• Front right angle of RIX STRIDE ST3 Lite thermal security monocular showing the lens and orange top buttons
  • Rear right view of RIX STRIDE ST3 Lite thermal night vision camera showing the large eye cup and orange power button
  • Left profile of the RIX STRIDE ST3 Lite thermal optic showing the back left diopter focus knob and compact design
  • Underside view of the RIX STRIDE ST3 Lite thermal imaging security camera showing mounting points for helmet attachment.
  • Security guard holding the compact RIX STRIDE ST3 Lite handheld thermal monocular during a night perimeter patrol
  • RIX STRIDE ST3 Lite thermal monocular mounted to a security helmet for hands-free observation and night surveillance
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STRIDE ST3 Lite Helmet Mounted Thermal Imaging Monocular

  • Thermal Resolution: 384 × 288
  • Thermal Lens: 15mm
  • Pixel Interval: 12µm
  • NETD: < 20mK
  • Thermal FOV: 17.5 × 13.1°
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.

R 19,499.00
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SKU: RSTRD03-100-AA10

Detection Range

Pig
Kudu
Elephant
459mDetection
208mRecognition
104mIdentification
688mDetection
313mRecognition
156mIdentification
1376mDetection
625mRecognition
313mIdentification

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

Rix ST3 Thermal Monocular Key Features:

  • 2-in-1 Versatility: Specifically designed for both traditional handheld observation and hands-free, helmet-mounted security operations.
  • Advanced Thermal Sensor: Features a 384x288 resolution core with a 12-micron pixel pitch and an ultra-sensitive sub-20mK NETD for exceptional image clarity in harsh weather.
  • Safe Navigation: Engineered with a minimum 1x magnification, allowing users to walk safely and maintain accurate depth perception while the device is helmet-mounted.
  • Extended Detection Range: The 15mm F1.0 objective lens provides a detection capability of up to 780 meters, ideal for expansive rural perimeter monitoring.
  • Ultra-Lightweight Ergonomics: Weighs just 190g, preventing user fatigue during extended nocturnal patrols.
  • Evidence Recording: Comes equipped with 32GB of built-in memory for onboard photo and video recording, plus Wi-Fi support for remote viewing via the companion app.
  • Reliable Power System: Runs on a single replaceable 18650 battery for up to 4 hours of use, with support for continuous external 5V Type-C power.
  • Field-Ready Durability: IP67 rated to withstand dust, heavy rain, and challenging environments.
Product Overview
Hands-Free Thermal Vision for Professional Security When navigating rough terrain or securing large farm perimeters in total darkness, carrying a bulky handheld optic restricts your movement and reaction time. The STRIDE ST3 Lite Helmet Mounted Thermal Imaging Monocular is purpose-built to solve this exact problem. Designed as a versatile 2-in-1 night detection system, this device easily transitions from a traditional handheld monocular to a fully hands-free, helmet-mounted thermal vision camera. It provides security personnel, anti-poaching units, and rural patrollers with continuous, unimpeded situational awareness while keeping their hands entirely free to operate radios, drive vehicles, or handle specialized equipment.
Ultra-Lightweight & Optimized for Movement Extended foot patrols require gear that won't weigh you down. Weighing an astonishingly light 190g and measuring just 120mm in length, the STRIDE ST3 Lite virtually eliminates neck fatigue during long shifts. Crucially for hands-free operation, the device features a true 1x base magnification. This provides a natural, 1-to-1 field of view, allowing operators to walk, navigate obstacles, and monitor their surroundings comfortably without the disorientation caused by magnified lenses.
High-Clarity Threat Detection Equipped with an advanced 384x288, 12-micron thermal sensor and a sub-20mK NETD rating, the ST3 Lite excels as a human detection security camera. It effortlessly cuts through fog, smoke, and complete darkness to reveal crisp heat signatures. With a detection range of up to 780 meters and a fluid 50Hz frame rate, your security teams can spot trespassers or monitor livestock movements long before a threat breaches the perimeter. The high-contrast 1024x768 OLED display ensures that every detail is presented with absolute clarity.
Rugged, All-Night Reliability Built for the realities of outdoor security, the ST3 Lite features an IP67 waterproof and dustproof rating, ensuring flawless operation in torrential rain and extreme temperatures. The device is powered by a readily available, replaceable 18650 battery that delivers up to 4 hours of continuous runtime, and can be supplemented via a 5V Type-C external power supply for all-night surveillance. Additionally, the built-in Wi-Fi module and 32GB of internal memory allow operators to seamlessly record video and capture photos for crucial incident reporting and evidence collection.

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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 TypeVOx Uncooled
Thermal Resolution384 × 288
Pixel Pitch12 µm
NETD< 20 mK
Thermal Lens15 mm
Focal Ratio (Aperture)F1.0
Field of View17.5 × 13.1
Magnification 1× to 6×
Focus ModeManual Focus
Frame Rate50 Hz
Detection Range (1.7m Subject)780 m
System & Display
Display InfoOLED 1024 × 768
Screen BrightnessYes
Screen ContrastYes
Digital Zoom4x
Color PalettesWhite Hot, Black Hot, Red Hot, Red Monochrome, Green Monochrome, Color, Viridian
Image ModesWeather Mode (Sun / Rain)
Eye Relief20
Diopter Range-5D to +5D
Display FunctionsWeather Mode (Sun/Rain), EIS (Electronic Image Stabilization) status, Auto Image Correction status, Wi-Fi Connection status, Battery Level indicator
Defective Pixel CorrectionYes
Electronic StabilizationYes
Storage Capacity32
Media Capacity32
Media Format.JPEG, .MP4
Recording CapabilitiesVideo Recording, Image Capture
Battery Type18650 (70 mm length)
Battery Life4
Power Supply5 V (Type-C USB)
Power Saving FeaturesAuto Standby
Battery Indicator HUDYes
Polarity ProtectionYes
Overvoltage ProtectionYes
Connectivity & Software
Wi-Fi HotspotSupported
USB ConnectivityUSB Type-C
Supported OSiOS, Android
Software & AnalysisRIX App
Multilingual SupportYes
Android AppDownload App
iOS AppDownload App
Physical & Environmental
Protection Level (IP Rating)IP67
Operating Temperature-20 ℃ to +50 ℃
Storage Temperature -20 ℃ to +50 ℃
Dimensions & Weight 120 × 71 × 47 mm; 190g
Tripod Mounting1/4 inch screw hole and M5 screw holes
EMC CertificationsCE, RoHS
What's in the Box
Box ContentsSTRIDE Series Thermal Imaging Monocular
Battery Charger
USB Type-C Cable
18650 Battery
Lens Cloth, Adapter Kit × 2