The Thermtec WILD 635 is a powerful thermal imaging monocular for observation in dusk and darkness –
designed for a clean overall package of sensor performance, image stability, and practical operation. The combination of a 35 mm lens,
640 × 512 VOx sensor (12 µm), and 50 Hz aims for a detailed image that does not "judder" even during movement.
For documentation, the device comes with 64 GB of internal memory for photos/videos. Additionally, it features functions such as
PIP, hot spot marking, AI rangefinding, and AI object recognition
(manufacturer's specifications). The rubberized magnesium housing with IP67 rating is clearly designed for outdoor use.
Key Features
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Sensor: 640 × 512 VOx, 12 µm pixel size
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Lens: 35 mm, F0.9
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NETD: ≤ 18 mK (manufacturer's specification)
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Frame Rate: 50 Hz
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Display: AMOLED, 1024 × 768
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Field of View: approx. 12.5° × 10.0° (approx. 22.0 m at 100 m)
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Magnification: 2.0× optical, 1×–4× stepless digital zoom
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Functions: PIP, hot spot marking, 6 color palettes
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Storage: 64 GB internal, photo & video + playback
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Battery: Removable 18650 battery system, approx. 8 h per battery (manufacturer's specification)
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Protection Class: IP67
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Operation: Joystick + rocker, one-handed use (manufacturer's specification)
Our Assessment – from a Trainer & User Perspective
The WILD 635 is clearly trimmed for "image quality under real conditions" based on its datasheet: a 640 sensor, 50 Hz, and a fast F0.9 system
are precisely the ingredients that make a difference outdoors – not just for the "wow moment," but when observing for long periods and the image
needs to remain stable. The joystick/rocker control is useful for this, as one-handed use on handheld devices makes the difference between
actually using functions or just having them "on paper" (manufacturer's specification).
Concrete practical added value: 22 m field of view width at 100 m means you see about 11 m
to the left/right of the image center – this helps if you want to "find" quickly before examining details. And regarding NETD classification: ≤ 18 mK
(manufacturer's specification) simply describes how finely temperature differences can be separated in the image – the lower the value, the more
likely you are to see small contrasts in difficult conditions (e.g., warm animal against a warm background). For zoom, the honest trade-off applies:
2.0× optical provides a clean basis, digital zoom magnifies details but does not "magically" create
additional sensor resolution – for best performance, digital zoom is usually used selectively when the target is already securely in the image.
Features & Operation
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AI image calibration for stable display (manufacturer's specification)
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Stepless digital zoom 1×–4×
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PIP (Picture-in-Picture) for detailed view with simultaneous overview
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Hot spot marking for quick orientation in the image
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6 color palettes for adaptation to surroundings and personal preference
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Photo & Video with playback directly on the device
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Removable 18650 battery system for long missions (manufacturer's specification)
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Hand strap system for right- & left-handers (manufacturer's specification)
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USB 5 V external power supply
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Hotspot App / Live transmission (manufacturer's specification)
Technical Data
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Model: Thermtec WILD 635
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Lens Diameter: 35 mm
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Lens System: F0.9
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Sensor Resolution: 640 × 512 pixels (VOx)
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Pixel Size: 12 µm
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NETD System Performance: ≤ 18 mK (manufacturer's specification)
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Frame Rate: 50 Hz
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Display: AMOLED, 1024 × 768 pixels
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Field of View: approx. 12.5° × 10.0°
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Field of View Width at 100 m: approx. 22.0 m
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Optical Magnification: 2.0×
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Digital Zoom: 1×–4× stepless
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Detection Distance (Deer): approx. 1800 m (manufacturer's specification)
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Recognition Distance (Deer): approx. 600 m (manufacturer's specification)
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Color Palettes: 6
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PIP Function: yes
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Hot Spot Marking: yes
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AI Rangefinding: yes (manufacturer's specification)
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AI Object Recognition: yes (manufacturer's specification)
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Recording Function: Photo & Video
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Playback Function: yes
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Internal Storage: 64 GB
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Battery Life: approx. 8 h per battery (manufacturer's specification)
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External Power Supply: USB 5 V
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Protection Class: IP67
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Operating Temperature: −20 °C to +50 °C
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Dimensions: approx. 190 × 69 × 59 mm
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Weight: approx. 475 g
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Tripod Thread: 1/4"
Scope of Delivery
- Thermtec WILD 635 thermal imaging device
- 2 × 18650 battery
- USB-C cable
- Charger
- Cleaning cloth
- Hand strap
- Neck strap
- Carry case
- German user manual
Note: Information regarding NETD (≤ 18 mK), detection/recognition distances, AI image calibration, AI functions, and app monitoring
are manufacturer's specifications and may vary depending on weather, humidity, background temperature, and target size. For everyday outdoor use:
IP67 housing protection is robust, but clean, dry storage is recommended after heavy wetness or mud contact.
FAQ
What does NETD ≤ 18 mK offer me in practice?
NETD describes (simplified) the ability to separate small temperature differences in the image. A low value can help to make fine contrasts
more visible in difficult conditions – according to the datasheet, the WILD 635 has ≤ 18 mK (manufacturer's specification).
How do I classify a field of view of 12.5° × 10.0° or 22 m at 100 m?
22 m at 100 m means: you have an overview of about 11 m to the left/right of the image center. This is helpful for quick finding – before you use
the zoom for details.
2.0× optical + 1–4× digital zoom: When do I use what?
Optical magnification is the "clean basis." Digital zoom makes the image larger, but does not increase the sensor resolution. In practice, it is
most sensibly used when the target is already securely in the image and you want to check specific details.
What do detection and recognition distance (deer) mean?
The distances (approx. 1800 m detection, approx. 600 m recognition) are manufacturer's specifications and refer to a defined target (deer) under defined
conditions. Weather, background, and humidity can significantly change the real values.
How useful is the removable 18650 battery system in everyday life?
Very practical: You can quickly swap batteries instead of relying on charging breaks. Thermtec states approx. 8 hours of runtime per battery (manufacturer's specification);
with two batteries included, this is well planned for longer missions.
