Dali S256 II Thermal Monocular

• 640x480 thermal sensor: The high-resolution uncooled FPA sensor gives the Dali S256 II a more detailed thermal image, helping separate animals, people, and background clutter at longer distances.
• 1570 m detection range: Long detection capability makes it easier to scan open ground, field edges, and wider terrain before moving closer for identification.
• 50 Hz refresh rate: A fast image update keeps motion looking smoother, which is especially useful when tracking moving targets or panning across uneven terrain.
• WiFi, photo, and video functions: Wireless connectivity and onboard recording make it practical for sharing observations, reviewing sightings, and documenting hunts or inspections.
• Compact 450 g housing: The light, one-handed format is easier to carry for extended outings and more comfortable for frequent scanning than a heavier thermal device.

About the Dali Thermal Monoculars Series

Dali Thermal Monoculars sit in the brand’s outdoor thermal-imaging range as compact handheld devices built for hunting and outdoor observation. Within this family, the S25X line stands out for combining a uncooled focal-plane-array detector with a feature set aimed at practical field use rather than bench use. The series is designed around fast scanning, one-handed handling, and a simple control layout that suits users who need to move, observe, and recheck heat signatures without carrying a larger optic.

Across the range, Dali equips these monoculars with functions such as Wi-Fi image transmission, photo and video recording, picture-in-picture, hotspot tracking, digital zoom, and multiple color palettes. That combination makes the series useful both for spotting and for documenting what was seen. The S25X family also uses a high-resolution display format intended to present thermal detail clearly during prolonged observation. In practice, these monoculars are aimed at users who want a portable thermal imaging tool for scanning woodland edges, open fields, tracks, and general outdoor routes where fast target detection matters more than a bulky setup.

About the Dali S256 II Thermal Monocular

The Dali S256 II Thermal Monocular is the highest-resolution model in its immediate S25X group, built around a 640x480 uncooled FPA sensor and a 35.00 mm objective lens. That combination gives it a clear advantage when the task is to pick out smaller heat sources or distinguish animals from surrounding vegetation and terrain texture. With a 1570.00 m detection range, it is well suited to scanning larger areas before closing distance, which is exactly how a handheld thermal monocular is most often used in the field.

The optical layout keeps operation straightforward with 1.00 x magnification for natural scanning and a wide 17.70 ° field of view that helps cover ground quickly. A 50.00 Hz refresh rate improves the viewing experience when following movement, while the 1280x960 display presents the thermal image with enough clarity for longer observation sessions. The unit also records photos and video, outputs video, and supports WiFi, so it fits users who want both observation and documentation in one device.

Physically, the S256 II remains easy to carry at 450.00 g and measures 200.00 mm in length, making it practical for one-handed use during patrol, hunting, or general outdoor thermal imaging. Waterproof, fogproof, and shockproof construction adds reassurance in poor weather, while the rechargeable battery and USB-C port simplify charging in the field or from external power sources.

About Dali

DALI traces its origins to the Zhejiang Provincial Testing Technology Research Institute, established in 1984. The company was restructured in 2001 and was listed on the Shenzhen Stock Exchange in February 2008. Based in Hangzhou, Zhejiang, China, DALI focuses on infrared and optoelectronic technologies, including thermal-imaging systems, infrared core components, optoelectronic inertial-navigation products, and more complex integrated optoelectronic systems.

Its expertise is especially relevant in the thermal sector, where the company develops uncooled focal-plane-array detectors and complete infrared imaging systems. In the outdoor market, DALI’s thermal range includes monoculars, riflescopes, and binoculars, while IRtech serves as the professional thermal-imaging brand associated with the company. That background gives products such as the S256 II a clear foundation in in-house thermal imaging development rather than general sporting optics alone.

Main Features

• Magnification: 1.00 x
• Objective lens diameter: 35.00 mm
• Field of view: 154.00 m/1000m
• Field of view (angular): 17.70 °
• Close focus: 1.00 m
• Detection range: 1570.00 m
• Thermal sensor type: Uncooled FPA
• Sensor resolution: 640x480
• NETD: 60.00 mK
• Refresh rate: 50.00 Hz
• Display type: HD
• Display resolution: 1280x960
• Image capture: Yes
• Video recording: Yes
• Video output: Yes
• Connectivity: Wifi
• Built-in rangefinder: No
• Battery life: 4.00 h
• Power supply: Rechargeable Battery, USB-C port
• Working temperature range: -20℃- +50℃
• Length: 200.00 mm
• Width: 71.00 mm
• Height: 71.00 mm
• Weight: 450.00 g
• Waterproof: Yes
• Fogproof: Yes
• Special features: Fogproof, Shockproof, Waterproof

Warranty

2 years. The Dali S256 II Thermal Monocular is covered by a two-year warranty period.