Guide TD435LS Thermal Monocular with LRF

The Guide TD435LS Thermal Monocular with LRF combines high-sensitivity thermal imaging, long-range detection and integrated laser rangefinding in a compact handheld platform designed for demanding outdoor observation.

Featuring a 400×300 12μm thermal detector with 15mK NETD thermal sensitivity, the TD435LS is paired with a 35mm objective lens and provides a detection range of up to 1800 metres. Its 3.26× base magnification makes it particularly well suited to observing subjects at greater distances.

An integrated 1200m laser rangefinder (LRF) provides accurate distance measurement directly through the monocular, while Guide's ApexVision S1 image processing technology works to enhance thermal image clarity and detail.

With a high-resolution 1440×1080 AMOLED display, up to 10 hours of battery operation, Wi-Fi connectivity, video and audio recording and IP67 protection, the TD435LS provides a versatile thermal observation solution for hunting, wildlife observation, property monitoring, search and rescue and outdoor applications.

ApexVision S1 Image Processing

The TD435LS incorporates Guide's ApexVision S1 image processing architecture, designed to enhance thermal image clarity, detail and overall viewing performance.

Advanced processing works alongside the high-sensitivity thermal detector to improve image definition and provide smooth thermal imagery across varying environmental conditions.

This helps maintain useful target and terrain detail when observing in darkness, poor visibility or conditions with reduced thermal contrast.

400×300 12μm Thermal Sensor

At the heart of the Guide TD435LS is a 400×300 thermal detector with a 12μm pixel pitch.

Combined with 15mK NETD thermal sensitivity, the sensor is capable of detecting subtle temperature differences within a scene, helping provide clear thermal imagery in challenging field conditions.

A 50Hz frame rate keeps the image smooth while scanning terrain or observing moving subjects.

35mm Lens & 1800m Detection Range

The TD435LS features a 35mm objective lens designed to provide strong longer-range observation performance.

Combined with its 400×300 thermal sensor, the optical system provides a stated detection range of up to 1800 metres, making the monocular particularly capable when scanning open terrain and locating distant heat signatures.

The 3.26× base magnification provides a closer initial view than wider-field thermal monoculars, while magnification can be increased up to 13.04× when additional detail is required.

Integrated 1200m Laser Rangefinder

The built-in laser rangefinder provides distance measurement out to 1200 metres, allowing users to determine the range to an observed subject without requiring a separate handheld rangefinder.

Integrating thermal observation and ranging into a single device provides valuable additional information when judging distances across open terrain, particularly during low-light or night-time observation.

Ambidextrous One-Handed Design

The TD435LS features a symmetrical, ambidextrous housing, providing comfortable operation for both left- and right-handed users.

Its ergonomic control arrangement is designed for convenient one-handed operation, allowing commonly used functions to be accessed while maintaining a secure grip on the monocular.

Fingertip Focus Control

A compact focusing roller provides quick and precise focus adjustment using a simple finger movement.

This allows the image to be fine-tuned while maintaining a natural grip, making it easier to transition between subjects at different distances during active scanning.

1440×1080 AMOLED Display

The Guide TD435LS features a large 0.49-inch 1440×1080 AMOLED display, providing a high-resolution view of the thermal image.

Multiple thermal colour palettes are available, including 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 -6 to +6 diopter adjustment provides additional flexibility to suit individual users.

Up to 10 Hours Battery Runtime

The TD435LS is powered by a single replaceable 18650 rechargeable battery, providing up to 10 hours of operating time.

The replaceable battery system provides additional flexibility for extended field use, as compatible spare batteries can be carried when longer operating periods are required.

The monocular also supports USB-C power, providing a convenient external power option.

Video, Audio & Wi-Fi Connectivity

The Guide TD435LS supports video and audio recording, allowing thermal observations to be captured directly through the monocular.

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

IP67 Weather Protection

With an IP67 protection rating, the TD435LS is designed for use in demanding outdoor environments where exposure to dust, moisture 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 environmental conditions.

Guide TD435LS Specifications

Why Choose the Guide TD435LS?

The Guide TD435LS Thermal Monocular with LRF is designed for users who prioritise longer-range thermal observation and integrated distance measurement in a compact handheld unit.

Its 400×300 12μm sensor, 15mK NETD sensitivity, 35mm lens and 1800m detection range provide capable thermal performance at distance, while the 3.26× base magnification provides a closer initial view of distant subjects.

Combined with a 1200m laser rangefinder, ApexVision S1 processing, 1440×1080 AMOLED display, up to 10 hours of battery operation, replaceable 18650 battery, recording functionality, Wi-Fi connectivity and IP67 protection, the TD435LS provides a capable package for demanding field observation.