The Pixfra Sirius S635 is a slimline thermal monocular that combines advanced imaging performance with a sleek, ergonomic design. Built around a 640×512, 12µm thermal sensor with an impressive <18mK NETD sensitivity, it delivers exceptional image clarity and picks up even the smallest heat signatures with ease. Paired with a 35mm f1.0 objective lens, the Sirius S635 offers a detection range of up to 1,800 metres, making it a superb choice for wildlife observation, conservation work, and long-range scanning.
A native 2.41x magnification gives you a strong optical starting point, while 1x, 2x, 4x and 8x digital zoom settings provide added flexibility when identifying distant objects. Pixfra’s AI-powered image calibration further enhances image quality by learning from captured images, helping to maintain a crisp, detailed view across changing conditions. The result is a thermal monocular that performs with real confidence in the field.
Viewing is equally impressive thanks to the 0.49-inch 1920×1080 OLED display, which produces a vivid, high-contrast image while remaining comfortable over extended periods of use. With a 50Hz refresh rate, six colour palettes, hotspot tracking, video recording, snapshot capture, and 64GB of built-in storage, the Sirius S635 is well equipped for both live observation and saving footage for later review. Wi-Fi hotspot connectivity also makes it easy to link the device with compatible apps and accessories.
In keeping with Pixfra’s signature styling, the Sirius S635 features a refined, modern finish with subtle design touches including carbon fibre accents, embossed detailing, and an illuminated Pixfra logo power button with five brightness settings that can also be switched off completely when discretion is essential. Its three-button control layout keeps operation simple and intuitive, allowing for comfortable one-handed use, while the metal lens cover provides added protection against dust, knocks, and scratches.
Power comes from a replaceable 18650 battery with up to 6 hours of runtime, and the quick-release battery system makes swaps fast and straightforward when you need longer in the field. Compact at just 421g, and backed by a tough IP67-rated housing with an operating range from -30°C to +55°C, the Pixfra Sirius S635 is built to deliver reliable thermal performance in demanding conditions.
