Guide TD635LS Handheld Thermal Imaging Monocular

GUIDE TD635LS HANDHELD THERMAL IMAGING MONOCULAR High-Resolution Thermal Clarity. Precise Laser Ranging. Experience clear, detailed thermal observation with the Guide TD635LS. Built around a high-sensitivity 640 × 512 @ 12 μm infrared detector, 15 mK thermal sensitivity and Guide’s complete ApexVision S1 imaging architecture, it reveals subtle temperature differences in complete darkness and challenging low-contrast conditions. Its 35 mm F1.0 objective lens provides a detection range of up to 1,800 metres, while magnification from 2.03× to 16.24× allows users to examine distant heat signatures in greater detail. The wider 12.5° × 9.4° field of view provides excellent situational awareness across open terrain. An integrated 1,200-metre laser rangefinder provides convenient target-distance measurement directly through the monocular. The TD635LS also features a symmetrical ergonomic body and rear focusing roller designed for comfortable one-handed operation with either hand. A 0.49-inch 1440 × 1080 AMOLED display, 64 GB of internal storage, dual-band Wi-Fi, Bluetooth and photo and video recording with audio complete this capable thermal observation system. A replaceable 18650 battery provides up to ten hours of operation, while the IP67 enclosure supports dependable use in demanding outdoor environments. Get a Quote GUIDE TD635LS KEY FEATURES High-Resolution Thermal Detail The TD635LS combines a 640 × 512 @ 12 μm detector, 15 mK thermal sensitivity and a smooth 50 Hz frame rate. Its high-resolution sensor captures more thermal detail, helping users distinguish people, animals, vehicles and environmental features more clearly. Long-Range Detection and Ranging Its 35 mm F1.0 lens provides thermal detection up to 1,800 metres, while the integrated 1,200-metre laser rangefinder provides convenient and accurate target-distance measurement directly through the monocular. Field-Ready Performance A symmetrical body, one-handed focusing roller, replaceable 18650 battery and up to ten hours of operation support comfortable extended use. IP67 protection, 64 GB storage and dual-band Wi-Fi make the TD635LS suitable for demanding professional and outdoor applications. APEXVISION CLARITY IN EVERY DETAIL The TD635LS is powered by Guide’s complete ApexVision S1 system architecture, combining the ApexCore S1 detector, Nexus 1.0 processing platform and Hyper-Light 2.0 imaging algorithm. Together with its high-resolution 640 × 512 @ 12 μm detector and 15 mK NETD, the system helps reveal subtle temperature differences while enhancing image definition, contrast and fine thermal detail. A smooth 50 Hz frame rate keeps movement clear and responsive, helping users follow moving people, wildlife or vehicles with greater confidence. LONG-RANGE DETECTION WITH PRECISE RANGING The TD635LS combines high-resolution thermal detection and accurate distance measurement in one compact handheld device. Its 35 mm F1.0 objective lens provides a detection range of up to 1,800 metres, with a wide 12.5° × 9.4° field of view and magnification ranging from 2.03× to 16.24×. The integrated laser rangefinder measures target distances at up to 1,200 metres, helping users assess the location of distant heat signatures without switching between separate thermal and ranging devices. ONE-HANDED FOCUSING AND AMBIDEXTROUS CONTROL The TD635LS features a symmetrical ergonomic housing designed for comfortable operation with either the left or right hand. Its rear focusing roller allows users to make fast and precise focus adjustments with one finger, while the streamlined control layout keeps essential functions within easy reach. Manual focusing allows the image to be adjusted for subjects at different distances, while the balanced 465 g body supports stable handheld observation during longer field sessions. The manufacturer describes the TD Gen3 LRF design as ambidextrous and optimised for one-handed use. UPGRADED AMOLED VIEWING The TD635LS features a 0.49-inch AMOLED display with a 1440 × 1080 resolution, presenting high-resolution thermal imagery with strong contrast and clear target detail. The eyepiece provides 20 mm eye relief, dioptre