• Pixfra Chiron C635 thermal scope front right view, showing the large objective lens, rugged housing, and focus ring.
  • Side profile of the Pixfra Chiron C635 thermal device, highlighting the ergonomic control button layout and durable mounting interface.
  • Front view of the Pixfra Chiron C635 thermal scope, featuring the multi-coated objective lens and protective chassis
  • Side profile of the Pixfra Chiron C635 thermal device, highlighting the Pixfra logo
  • Top down view of the Pixfra Chiron C635, showing the in-line menu button configuration and weather-resistant body
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Pixfra Chiron PFI-C635 LRF Thermal Monocular

  • Thermal Resolution: 640x512
  • Thermal Lens: 50mm
  • Pixel Interval: 12µm
  • NETD: < 20mK
  • Thermal FOV: 12.4x10°
What do these specs mean?

Understanding Thermal Specs

Thermal Resolution

Think of this like a TV screen (e.g., 1280x1024). A higher number means more pixels. More pixels give you a sharper, more detailed image, allowing you to digitally zoom in much further before the image gets blurry or pixelated.

Thermal Lens

Similar to a camera lens, measured in millimeters (e.g., 50mm). A larger lens gathers more thermal energy and "sees" further, giving you a longer detection range. However, larger lenses typically result in a narrower field of view.

Pixel Interval (Pitch)

The physical distance between pixels on the sensor, measured in microns (e.g., 12µm). A smaller number means the pixels are packed tighter together, which produces a crisper image and extends your optical magnification without needing a massive lens.

NETD (Thermal Sensitivity)

Measures how tiny of a temperature difference the device can detect. Lower is better (e.g., < 15mK beats < 25mK). A lower NETD means you get a much clearer picture in terrible weather (rain, thick fog, high humidity) and superior contrast between the animal and its surroundings.

Thermal FOV (Field of View)

How wide of an area you can see at once. A wider FOV is excellent for scanning large areas quickly to spot movement. A narrower FOV usually means the device has higher magnification, perfect for identifying specific targets at long distances.

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Detection Range

Pig
Kudu
Elephant
1059mDetection
694mRecognition
347mIdentification
1588mDetection
1042mRecognition
521mIdentification
3176mDetection
2083mRecognition
1042mIdentification

Understanding the Math

We believe in honest, real-world field specifications.

Detection ranges are calculated by taking the manufacturer's baseline testing and physically scaling it to the average height of the target animal.

Recognition & Identification are calculated using Johnson's Criteria—the military standard for thermal optics. By analyzing the physical properties of the camera's lens and sensor pitch, we calculate exactly when the target will take up enough pixels on your screen to be clearly identified.

Note: High humidity, thick coats, and environmental background temperatures will reduce these maximum optical distances in the field.
Key Features & Highlights

Pixfra Chiron C635 LRF Key Features:

  • Elite 640 x 512 Thermal Sensor: High-resolution imaging with 12µm pixel pitch and <20mK sensitivity for unmatched clarity.
  • Integrated 1,000m Laser Range Finder: Instant distance measurements with ±1m precision for confident target acquisition.
  • Precision Ballistic Calculation: Smart onboard software that calculates trajectory based on real-time range data.
  • Rugged 6,000J Shock Resistance: Built with a premium metal housing designed to handle high-caliber recoil and IP67 environmental protection.
  • Recoil Activated Recording (RAR): Intelligently captures and saves video of the moment of impact.
  • Versatile 3-in-1 Design: Functions as a professional handheld monocular, clip-on attachment, or dedicated scope.
  • Customizable Tactical Interface: Includes 10 reticles, 5 zeroing profiles, and a high-contrast 1440x1080 OLED display.
Product Overview

Elevate your field operations with the Pixfra Chiron PFI-C635 LRF, a professional-grade 3-in-1 thermal powerhouse engineered for those who refuse to compromise on clarity or precision. At its core lies an elite 640x512 thermal sensor with an industry-leading NETD <20mK sensitivity, allowing you to strip away the darkness and identify heat signatures with surgical detail, even in high-contrast or poor weather conditions.

The Chiron is more than just a viewer; it is a complete tactical suite. Featuring an integrated 1,000m Laser Range Finder and an onboard Ballistic Calculator, it instantly computes complex environmental variables to ensure your point of impact is exact. Whether you are using it as a handheld monocular, a front-mounted clip-on, or a dedicated thermal scope, its rugged metal housing is built to absorb the shock of high-caliber rifles (up to 6,000J). With Recoil Activated Recording (RAR) and a vivid OLED display, the Chiron ensures that every critical moment is seen clearly and captured automatically.

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Technical Specifications

While we strive for absolute accuracy, manufacturer specifications and hardware configurations are subject to change without prior notice. For mission-critical applications, we recommend consulting our team to verify current technical data.

Thermal Specifications
Sensor TypeVanadium oxide uncooled focal plane detector
Thermal Resolution640x512
Pixel Pitch12 µm
NETD< 20 mK
Thermal Lens50 mm
Focal Ratio (Aperture)F1.0
Field of View12.4x10
Magnification1.80x
Focus ModeManual Focus
Frame Rate50 Hz
Detection Range (1.7m Subject)1800 m
Precision, Optics & Lasers
LRF Max Range1000 m
LRF Accuracy±1
Freeze CalibrationYes
System & Display
Screen BrightnessYes
Screen ContrastYes
Digital Zoom1x~8x
Color PalettesWhite Hot, Black Hot, Iron Red, Alarm, Emerald, Amber
Flat Field CorrectionAuto; Manual; External Correction
Eye Pupil6
Eye Relief44
Diopter Range–5 D to +5 D
Defective Pixel CorrectionYes
Storage Capacity64
Media Capacity32
Media FormatJPEG, MP4
Recording CapabilitiesVideo Recorder, Image Capture, Audio Recording
Shock-Activated RecordingYes
Built-In MicrophoneYes
Battery Type 18650 battery
Battery Life6.5
Power Supply5 VDC/2 A
Battery Indicator HUDYes
Overvoltage ProtectionYes
Connectivity & Software
Wi-Fi HotspotSupported
Supported OSiOS, Android
Multilingual SupportYes
Android AppDownload App
iOS AppDownload App
Physical & Environmental
Protection Level (IP Rating)IP67
Operating Temperature–30 °C to +55 °C
Storage Temperature–30 °C to +55 °C (
Relative Humidity≤95%
Dimensions & Weight213.4 mm x 65.7 mm x 91.5 mm; 608 g