of Guide Infrared (China). With decades of research and development, Guide serves over 70 countries, offering high-quality thermal optics that balance performance, innovation, and affordability.

What’s in the Box

• Guide TD431 Thermal Monocular
• Lens cover and lanyard
• Wrist strap
• Carry bag
• Eye mask
• Battery charger with 18650 battery
• USB Type‑C cable
• Quick use guide
• Warranty card

Warranty

The TD431 is covered by a 2‑year manufacturer warranty, with professional service available through Guide’s internationally authorized partners.