Guide TJ420 LRF

The Guide TJ420 LRF is a robust handheld thermal monocular featuring a 400 × 300 VOx sensor (12 µm pixel pitch) with exceptional sensitivity (NETD ≤ 25 mK). It delivers vivid thermal imagery via a high-definition 0.39″ AMOLED display (1920×1080) at 50 Hz refresh rate, combining clarity with speed.

Equipped with a 25 mm f/1.0 lens, it offers a field of view of approximately 19 m × 14 m at 100 m. The magnification range spans from 3.0× to 12.2×, allowing detailed observation across mid-range distances. A built-in laser rangefinder enables precise distance measurement up to 1,000 m, and it excels at detecting human-sized targets up to 1,300 m. The unit is fully rugged with IP67-rated construction.

About the Guide TJ LRF Series

The TJ LRF lineup is tailored for hunters and outdoor professionals who need high-resolution thermal imaging coupled with accurate rangefinding. With features like fast startup, Wi‑Fi and 5 GHz connectivity, and a long-lasting 12‑hour battery, these devices are designed for reliability and ease of use in field conditions.

Key Features

• 400 × 300 VOx thermal sensor, 12 µm pixel pitch; NETD ≤ 25 mK
• 25 mm f/1.0 lens providing ~19 m × 14 m field of view at 100 m
• Magnification range: ~3.0× to 12.2×
• Detection range: up to ~1,300 m for human-sized targets
• Built-in laser rangefinder accurate to 1,000 m
• Full-HD AMOLED 0.39″ display at 1920×1080 resolution
• Color palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eye relief: 16 mm; Diopter: −6 to +6 dpt; Zoom: up to 18× via eyepiece
• Connectivity: Wi‑Fi (2.4 G & 5 G), USB‑C; includes microphone, compass, gyroscope, Bluetooth
• Recording: Photo/Video with audio on 32 GB internal memory
• Battery: 2× replaceable 18650 cells; ~12 hours runtime
• Durability: IP67-rated, up to −20 °C to +50 °C operating range
• Weight: ~558 g; Dimensions: 234 × 97 × 66 mm

About Guide Sensmart

Guide Sensmart is a global leader in thermal imaging, part of Guide Infrared. With over two decades of innovation and presence in 70+ countries, Guide specializes in high-performance, reliable imaging solutions for outdoor, hunting, and professional applications.

What’s in the Box

• Guide TJ420 LRF Thermal Monocular
• Wrist strap
• Battery charger with 18650 battery × 2
• 5 V/2 A power adapter (US, UK, EU, AU)
• USB‑C cable
• Quick Start Guide & Warranty Card

Warranty

The TJ420 LRF is backed by a 2-year manufacturer warranty, with support available globally through Guide’s authorized service channels.