THERMISIGHT DYNAMICS LLC
See What Others Can't.™
USAATN OTS-HD 640 2.5-25x Thermal Monocular
NDAA §889 compliant · U.S. end-use only
In stock · ships within 5 business days
Smart thermal monocular with a 640 sensor, Wi-Fi streaming, recoil-activated video, and on-board ballistics for field use.
Watch on YouTube
No demo video for this exact model yet — browse our channel for field tests and walkthroughs.
U.S. export-controlled. Thermal and night-vision devices are subject to U.S. ITAR/EAR controls and are not exportable outside the United States. By checking the box you confirm you are a U.S. person purchasing for end-use within the United States. See our Export Compliance policy.
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Why This Product
The ATN OTS-HD 640 2.5-25x Thermal Monocular is a handheld thermal monocular designed for fast target spotting and scouting on the move. Its 640×640 sensor and 30 mK NETD sensitivity delivers exceptional contrast in rain, fog, and high humidity. It identifies heat signatures out to 2000 yards — enough reach for most hunting scenarios. Backed by 24-month warranty and Thermisight's veteran-owned service team.
Expert Video Reviews
Watch expert reviews on YouTube
See the ATN OTS-HD 640 2.5-25x Thermal Monocular in action — hands-on reviews, field tests & comparisons
Warranty
2-year limited manufacturer warranty
- Covers defects in materials & workmanship
- 30-day satisfaction return window
Financing Calculator
- Purchase price
- $1,399
- APR
- 0%
- Down payment
- $0
- Total of payments
- $1,399
Estimates only. Subject to credit approval at checkout. Select "Pay over time" during checkout to apply.
Complete your kit
Compatible accessories for your ATN ATN OTS-HD 640 2.5-25x Thermal Monocular.
Specifications
- Sensor
- 640x480 (12um)
- Objective
- 25mm
- Magnification
- 2.5-25x
- Refresh
- 30Hz
- Detection
- 2,000 yd
- LRF
- No
- Wi-Fi streaming
- Weight
- 440g
Sample Thermal Images
Real thermal imaging samples captured with this camera — swipe to browse, tap any image to view full size.
Compare detection range & sensitivity
Side-by-side with similar thermal monocular optics. Lower NETD = better thermal sensitivity; higher detection range = farther identification.
| Spec | | | | | |
|---|---|---|---|---|---|
| Detection range | 2,000 yd | 2,200 yd | 2,200 yd | 2,200 yd | 2,000 yd |
| Sensitivity (NETD) | 30 mK | 60 mK | 60 mK | 60 mK | 18 mK |
| Sensor res. | 640×640 | 256×256 | 640×640 | 640×640 | 640×640 |
| Objective | 25mm | 75mm | 75mm | 75mm | 25mm |
| LRF | No | Yes | Yes | No | Yes |
| Price | $1,399 | $12,999 | $12,999 | $3,499 | $12,999 |
Best-in-row values are shown in accent. Your current optic is highlighted.
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Care & Maintenance
Lens Care
- •Clean the objective lens with a microfiber cloth and optical-grade solution only.
- •Blow off dust before wiping to prevent scratching the germanium lens.
- •Keep the lens cap on when stored in a pack or pocket.
Battery & Power
- •Remove batteries for storage longer than 30 days.
- •Carry a spare battery in cold weather — lithium cells drain faster below 32°F.
- •Use only manufacturer-approved batteries to avoid warranty void.
Storage & Environment
- •Store in its case in a dry, temperature-controlled environment.
- •Avoid prolonged exposure to direct sunlight when not in use — the sensor can retain heat and affect calibration.
- •Allow the optic to acclimate to ambient temperature before use after moving between extreme environments.
Questions & Answers
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ATN OTS-HD 640 2.5-25x Thermal Monocular
$1,399