Guide TD435S

• 400×300 Thermal Sensor with 15 mK NETD: The 12 μm pixel pitch detector delivers a low Noise Equivalent Temperature Difference of 15 mK, the same sensitivity used in Guide's higher-resolution TD Gen3 models, producing clean, low-noise thermal images even in complete darkness.
• Ambidextrous, One-Handed Operation: The symmetrical housing and ergonomically placed controls allow comfortable use with either hand, while the mini focusing roller lets the user fine-tune focus with a single finger without breaking observation.
• 0.49" AMOLED Display (1440×1080): The enlarged, high-resolution display renders more detail and contrast than earlier-generation screens, making it easier to identify targets during long observation sessions.
• 64 GB Built-In Storage with Smart Recording: Photo and video capture with synchronized audio is stored directly on the device, with enough onboard capacity for well over 100,000 images, reducing the need for frequent file transfers in the field.
• 10-Hour Runtime on a Replaceable 18650 Battery: The battery can be swapped blindly in the dark, without needing to check polarity, keeping the monocular running through a full day of stalking or observation.

ABOUT THE TD GEN3 SERIES

The TD Gen3 Series is Guide's current generation of handheld thermal imaging monoculars, designed as a compact, easy-to-carry option for hunters, outdoor enthusiasts, and field observers. The series spans several models, from entry-level detectors up to high-sensitivity 640×512 sensors, paired with 35 mm or 50 mm lens options to suit different detection-range requirements.

Every model in the series shares the same core design: a 12 μm uncooled VOx infrared detector, a 0.49" AMOLED display with 1440×1080 resolution, and a symmetrical, ambidextrous housing that supports genuine one-handed use. A mini focusing roller allows fast, precise focus adjustment with a single finger, while a replaceable 18650 battery provides roughly 10 hours of continuous runtime and can be installed in the dark without needing to identify the terminals.

Connectivity across the series is built around dual-band Wi-Fi (2.4 GHz/5 GHz) and Bluetooth, allowing users to pair the device with a companion app for image transfer and remote control. Smart recording with audio, combined with up to 64 GB of internal storage, lets users document observations without carrying separate recording equipment. An IP67-rated housing and an operating range of -20°C to 50°C keep the series usable across a wide range of seasonal and climate conditions, while seven selectable color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia) give users flexibility in adapting the thermal image to different backgrounds and lighting conditions.

ABOUT THE MODEL (GUIDE TD435S)

The Guide TD435S is one of the more compact and lightweight models in the TD Gen3 lineup, built around a 400×300 uncooled VOx infrared detector with a 12 μm pixel pitch and a 15 mK NETD rating, paired with a 35 mm, F1.0 objective lens. This combination keeps the unit's weight down to 355 g and its length to 159 mm, making it an easy monocular to carry for extended periods on a hand strap or neck strap during hikes, stalking, or general outdoor observation.

Despite its smaller sensor format, the TD435S uses the same 15 mK NETD detector performance found in the series' higher-resolution models, rather than the higher-noise sensor used in the more basic TD433. This gives it noticeably cleaner, more detailed thermal images than an entry-level unit, while keeping weight and cost lower than the 640×512 models such as the TD650S or TD635S. Its 3.26x–13.04x magnification range and 1800 m / 1950 yd detection range make it well suited to close- and mid-range observation, such as checking a field edge, tracking movement along a tree line, or scanning terrain during a walked stalk.

Images are shown on a 0.49" AMOLED display with 1440×1080 resolution and a 20 mm eye relief, with seven selectable color palettes (White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, and Sepia) and a manual focus ring for precise adjustment at different distances. Photo and video capture with synchronized audio is supported, backed by 64 GB of internal storage, and dual-band Wi-Fi (2.4 GHz/5 GHz) connects the device to the companion app, while a built-in microphone and Bluetooth support additional connectivity.

Power comes from a single, replaceable 18650 battery, providing up to 10 hours of operating time, while the IP67-rated housing and an operating range of -20°C to 50°C make the TD435S a practical, dependable choice for hunters and outdoor users who want thermal observation without the added bulk and weight of a larger-sensor unit.

ABOUT GUIDE

Guide (Guide Sensmart Tech Co.) is a Chinese manufacturer specializing in infrared and thermal imaging technology, operating as a subsidiary of Wuhan Guide Infrared Co. Founded in 2016, the company focuses on the design and production of commercial infrared sensors and thermal imaging devices. More information about the manufacturer is available on the Guide brand page.

Guide's product range spans thermal monoculars, thermal binoculars, digital night vision devices, riflescopes, and thermal clip-on attachments developed for hunting, outdoor observation, search and rescue, and security applications. The company applies its own infrared detector and imaging processing technology across its product lines, aiming to make thermal imaging accessible to a broad range of outdoor and professional users.

MAIN FEATURES

• Core Technology: ApexVision S1 system architecture (ApexCore S1 detector + Platform Nexus 1.0 + Algorithm Hyper-Light 2.0)
• Sensor Type: Uncooled VOx Infrared Detector, 8–14 μm
• Resolution: 400×300 px
• Pixel Pitch: 12 μm
• NETD: 15 mK
• Frame Rate: 50 Hz
• Objective Lens: 35 mm, F1.0
• Magnification: 3.26x–13.04x
• Field of View: 7.9° × 5.9°
• Field of View at 100 m: 14 × 10 m
• Detection Range: 1800 m / 1950 yd
• Focus: Manual
• Display: 0.49" AMOLED, 1440×1080 px
• Color Palettes: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia
• Eye Relief: 20 mm
• Diopter Adjustment: -6 to +6
• Wi-Fi: 2.4 GHz / 5 GHz
• Interface: USB-C
• Additional Connectivity: Microphone, Bluetooth
• Recording: Photo/Video with audio
• Internal Storage: 64 GB
• Battery: Single, replaceable 18650 battery, up to 10 hours
• Operating Temperature: -20°C to 50°C
• Waterproof Rating: IP67
• Weight: 355 g
• Dimensions: 159 × 54 × 74 mm

WARRANTY

The Guide TD435S thermal imaging monocular is covered by a 2-year warranty.

IN THE BOX

• Guide TD435S Thermal Imaging Monocular
• Hand Strap
• Neck Strap
• Carry Bag
• Lint-Free Cloth
• Battery Charger
• 18650 Battery ×2
• 5V 2A Adapter
• USB-A to USB-C Cable
• Quick Start Guide
• Warranty Card