Guide TU435S Thermal Scope

The Guide TU435S Thermal Scope is designed for medium- to long-range thermal observation, combining a high-sensitivity 400×300 thermal detector with a 35mm objective lens and Guide's latest ApexVision S1 image processing technology.

Featuring a 400×300 12μm thermal sensor with 15mK NETD thermal sensitivity, the TU435S provides detailed thermal imagery across challenging environmental conditions. Its 35mm objective lens delivers a detection range of up to 1800 metres, making it well suited to users who prioritise longer-range observation.

Guide's ApexVision S1 image processing architecture and Hyper-Light algorithm work together to improve image clarity, contrast and definition, while Shutterless 3.0 technology helps maintain smooth, uninterrupted viewing during use.

With a high-resolution 1920×1080 AMOLED display, 4.4×–17.6× magnification, up to 8 hours of battery operation, Wi-Fi connectivity and an IP68 protection rating, the TU435S offers a robust thermal optic for demanding field conditions.

Includes quick-release scope mount.

ApexVision S1 Image Processing

The TU435S features Guide's ApexVision S1 image processing architecture, designed to enhance thermal image clarity, detail and overall viewing performance.

Advanced processing works alongside the thermal detector to improve image definition and contrast, helping users distinguish heat signatures and surrounding terrain across changing conditions.

This is particularly useful during longer-range observation where retaining image detail becomes increasingly important.

400×300 12μm Thermal Sensor

At the heart of the Guide TU435S is a 400×300 thermal detector with a 12μm pixel pitch.

With 15mK NETD thermal sensitivity, the sensor is capable of detecting subtle temperature differences within a scene, helping maintain useful thermal detail in low-contrast and challenging environmental conditions.

A 50Hz frame rate provides smooth imagery while scanning or observing moving subjects.

35mm Lens & 1800m Detection Range

The TU435S features a 35mm objective lens, giving it stronger longer-range performance than shorter focal-length models in the TU range.

The optical system provides a stated detection range of up to 1800 metres, making the scope particularly well suited to observing across large properties and open terrain.

Its 4.4× base magnification provides a closer initial view of distant subjects, with magnification extending up to 17.6× when additional detail is required.

Medium- to Long-Range Observation

With its 35mm lens and higher base magnification, the TU435S is designed to favour longer-distance observation while still retaining a practical field of view.

Its field of view measures approximately 7.4° × 4.4°, or 13 × 8 metres at 100 metres.

This makes it particularly suitable for users who prioritise detail and detection at distance rather than an extremely wide scanning view.

Hyper-Light Image Processing

Guide's Hyper-Light algorithm is designed to enhance image contrast, reduce unwanted noise and improve finer thermal detail.

Working alongside ApexVision S1 and the high-sensitivity detector, the processing system helps produce a clearer and more defined image across varying field conditions.

Shutterless 3.0 Technology

The TU435S incorporates Guide Shutterless 3.0 technology, designed to reduce the image freezing and audible clicking associated with traditional thermal calibration cycles.

This provides smoother, more continuous viewing during normal operation.

A shutter module is still retained for startup calibration and use in extreme temperature conditions to help maintain image quality.

Ergonomic Focus & Zoom Controls

The TU435S features an ergonomic control arrangement developed around easy access to focus, zoom and commonly used functions.

The focus wheel and zoom controls are positioned for intuitive adjustment in the field, allowing users to quickly fine-tune the image while maintaining a comfortable grip.

1920×1080 AMOLED Display

The Guide TU435S features a 0.49-inch 1920×1080 AMOLED display, providing a clear and detailed view of the thermal image.

Available thermal palettes include White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot and Sepia, allowing the image presentation to be adapted to different environments and viewing preferences.

A -5 to +5 diopter adjustment allows the eyepiece to be fine-tuned for individual eyesight requirements.

Up to 8 Hours Battery Runtime

The TU435S uses a multi-battery system consisting of two built-in 18650 batteries and one external 18650 battery.

The system provides up to 8 hours of operating time, supporting extended observation periods in the field.

USB-C charging and data connectivity provide a convenient option for powering and connecting the device.

Video, Audio & Wi-Fi Connectivity

The Guide TU435S supports video and audio recording, allowing thermal observations to be captured directly through the scope.

Built-in Wi-Fi functionality provides wireless connectivity with compatible external devices for supported viewing, sharing and device functions.

IP68 Weather Protection

With an IP68 protection rating, the TU435S is designed for demanding outdoor environments where exposure to dust, water and changing weather conditions may occur.

Its specified operating temperature range of -20°C to 50°C provides reliable operation across a broad range of climates.

Quick-Release Scope Mount Included

The Guide TU435S includes a quick-release scope mount, providing a convenient mounting solution straight out of the box.

Quick-release mount scope tube torque: less than 2.5N·m / 22.13 in-lb.

Guide TU435S Specifications

Why Choose the Guide TU435S?

The Guide TU435S Thermal Scope is designed for users wanting stronger longer-range performance from the TU 3.0 platform.

Its 400×300 12μm thermal sensor, 15mK NETD sensitivity, 35mm lens and 1800m detection range provide capable thermal observation across larger properties and open terrain, while its 4.4× base magnification provides a closer initial view of distant subjects.

With ApexVision S1 processing, Hyper-Light image enhancement, Shutterless 3.0 technology, a 1920×1080 AMOLED display, up to 8 hours of battery operation, recording functionality, Wi-Fi connectivity, IP68 protection and an included quick-release mount, the TU435S delivers a strong combination of thermal performance, durability and longer-range capability.