Pixfra Sirius S435 Thermal Imaging Monocular - 384x288, 12µm, <18mK NETD, 35mm

The Pixfra Sirius S435 is a slimline thermal imaging monocular that combines advanced performance with a streamlined, ergonomic design. Built around a 384×288, 12µm thermal sensor with an impressive <18mK NETD sensitivity, it is designed to pick up even the smallest heat signatures with remarkable clarity. Paired with a 35mm f1.0 objective lens, the Sirius S435 delivers a detection range of up to 1,800 metres, making it an excellent choice for wildlife observation, conservation work, and general thermal spotting.

Image quality is a real strength of the Sirius S435. Its AI-powered image calibration continuously learns from captured images to optimise performance in changing conditions, while the 50Hz frame rate keeps the view smooth and responsive. A 0.49-inch 1920×1080 OLED display produces a crisp, vivid image that remains comfortable to view over longer sessions, helping to reduce eye fatigue. With 2.41x optical magnification and digital zoom settings of 1x, 2x, 4x, and 8x, it offers the flexibility to observe both nearby and distant targets with confidence.

Pixfra’s signature styling gives the Sirius S435 a refined and practical feel. The monocular features a three-button control layout for simple one-handed operation, along with distinctive design touches such as carbon fibre accents, embossed details on the focus wheel, and an illuminated power button integrated into the Pixfra logo. For more discreet use, the light can be switched off completely. A metal lens cover also adds extra protection against dust, scratches, and knocks in the field.

The Sirius S435 is equally strong on features, with built-in 64GB storage, video recording, snapshot capture, Wi-Fi hotspot connectivity, and hot spot tracking all included as standard. Its quick-release 18650 battery system provides up to 6 hours of runtime, allowing batteries to be swapped quickly when needed. Finished with a robust IP67 waterproof rating, a close focus distance of 3 metres, and a lightweight build of just 421g, the Pixfra Sirius S435 is a highly capable thermal monocular that delivers serious performance in a compact package.

Slimline, ergonomic design for comfortable handling during longer observation sessions
One-handed operation enabled by a simple three-button control layout
AI-powered image calibration that continuously improves image quality across changing conditions
Crystal-clear viewing experience designed to provide a sharp, comfortable image with reduced eye fatigue
Quick-release battery system for fast and easy battery changes in the field
Built-in video recording for capturing observations as they happen
Snapshot function for saving still images instantly
Built-in storage for keeping recorded footage and images directly on the device
Wi-Fi hotspot connectivity for connecting the monocular to compatible devices
Hot spot tracking to help quickly identify the hottest point in view
Multiple colour palettes to tailor the viewing experience to different environments and preferences
Flexible calibration modes to maintain image consistency in varying conditions
Manual focus control for precise image adjustment
Protective metal lens cover to guard against knocks, scratches, and dust
Illuminated logo power button that indicates device status with adjustable brightness settings
Stealth-friendly operation with the option to switch the illuminated logo off completely
Pixfra signature styling with premium design details including embossed elements and carbon fibre accents
Durable, field-ready construction built for dependable use outdoors
Suitable for a wide range of uses including wildlife observation, conservation, and general thermal spotting

Thermal Sensor: 384×288, 12µm, <18mK
Lens: 35mm f1.0
Focus Control: Manual
Close Focus Distance: 3 m (9.84 ft)
Field of View: H
Detection Range: 1,800 m (5,905.31 ft)
Digital Zoom: 1x, 2x, 4x, 8x
Magnification: 2.41x
Frame Rate: 50 Hz
Display: 1920 × 1080, 0.49 inch, OLED
Colour Palettes: 6 (White Hot, Black Hot, Iron Red, Alarm, Amber, Emerald)
Storage: Built-in 64 GB
FFC Calibration: Auto, Manual, External Correction
Hot Spot Trace: Yes
Wi-Fi Hotspot: Yes
Video Recorder: Yes
Snapshot: Yes
Power Source: Replaceable 18650 battery
Battery Life: Up to 6 hours, depending on temperature
Power Supply: 5 VDC / 2 A
Port: USB Type-C
Operating Temperature: –30 °C to +55 °C (–22 °F to +131 °F)
Protection Rating: IP67
Product Dimensions: 194.3 mm × 54 mm × 65.4 mm (7.65″ × 2.13″ × 2.57″) (L × W × H)
Net Weight: 421 g (0.93 lb)

Pixfra Sirius S435 Thermal Imaging Monocular

Pixfra 3 year warranty