THERMTEC CYCLONE 625 THERMAL

ThermTec Cyclone 625 is a compact and lightweight thermal monocular for short- and medium-range observation. Its 640 × 512 resolution, 12 µm pixel pitch, and NETD <20 mK thermal module works together with a 25 mm F1.0 lens, providing a wide field of view and clear thermal images in darkness and challenging weather conditions.

Suitable for use in

• Searching for and observing animals during hunting

• Forests, thickets, and varied terrain

• Short- and medium-range thermal observation

• Nighttime monitoring of wild animals and birds

• Hiking and nature observation

• Quick detection of heat sources

• Search and observation tasks

• Users who prefer a wide field of view

• Both right- and left-handed users

• Recording images, videos, and audio

Why choose ThermTec Cyclone 625?

• High 640 × 512 thermal module resolution

• 12 µm pixel pitch

• Thermal sensitivity NETD <20 mK

• Bright 25 mm F1.0 lens

• Wide 30.8 × 24.6 m field of view at 100 m distance

• Low 1.4× base magnification for fast terrain scanning

• Manufacturer-specified detection range up to 1300 m

• Smooth 50 Hz thermal image

• Three image modes and six color palettes

• ThermTec AI-based image calibration

• AI-based multi-target distance estimation

• Hot spot tracking function

• Picture-in-picture view

• 32 GB internal memory

• Photo, video, and audio recording

• Wi-Fi connectivity and ThermTec Outdoor mobile app

• Replaceable and rechargeable 18650 battery

• Model-based runtime up to 8 hours per battery

• Fast, approximately 3-second startup

• IP67 protection rating

• Weighs only 261 g without battery

• Ergonomic body designed for one-handed use

Technical specifications

Thermal module and optics

• Product type: handheld thermal monocular

• Thermal module resolution: 640 × 512

• Pixel pitch: 12 µm

• Thermal sensitivity: NETD <20 mK

• Spectral range: 8–14 µm

• Frame rate: 50 Hz

• Lens: 25 mm F1.0

• Base (optical) magnification: 1.4×

• Digital zoom: 1×, 2×, and 4×

• Field of view: 17.5° × 14°

• Field of view at 100 m: 30.8 × 24.6 m

• Manufacturer-specified detection range: up to 1300 m

• Minimum focusing distance: 0.5 m

• Focusing: manual

• Calibration: automatic or manual

Display and image presentation

• Display type: AMOLED

• Display resolution: 1024 × 768

• Display size: 0.39"

• Eye relief: 20 mm

• Exit pupil: 6 mm

• Diopter adjustment: ±5 D

• Image modes: Forest, Target, and Outline

• Color palettes: White Hot, Black Hot, Red Hot, Green, Golden, and Violet

• Picture-in-picture function: yes

• Hot spot tracking: yes

• AI-based image calibration: yes

• Burn-in prevention function: yes

Recording and smart functions

• Internal memory: 32 GB

• Photo recording: yes

• Video recording: yes

• Audio recording: yes, can be disabled from the menu

• Photo and video playback on device: yes

• On-screen elements recording: yes

• AI distance estimation: yes

• Simultaneous multi-target distance estimation: yes

• Wi-Fi hotspot: yes

• Mobile app: ThermTec Outdoor

• Remote control via app: yes

• Connection: USB Type-C

• Data transfer via USB cable: yes

• Operation during charging: yes

• Menus: multilingual user interface

Power and construction

• Battery: replaceable and rechargeable 18650 lithium-ion battery

• Battery nominal voltage: 3.6 V

• Battery capacity: 3300 mAh

• Model-based maximum runtime: up to 8 hours per battery

• Startup time: approximately 3 seconds

• Protection rating: IP67

• Operating temperature: –20 to +50 °C

• Dimensions: 136 × 76 × 54 mm

• Weight: 261 g without battery

• Control: one-handed buttons

• User hand: suitable for right- and left-handed users

The manufacturer-stated 1300 m figure refers to the detection range of a suitable-sized heat source, not the identification range of a specific animal or object. Actual observation capability depends on target size, temperature difference, humidity, precipitation, and other environmental conditions.

