Guide TB420

The Guide TB 420 Thermal Clip‑On is a lightweight, compact thermal attachment that transforms any daytime riflescope into a high-performance thermal optic. Featuring a 400×300 VOx sensor, sharp AMOLED display, and magnesium alloy housing, the TB 420 delivers reliable detection up to 1300 m (1400 yd) in low-light and adverse weather conditions.

Key Features

• Thermal Sensor: 400×300 VOx uncooled detector, 12 μm pixel pitch
• NETD: <25 mK for crisp image contrast
• Refresh Rate: 50 Hz for smooth target tracking
• Objective Lens: 25 mm, F1.0 with manual focus
• Field of View: 11.0°×8.2° (~19×14 m @100 m)
• Magnification: 1× optical, ~8.9× digital zoom
• Detection Range: 1300 m / 1400 yd
• Display: 0.39″ AMOLED, 1920×1080
• Color Palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Recording: Photo/video with audio; 32 GB internal memory
• Connectivity: Wi‑Fi (2.4/5 GHz), Bluetooth, USB‑C
• Battery: 2× 18650 rechargeable batteries—up to 12 h runtime
• Durability: IP68 waterproof, 1 m drop, 1000 G shock rating
• Weight & Size: 420 g; 128 × 79 × 79 mm

About Guide Sensmart

Guide Sensmart, a subsidiary of Guide Infrared, has been leading thermal optic innovation since 1999. The TB 420 expands their line of compact, rugged clip‑on systems—delivering military-grade performance, intuitive user interface, and reliable field durability at an accessible price point.

What’s in the Box

• Guide TB 420 Thermal Clip‑On
• 2× 18650 rechargeable batteries
• Battery charger with international 5 V/2 A adapters
• USB‑C charging/data cable
• Quick‑start guide & warranty card

Warranty

Covered by a 2‑year limited manufacturer warranty, backed by Guide Sensmart’s dedicated global service centers.