Pixfra SIRIUS S435 Thermal Monocular – 384×288, 35 mm, up to 1800 m

Description

The Pixfra SIRIUS S435 is a premium handheld thermal monocular. It combines a very sensitive ≤18 mK sensor with a 384×288 sensor and 35 mm F1.0 lens for a clear, detailed image. A large 0.49″ Full HD OLED display, the PIPS 2.0 image processing system and AI-based image calibration make the image calm and detailed.

Key advantages

• 384×288, ≤18 mK NETD – fine temperature differences remain visible
• 35 mm F1.0 – detection up to 1800 m
• Magnification 3.68×, digital zoom 1×–8×
• 0.49″ 1920 × 1080 OLED – large, comfortable viewing
• PIPS 2.0 + AAIC – noise reduction, contrast and detail enhancement, AI-based calibration
• 64 GB memory and the Pixfra Outdoor app for live view and control
• Quick-change 18650 batteries – more than 7.5 h per battery, two included

Large screen, comfortable viewing

The 0.49-inch 1920 × 1080 OLED display gives a big, bright and sharp image, which reduces eye strain during long observation. The Amber and Jade colour modes are especially gentle on the eyes from dusk to dawn.

One-handed control and fast battery swaps

SIRIUS uses a classic three-button layout designed for reliable one-handed use, and a side power button with five-level brightness indication. The battery cover opens with a simple push for a very quick swap and locks securely back in place. A metal lens cap protects the optics from dust, scratches and knocks.

Technical specifications

Specification	Value
Model	Pixfra SIRIUS S435
Thermal sensor	384×288, 12 μm, ≤18 mK NETD
Lens	35 mm F1.0, manual focus
Optical magnification	3.68×
Digital zoom	1× / 2× / 4× / 8×
Field of view @ 100 m	13.7 × 10.3 m
Detection range	up to 1800 m
Frame rate	50 Hz
Display	OLED, 1920 × 1080, 0.49″
Image processing	PIPS 2.0, AAIC (AI-based adaptive image calibration)
Storage	64 GB built-in
Connectivity	Wi-Fi, USB Type-C, Pixfra Outdoor app
Battery	replaceable 18650 Li-ion, more than 7.5 h; 2 batteries included
Protection	IP67
Operating temperature	approx. −30 to +55 °C
Weight	approx. 421 g
Dimensions	approx. 194.3 × 54 × 65.4 mm
Warranty	3 years (Pixfra)

Compare the SIRIUS range

Model	Sensor	Lens	Detection	Battery
S435 (this model)	384×288	35 mm F1.0	1800 m	>7.5 h
S635	640×512	35 mm F1.0	1800 m	>7.5 h
S650	640×512	50 mm F1.0	2600 m	>6 h
S650D	640×512	25–50 mm F0.9–F1.1	1300 m (25 mm) / 2600 m (50 mm)	>6 h
HD SA50	1280×1024	50 mm F1.0	2600 m	>4.5 h

Who it is for

Hunters and observers who want a powerful handheld monocular with excellent optics and a large, comfortable display.

In the box

• Pixfra SIRIUS S435 thermal monocular
• Battery charger
• 2 × 18650 batteries
• USB cable
• Lens cloth
• Bag strap
• Neck strap
• Wrist strap
• User manual

Package contents may vary slightly between production batches.

Frequently asked questions

When does a dual field of view make sense?

The S650D switches between 25 mm and 50 mm in one body – wide for searching, narrow for detail. The single-lens SIRIUS models are simpler and lighter.

How does SIRIUS differ from ARC?

SIRIUS focuses on maximum image quality and a large Full HD display in a handheld body; ARC PRO/LRF is the compact monocular line, available with a built-in laser rangefinder.

Are spare batteries available?

SIRIUS uses standard 18650 Li-ion cells. Two are included, and the quick-release cover makes swapping in the field easy.

Warranty

Pixfra provides a 3-year manufacturer warranty. Please keep your proof of purchase. Details are in the user manual supplied with the device.

Please note: this information is not legal advice. Rules on owning thermal imaging devices and on using them for hunting or observation differ between countries and regions. It is your responsibility to check and follow the laws that apply where you use the device, including hunting regulations and privacy rules. Use the device only for lawful purposes. Detection ranges are manufacturer figures measured under ideal conditions; real-world performance depends on weather, background and target size. We accept no liability for unlawful or improper use.