Guide TK431 Thermal Imaging Monocular

The Guide TK431 is a refined and compact handheld thermal monocular. It features a 400 × 300 VOx thermal sensor (17 µm pixel pitch, NETD ≤ 30 mK) that delivers sharp and high-contrast thermal imaging on a bright 0.4″ FLCOS display (1280×960, 50 Hz refresh rate).

Equipped with a 35 mm f/1.2 lens, it provides a field of view of approximately 19 m × 14 m at 100 m and includes 2.3× optical magnification with up to 8× digital zoom for precise observation. The TK431 supports Wi‑Fi streaming, image/video recording, Picture-in-Picture, and multiple scene modes—all within an IP66-rated, rugged body offering up to 5 hours of battery life.

About the Guide TK Series

The TK  line is designed for handheld flexibility and image clarity. It includes advanced features like adaptive processing for visual clarity in complex conditions, scene-specific presets, and a built-in laser indicator and illuminator for target identification in harsh lighting.

Key Features

• 400 × 300 VOx sensor, 17 µm pixel pitch; NETD ≤ 30 mK
• 35 mm f/1.2 objective lens
• Field of view at 100 m: ≈ 19 m × 14 m
• Optical zoom: 2.3×; Digital zoom: up to 8×
• Display: 0.4″ FLCOS, 1280×960 resolution; 50 Hz refresh
• Recording: Photo & video saving with Wi‑Fi streaming via app
• Features: Picture-in-Picture, laser indicator & illuminator
• Color palettes: Black Hot, White Hot, Red Hot, Iron Hot, Blue Hot, Green Hot
• Battery: Dual 18650 cells; approx. 5 hours runtime
• Durability: IP66 water/dust protection
• Weight: ~490 g; Dimensions: 192 × 65 × 71 mm

About Guide Sensmart

Guide Sensmart (part of Guide Infrared) is a global innovator in thermal imaging, serving a worldwide audience with cutting-edge imaging tools designed for reliability and performance.

What’s in the Box

• Guide TK431 Thermal Monocular
• Power adapter & USB‑C cable
• Micro HDMI cable
• Lens cap
• Wrist strap & carry case
• Quick Start Guide & Warranty Card

Warranty

The TK431 includes a 2‑year device warranty, backed by Guide’s international service network.