adjustment from −6 to +6 and 13.8× eyepiece zoom, supporting comfortable observation for different users. Seven thermal colour palettes allow the display to be adapted according to the subject, surrounding conditions and user preference: White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot and Sepia. EXTENDED POWER WITH A REPLACEABLE BATTERY A single replaceable 18650 battery provides the TD635LS with up to ten hours of operating time, supporting extended observation without relying on a permanently installed internal battery. The battery can be replaced in the field when additional operating time is required. Its installation system is designed to remain practical in darkness, helping users continue operating without unnecessary interruption. The standard package includes two 18650 batteries and a battery charger, allowing one battery to be prepared while the other powers the monocular. CAPTURE PHOTOS, VIDEO AND AUDIO The TD635LS supports thermal photography and video recording with synchronised audio, allowing users to document observations directly through the monocular. A built-in microphone records audio alongside video, while 64 GB of internal storage provides space for thermal photographs, recordings and operational documentation. Captured content can be retained for later review or transferred to a compatible device, supporting security observation, search and rescue, wildlife monitoring and professional field reporting. DUAL-BAND WI-FI AND TARGETIR CONNECTIVITY The TD635LS supports both 2.4 GHz and 5 GHz Wi-Fi, providing flexible wireless connectivity for transferring captured photographs and videos. Compatible TargetIR application connectivity supports wireless device functions and over-the-air firmware updates, helping users keep the monocular’s software current. Bluetooth connectivity supports compatible wireless accessories, while the USB-C interface provides external power and USB 2.0 data transfer. COMPACT, DURABLE AND FIELD-READY The TD635LS combines a high-resolution thermal detector and integrated laser rangefinder within a compact body measuring 201 × 67 × 88 mm and weighing 465 g. Its IP67 protection rating helps protect the device against dust and water exposure, while an operating-temperature range of −20°C to 50°C supports use across demanding environments. This combination of portability, durability, high-resolution imaging and extended operating time makes the TD635LS well suited to professional security, search and rescue, wildlife monitoring and long-range field observation. Sensor Core technology Full ApexVision S1 system architecture: ApexCore S1 detector + Nexus 1.0 platform + Hyper-Light 2.0 algorithm Detector type Uncooled VOx infrared detector, 8 to 14 μm Resolution 640 × 512 @ 12 μm NETD 15 mK Frame rate 50 Hz Lens Objective lens 35 mm, F1.0 Field of view 12.5° × 9.4° FOV m@100m 22 × 17 m Magnification 2.03× to 16.24× Detection range 1,800 m / 1,950 yd Focus Manual Display Display type 0.49-inch AMOLED Display resolution 1440 × 1080 Colour palettes White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot and Sepia Eye relief 20 mm Dioptre adjustment −6 to +6 Eyepiece zoom 13.8× Hardware Laser rangefinder 1,200 m / 1,300 yd Wi-Fi 2.4 GHz and 5 GHz dual-band Wi-Fi Interface USB-C for external power and USB 2.0 Microphone Built in Bluetooth Yes System Recording function Photo and video recording, with audio included Memory capacity 64 GB Power Battery type Single replaceable 18650 battery Operating time Up to 10 hours Batteries supplied Two 18650 batteries Environmental Operating temp. −20°C to 50°C / −4°F to +122°F Encapsulation IP67 Physical Weight (g/oz) 465 g / 16.4 oz Size (mm/in) 201 × 67 × 88 mm / 7.91 × 2.66 × 3.46 in Standard Device, Wrist strap, Carry bag, Lint-free cloth, USB-A to USB-C cable, Quick-start guide, Warranty card Optional Bluetooth remote control, Quick-charging adapter, USB-C to USB-C cable Upgrade Your Vision Combine high-resolution thermal imaging, long-range detection and precise laser ranging with the Guide TD635LS. DOWNLOADS AND SUPPORT Guide Outdoor Products 2026 Brochure Guide TD635LS Datasheet Get a Quote Please complete the form below to submit your quote request.