Guide TD631 LRF

The Guide TD631 LRF is a powerful handheld thermal monocular built for simplicity and performance. Featuring a high-resolution 640 × 480 VOx sensor (12 µm pixel pitch, NETD ≤ 35 mK), it delivers crisp thermal imaging on a sharp 0.23″ AMOLED display (640 × 400 resolution at 50 Hz refresh rate). Its lightweight, ergonomic design includes protective IP66 housing for reliable outdoor use.

This model includes a 35 mm f/1.0 lens with approximately 22 m × 16 m field of view at 100 m. Optical magnification ranges from 1.7x to 13.6x, enabling detection of human-sized targets up to ~1,800 m. The integrated laser rangefinder measures precisely out to 600 m.

About the Guide TD Gen2 LRF Series

The TD Gen2 LRF series combines rugged durability, intuitive controls, and rangefinding capabilities in an affordable handheld format. With fast startup, OTA firmware updates, Wi‑Fi sharing, enhanced imaging algorithms, and long battery performance, the TD631 LRF is purpose-built for outdoor users and recreational professionals.

Key Features

• 640 × 480 VOx thermal sensor, 12 µm pixel pitch; NETD ≤ 35 mK
• 35 mm f/1.0 lens with manual focus
• Field of view at 100 m: approx. 22 m × 16 m
• Optical zoom: 1.7×; digital zoom: up to 18× via eyepiece
• Detection range: up to 1,800 m
• Built-in laser rangefinder: up to 600 m
• Display: 0.23″ AMOLED, 640 × 400, 50 Hz refresh rate
• Color palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eyepiece: 12 mm eye relief; diopter adjustment −4 to +2
• Connectivity: Wi‑Fi (2.4 GHz), USB‑C; supports OTA firmware upgrades
• Smart features: app-based real-time image sharing, new user interface
• Battery: Single replaceable 18650 battery; ~8 hours runtime
• Durability: IP66-rated housing, lightweight at ~399 g; dimensions 153 × 77 × 74 mm

About Guide Sensmart

Guide Sensmart (part of Guide Infrared) is a global thermal imaging leader with over two decades of expertise. Serving users in more than 70 countries, Guide is known for rugged, intuitive optics designed for real-world performance and value.

What’s in the Box

• Guide TD631 LRF Thermal Monocular
• Lens cover and lanyard
• Wrist strap, carry bag, and eye mask
• Battery charger and one 18650 battery
• USB‑C cable
• Quick Start Guide & Warranty Card

Warranty

The TD631 LRF comes with a 2-year manufacturer warranty, backed by Guide’s global support and service network.