PIXFRA Sirius S635 thermal monocular

High-resolution thermal imaging monocular for detailed observations at medium distances
The PIXFRA Sirius S635 is a compact thermal imaging monocular for demanding observations during the day, at dusk, and at night. With a high-resolution 640 × 512 VOx sensor, fine thermal sensitivity of less than 18 mK, and a 35-mm lens, the model offers a strong combination of detail representation, range, and overview. This makes the device ideal for use in the forest, during stalking, as well as for observations at medium distances.
High-resolution 640 sensor with fine temperature differentiation
At the heart of the PIXFRA Sirius S635 is a modern VOx thermal imaging sensor with 640 × 512 pixels and a pixel size of 12 µm. Thanks to a NETD of under 18 mK, even small temperature differences are reliably visible. This ensures a clear and high-contrast image representation, even in difficult weather conditions or in complex environments. Especially during longer observations in the field, this fine thermal resolution is a significant advantage.
35 mm lens with long range and wide field of view
The built-in 35 mm f1.0 lens allows for a detection distance of up to 1800 meters. At the same time, the device offers a wide field of view of 21.9 × 17.6 m at 100 m. This combination makes the PIXFRA Sirius S635 a versatile all-rounder that provides both overview and very good detail recognition. Thus, the thermal imaging monocular is particularly well suited for applications where quick orientation and precise observation are equally required.
Optimized Image Presentation through PIPS 2.0 and AAIC
For high-quality image output, PIXFRA relies on the PIPS 2.0 firmware with improved zoom, noise reduction, and edge sharpening. This image optimization is complemented by the AI-supported adaptive image calibration AAIC. The system continuously analyzes the image situation and supports a consistently clear presentation. Thus, the reproduction remains reliable and pleasant even under changing conditions.
Compact design for flexible use on the go
Despite its powerful features, the PIXFRA Sirius S635 remains pleasantly compact. With dimensions of 194 × 65 × 54 mm and a weight of only 421 g without accessories, the monocular is easy to transport and can be quickly stored within reach. This makes it ideal for mobile applications where low weight and handy dimensions are particularly important.
Durable and weatherproof in the field
The housing is robustly constructed and protected against dust and water according to IP67. Even in rain, fog, or challenging weather conditions, the device remains reliably operational. The operating range of -30 °C to +55 °C further emphasizes its practicality. Thus, the PIXFRA Sirius S635 is suitable for versatile outdoor applications throughout the year.
Strong features for modern observation
In addition to thermal imaging technology, the monocular offers numerous additional functions for more comfort and overview in use. These include hotspot tracking for quick detection of relevant heat sources, an electronic compass function for better orientation, and Wi-Fi for a stable live stream to mobile devices. Furthermore, 64 GB of internal storage is available for photos and videos.
Long Runtime and Replaceable Batteries
Power is supplied via replaceable 18650 batteries. With a runtime of up to 6 hours per battery, the PIXFRA Sirius S635 remains reliably ready for use even during longer observation phases. Two batteries are already included in the delivery, supporting flexible operation.
Technical Data Overview

Product TypeThermal Imaging Monocular
SensorVOx 640 × 512 pixels / 12 µm / <18 mK
Lens35 mm f1.0
Detection Distanceup to 1800 m
Field of View at 100 m21.9 × 17.6 m
Magnification2.41 to 19.2 times
DisplayOLED, 1920 × 1080 pixels
Frame Rate50 Hz
Storage64 GB internal
FeaturesAAIC, PIPS 2.0, Hotspot Tracking, electronic compass, WLAN
Protection ClassIP67
Battery Type18650 Lithium-Ion
Runtimeup to 6 hours
InterfaceUSB Type C
Operating Temperature-30 °C to +55 °C
Dimensions194 × 65 × 54 mm
Weight421 g

FAQ about the PIXFRA Sirius S635
What applications is the thermal imaging monocular particularly suitable for?
The model is particularly suitable for observations in the forest, for mobile operations during stalking, and for applications at medium distances.

What is the size of the internal storage?
The PIXFRA Sirius S635 has 64 GB of internal storage for photo and video recordings.

Is the device weatherproof?
Yes, with an IP67 protection class, the monocular is protected against dust and water and is designed for demanding weather conditions.

What advantages does AI image calibration offer?
The AAIC technology supports continuously optimized image representation and contributes to consistently clear playback under changing conditions.