Guide TD431 LRF

The Guide TD431 LRF is a high-performance thermal monocular equipped with a 35 mm f/1.0 objective lens, a sensitive 384×288 VOx sensor (12 μm pixel pitch), and a built-in 600 m laser rangefinder. It combines powerful long-range detection with accurate distance measurement, making it ideal for demanding outdoor observation tasks.

The TD431 LRF delivers a field of view of approximately 13 m × 10 m at 100 m, with a magnification range of 2.6× to 10.4×. It detects human-sized targets up to 1,800 m away and displays thermal images on a bright 0.23″ AMOLED screen with 640×400 resolution at 50 Hz for smooth viewing.

About the Guide TD Gen2 LRF Series

Designed for users who need reliable rangefinding and image performance in one device, the Guide TD Gen2 LRF series offers intuitive controls, fast startup, advanced observation modes, and rugged durability. With wireless connectivity, customizable palettes, and up to 10 hours of battery life, these devices are built for real-world use in any condition.

Key Features

• 384×288 VOx sensor, 12 μm pixel pitch, NETD ≤ 35 mK
• 35 mm f/1.0 manual-focus lens
• Field of view at 100 m: approx. 13 m × 10 m
• Magnification: 2.6× to 10.4×
• Detection range: up to 1,800 m
• Laser rangefinder: accurate up to 600 m
• Display: 0.23″ AMOLED, 640×400 resolution, 50 Hz refresh rate
• Color palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eyepiece: 12 mm eye relief, −4 to +2 diopter adjustment
• Connectivity: Wi‑Fi (2.4 GHz) and USB‑C
• Battery: Replaceable 18650 battery with up to 10 hours operation
• Housing: IP66 waterproof and dustproof
• Weight: 393 g; Dimensions: 150 × 77 × 74 mm

About Guide Sensmart

Guide Sensmart is a global leader in the thermal imaging industry. A division of Guide Infrared, the company provides reliable and innovative thermal optics to users in over 70 countries, offering cutting-edge performance, durable construction, and exceptional value.

What’s in the Box

• Guide TD431 LRF Thermal Monocular
• Lens cover and lanyard
• Wrist strap
• Carry bag and eye mask
• Battery charger
• 18650 rechargeable battery
• USB‑C cable
• Quick start guide and warranty card

Warranty

The Guide TD431 LRF is backed by a 3-year manufacturer warranty and supported by an international service network for peace of mind and long-term reliability.