Guide TD435LS Handheld Thermal Imaging Monocular

The TD435LS 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-sensitivity 400 × 300 @ 12 μm detector and 15 mK NETD, the system helps reveal subtle temperature differences while improving 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 more confidently.

The TD435LS combines long-range thermal detection and accurate distance measurement within one compact handheld device.

Its 35 mm F1.0 objective lens provides a detection range of up to 1,800 metres, with a field of view of 7.9° × 5.9° and magnification ranging from 3.26× to 13.04×.

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.

The TD435LS 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 thermal image to be adjusted for subjects at different distances, while the compact 374 g body helps reduce fatigue during longer observation sessions.

A single replaceable 18650 battery provides the TD435LS with up to ten hours of operating time, supporting extended observation without relying on a permanently installed internal battery.

The removable battery can be replaced in the field when additional operating time is required. Its installation system is designed to remain practical when operating in darkness.

The standard package includes two 18650 batteries and a battery charger, allowing one battery to be prepared while the other powers the monocular.

The TD435LS supports thermal photography and video recording with synchronised audio, allowing users to document observations directly through the monocular.

A built-in microphone captures 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, making the TD435LS useful for security observation, search and rescue, wildlife monitoring and field reporting.

The TD435LS 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 software updates, helping users keep the monocular’s firmware current.

Bluetooth connectivity also supports compatible wireless accessories, while the USB-C interface provides external power and USB 2.0 data transfer.