Pixfra Sirius S435 Thermal Imaging Monocular
384x288, 12µm, <18mK NETD, 35mm
The Pixfra Sirius S435 is a compact yet powerful thermal imaging monocular built for clear, reliable detection in the field. Featuring a 384×288, 12µm, <18mK thermal sensor, a 35mm f1.0 lens, and a detection range of up to 1,800 metres, it delivers impressive thermal performance in a slim ergonomic body. A 1920×1080 OLED display, AI-powered image calibration, 64GB built-in storage, Wi-Fi connectivity, and a quick-release 18650 battery system make it a versatile and user-friendly choice.
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.
- 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)
- 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
- Pixfra Sirius S435 Thermal Imaging Monocular
What is the Pixfra Sirius S435 used for?
The Pixfra Sirius S435 is designed for thermal observation and is suitable for uses such as wildlife observation, conservation work, and general heat signature detection.
How far can the Sirius S435 detect?
It has a detection range of up to 1,800 metres, allowing it to pick up heat signatures at long distances.
What thermal sensor does it use?
It uses a 384×288, 12µm thermal sensor with a sensitivity of <18mK.
What lens does it have?
The Sirius S435 is fitted with a 35mm f1.0 objective lens.
Does it have zoom?
Yes, it offers 2.41x magnification and digital zoom settings of 1x, 2x, 4x, and 8x.
What is the image quality like?
It features AI-powered image calibration and a 1920×1080 OLED display, which helps deliver clear and detailed thermal images.
Is it comfortable to use for long periods?
Yes, it is designed with an ergonomic slimline body, a simple button layout, and a display intended to reduce eye fatigue during extended use.
Can it be operated with one hand?
Yes, the Sirius S435 has a streamlined three-button layout designed for comfortable one-handed operation.
Does it record video and take photos?
Yes, it includes both video recording and snapshot functions.
Does it have internal storage?
Yes, it has built-in 64GB storage for saving recordings and images.
Can it connect to other devices?
Yes, it features a Wi-Fi hotspot for connectivity.
Does it have different colour palettes?
Yes, it offers 6 colour palettes: white hot, black hot, iron red, alarm, amber, and emerald.
How is the focus adjusted?
The Sirius S435 uses manual focus control.
What is the close focus distance?
It has a close focus distance of 3 metres.
How long does the battery last?
Battery life is up to 6 hours, depending on temperature.
What type of battery does it use?
It uses a replaceable 18650 battery and features a quick-release battery system.
Is it suitable for harsh weather conditions?
Yes, it has an IP67 protection rating and an operating temperature range of –30°C to +55°C.
Does it have a protective lens cover?
Yes, it has a metal lens cover to help protect against dust, scratches, and impacts.
Does the power button light up?
Yes, the power button is integrated into the Pixfra logo and can glow in five brightness settings. It can also be switched off when needed.
How big and heavy is it?
The Sirius S435 measures 194.3 mm × 54 mm × 65.4 mm and weighs 421 g.
- Pixfra 3 year warranty
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