Description
Compact Thermal Imaging Sight for Lightweight Platforms
The SIEGE-S213 is a miniature thermal imaging sight that integrates a high-performance 256×192 uncooled infrared detector, a 13 mm F0.9 objective lens and a 1.6″ 360×320 touchscreen into a rugged housing weighing only 99 g (without battery). It delivers smooth, clear thermal imagery for portable observation and equipment integration where size, weight and reliability are critical.
Unlike a bare thermal camera core, the SIEGE-S213 is a complete, ready-to-deploy sighting device: optics, detector, image processing, display, reticle, zeroing and mounting interface are all engineered as one system.
Key Features
- 256×192 high-sensitivity thermal imaging — clean, fluent infrared imagery with a 13.5° × 10.1° field of view.
- Ultra-lightweight 99 g design — 53 × 42 × 43 mm housing that integrates flexibly with compact equipment and portable devices.
- Electronic zeroing — adjust the impact point with up/down/left/right controls, with freeze-frame support for precise alignment.
- Multiple reticle options — switchable reticle styles with adjustable size and colour (white, black, green, blue, red).
- Five image palettes — White Hot, Black Hot, Green Hot, Red Hot and Iron Red, with per-palette enable/disable control.
- Hotspot tracking — automatically highlights the hottest point in the scene.
- Anti-burn protection — protects the detector when strong heat sources are present.
- Image enhancement and adjustment — contrast, image brightness, reticle brightness and screen brightness controls.
- Photo and video recording — short press to capture a photo, long press to record or stop video.
- Touchscreen operation — long press for the menu, swipe up/down to change reticle size/colour, swipe left-right to change palette, double tap to zoom.
- ≥8 hours runtime — dual 16280 lithium batteries, with Type-C 5 V external power support.
- Rugged environmental performance — 1000 g shock resistance and -20 °C to +50 °C operating range.
Technical Specifications
| Detector resolution | 256 × 192 |
|---|---|
| Objective lens | 13 mm F0.9 |
| Field of view (H × V) | 13.5° × 10.1° |
| Display | 1.6″, 360 × 320 touchscreen |
| Image polarity (palettes) | White Hot / Black Hot / Green Hot / Red Hot / Iron Red |
| Battery | 16280 × 2 |
| Runtime | ≥ 8 hours (dual battery) |
| External power | Type-C, 5 V |
| Operating temperature | -20 °C ~ +50 °C |
| Shock resistance | 1000 g |
| Weight | 99 g (without battery) |
| Dimensions | 53 × 42 × 43 mm |
| Language support | English / Chinese / Russian |
Optics and Field of View
The 13 mm F0.9 germanium objective paired with a 256×192 detector provides a 13.5° × 10.1° field of view — wide enough for rapid situational awareness at close to medium range, while keeping the complete optical assembly small and light enough for compact platforms.
Reticle, Zeroing and On-Screen Menu
Zeroing is performed entirely on screen: enter the zeroing menu, adjust the impact point with the directional controls, and freeze the image to confirm alignment. Reticle size and colour can be changed directly from the main screen with a swipe, and the menu provides contrast, image/reticle/screen brightness, theme, date and time, auto power-off, language and factory reset.
Image Palettes
Five palettes cover different viewing conditions and personal preferences. Each palette can be individually enabled or disabled in the palette menu, so only the modes you need appear in the quick-switch rotation.
Mounting Options
The SIEGE-S213 ships with a standard RMR footprint base, making it compatible with a large ecosystem of mounts. Optional accessories include: 90° side-flip picatinny mount, 45° picatinny mount, integrated quick-release picatinny mount and RMSc base.
Recommended screw torque: 15–20 ft-lb.
In the Box (Standard Configuration)
- Main unit × 1
- RMR base × 1
- M3×8 countersunk hex screws × 4
- Hex wrench × 1
- 16280 flat-top lithium batteries × 2
- Type-C data cable × 1
- Charger × 1
- Lens cloth × 1
- User manual × 1
- Certificate of conformity × 1
Applications
- Portable thermal observation and reconnaissance
- Weapon-mounted thermal vision for law enforcement and security
- Wildlife observation and outdoor night operations
- OEM/ODM integration into compact optronic platforms
OEM / ODM Support
As a manufacturer of uncooled infrared thermal imaging modules, ERDI supports OEM and ODM cooperation covering optical configuration, mechanical adaptation, interface requirements, firmware options and volume supply. Please contact our engineers with your project requirements.
Frequently Asked Questions
What is the detection range?
Detection range depends on target size, thermal contrast and environmental conditions. Our engineers can recommend the most suitable configuration for your required distance.
Does it work in complete darkness?
Yes. Thermal imaging detects infrared radiation emitted by objects, so the SIEGE-S213 works in complete darkness as well as in daylight.
Can the reticle be changed?
Yes. Reticle style, size and colour are all adjustable, with multiple colour options available.
Is a picatinny mount included?
A standard RMR footprint base is included. Picatinny and RMSc mounting options are available as optional accessories.
Is this product available for OEM projects?
Yes. ERDI supports OEM/ODM customization. Please contact us with your requirements.
Request a Quotation
We do not publish fixed prices for our products — every project has different optical, mechanical and volume requirements. Please contact our team with your application details and we will provide a tailored quotation and technical proposal.
