ATN OTS 4T 640 4-40x

• 640x480 thermal sensor: The higher-resolution sensor gives the monocular more detail to work with at distance, helping separate animals, people, and background clutter more clearly during scanning and identification.
• 4-40x magnification range: A 4x base view is useful for deliberate observation, while the extended digital zoom range lets the user inspect distant heat signatures without changing devices.
• 3300 m detection range: Long detection capability makes this model suitable for wide-area observation, open-country spotting, search work, and early target discovery before closing distance.
• Obsidian IV Smart HD platform: ATN’s processing system supports features such as video recording, Wi-Fi connectivity, Smart Range Finder, and onboard sensors, turning the monocular into a more versatile field tool.
• 16 h Li-ion battery life: Long runtime reduces the need for power management during extended outings, night hunts, patrols, or observation sessions.

About the ATN OTS 4T Series

The ATN OTS 4T series is a family of handheld Smart HD thermal monoculars built for users who need thermal observation rather than a weapon-mounted sight. Within ATN’s thermal lineup, the series sits as a versatile spotting platform for hunting, stalking, game recovery, and search-and-rescue, combining a compact handheld format with the digital functions of the company’s Obsidian 4T system. A defining part of the series is the Obsidian IV Dual Core T processor, paired with a 1280 × 720 HD microdisplay, which gives the OTS 4T models their Smart HD operating style and supports features beyond simple viewing.

The range includes models with 384 × 288 and 640 × 480 Gen 4 thermal sensors, allowing users to choose between different levels of image detail and magnification ranges. Across the series, ATN equips the OTS 4T with practical digital tools such as Wi-Fi video streaming, onboard video recording, an electronic compass, and a Smart Range Finder. That makes the series well suited to users who want to observe, document, and share what they see in the field. The OTS 4T design focuses on handheld thermal detection with enough processing power and connectivity to support longer, more methodical observation sessions.

About the ATN OTS 4T 640 4-40x

The ATN OTS 4T 640 4-40x is the long-range, high-magnification version of the series, built for users who prioritize distant detection and close inspection of heat sources. Its 640x480 thermal sensor gives the device a stronger information base for identifying shapes and thermal contrast than lower-resolution alternatives, which matters when scanning large fields, open hillsides, or broad search areas. Combined with a stated 3300.00 m detection range, this model is aimed at observation tasks where early detection is more important than fast close-range scanning.

The 4.00 x to 40.00 x magnification range gives the monocular a more deliberate viewing style. At the lower end it is suitable for structured observation from a fixed position, while the higher end helps inspect a distant heat signature in more detail once it has been found. The 1280x720 Micro - HD display supports a clear viewing image inside the eyepiece, and the 60.00 Hz refresh rate helps motion appear smoother when tracking moving animals or people.

ATN also builds this model around field practicality rather than image generation alone. Video recording and Wifi connectivity allow footage sharing and remote viewing functions, while the internal Li-ion battery with 16.00 h battery life supports extended use without frequent charging breaks. At 900.00 g and 260.00 mm long, it remains a substantial handheld thermal monocular, but that size also reflects its emphasis on reach, runtime, and observation capability. Waterproof and fogproof construction further suits it to night hunting, wildlife observation, and professional thermal spotting in difficult weather.

About ATN

ATN was founded in 1995 in Silicon Valley, California, and the company is now headquartered in Doral, Florida. It focuses on night-vision, thermal-imaging, and digital day-and-night optics, covering traditional image-intensifier devices as well as newer digital systems. That mix of product categories is important in ATN’s current identity, because the company has spent years developing optics that combine imaging hardware with onboard electronics and recording functions.

ATN’s product history includes the X-Sight II HD digital day-and-night sight series introduced in 2015, followed by products built around the Obsidian 4 Dual Core platform introduced in 2018. Its lineup also includes thermal products such as the ThOR LT series introduced in 2020. In this category, ATN is known for combining thermal sensors with digital processing, onboard recording, wireless connectivity, and app-based functions in devices intended for hunting, observation, and low-light field use.

Main Features

• Product type: Thermal monocular
• Series: ATN OTS 4T
• Magnification: 4.00 x - 40.00 x
• Field of view: 145.00 m/1000m
• Field of view (degrees): 8.30 °
• Eye relief: 25.00 mm
• Detection range: 3300.00 m
• Thermal sensor resolution: 640x480
• Thermal sensor pixel count: 0.31 MP
• Refresh rate: 60.00 Hz
• Display type: Micro - HD
• Display resolution: 1280x720
• Display pixel count: 0.92 MP
• Video recording: Yes
• Video resolution: 1280x960
• Video output: Yes
• Connectivity: Wifi
• Built-in rangefinder: No
• Power supply: Li-ion
• Battery life: 16.00 h
• Dimensions: 260.00 mm x 80.00 mm x 75.00 mm
• Weight: 900.00 g
• Waterproof: Yes
• Fogproof: Yes
• Colour: Black

Warranty

ATN covers the OTS 4T 640 4-40x with a 3-year warranty. This gives the thermal monocular a clearly stated manufacturer warranty period for long-term ownership and regular field use.

In the Box

• Lens tissue
• USB-C cable
• Soft carrying case