Included in the package

• ThermTec Cyclone 625 thermal monocular

• 2 × rechargeable 18650 lithium-ion batteries

• Battery charger

• USB cable

• Lens cleaning cloth

• User manual

• Maintenance and support card

The exact contents of the package may vary depending on the delivery batch or market region.

Frequently Asked Questions

Is the ThermTec Cyclone 625 a thermal sight?

No. The Cyclone 625 is a handheld thermal monocular designed for observing surroundings and detecting heat sources. It is not intended for weapon mounting or use as a sight.

Does the device have a laser rangefinder?

No. The Cyclone 625 uses software-based AI distance estimation, not an integrated laser rangefinder. The measurement should be treated as an approximate aid, with accuracy affected by target type, size, and visibility.

What does a 1300 m detection range mean?

This is the maximum distance specified by the manufacturer at which a suitably sized heat source can be detected under good conditions. It does not mean that the type or other details of the object can be reliably identified at the same distance.

How long does the Cyclone 625 operate on a single battery?

The technical table indicates up to 8 hours of operation with a single 3300 mAh 18650 battery. Actual runtime will be shorter in cold conditions and when using Wi-Fi, recording, AI distance estimation, and other power-intensive features. Bringing two charged batteries allows for extended observation outdoors.

Does the Cyclone 625 record audio?

Yes. The device allows photos, video, and audio to be recorded on the 32 GB internal memory. Audio recording can be disabled in the menu.

Can a thermal camera see through glass?

Generally, no. Ordinary glass does not transmit long-wave thermal radiation to the thermal camera, and the screen mainly displays the temperature of the glass surface and reflections. For best results, observe through an open window or outdoors.

Can the device be used in the rain?

The IP67 protection rating makes the device dust- and waterproof under manufacturer-specified conditions. The connector cover must be properly closed, and the wet device should be dried after use. IP67 does not mean the device is intended for prolonged underwater use.

How to connect the Cyclone 625 to a phone?

Enable the Wi-Fi hotspot on the device and connect your phone to this network. Then use the ThermTec Outdoor app to view images, control the device, and manage recordings. The app is available for supported Android and iOS devices.

When is the ThermTec Cyclone 625 the right choice?

The Cyclone 625 is suitable for users who want a high-resolution thermal monocular with a wide field of view and low base magnification for moving through forests, thickets, and varied terrain. The 25 mm lens and 30.8 m wide field of view at 100 meters help quickly scan larger areas, while the 640 × 512 thermal module preserves more detail during digital zoom than lower-resolution models.

The Cyclone 325 may be a more affordable choice if 384 × 288 resolution meets your needs. For longer distances and open fields, consider a model with a 35 or 50 mm lens, which provides higher base magnification for distant targets but reduces the field of view. If precise distance measurement is important, choose a thermal device with an integrated laser rangefinder.

Expert recommendation

First, adjust the eyepiece diopter so that the screen symbols are sharp, and only then focus the lens on the area to be observed. In the forest, low base magnification and a wide field of view provide a good overview, but for more precise assessment of animals, use digital zoom moderately. Excessive digital zoom enlarges the image but does not add new detail beyond what the thermal module originally captured.

Do not point the thermal camera lens at the sun, laser, or any other very intense energy source. Allow the device brought from cold to a warm room to acclimate for 2–3 hours before switching it on. For long-term storage, remove the battery, keep the connector closed, and remove loose dust from the lens with air or a soft brush suitable for optics before wiping with a cloth.

Compact 640 × 512 thermal monocular with wide field of view

The ThermTec Cyclone 625 combines a 640 × 512 thermal module, 25 mm F1.0 lens, NETD <20 mK thermal sensitivity, and a wide field of view in a body weighing just 261 grams. Fast startup, replaceable 18650 battery, 32 GB memory, and AI-based observation features make it a practical thermal device for forests, hunting, and nature observation.