One of the Most Versatile Thermal Optics Available

The iRay RH25 Thermal Monocular has earned a reputation as one of the most versatile thermal optics on the market. Instead of purchasing multiple thermal devices for different applications, the RH25 V2 combines four different roles into a single compact unit. Whether you're hunting hogs, tracking predators, conducting nighttime surveillance, or building a professional thermal setup, the RH25 delivers premium performance without compromise.

With a 640×480 thermal sensor, an ultra-sensitive ≤18mK NETD, and an upgraded 1440×1080 AMOLED display, the RH25 V2 offers exceptional image quality in virtually every lighting condition. After examining its features and capabilities, it's easy to understand why so many hunters and professionals consider it one of the best thermal optics available today.

Our team at Defense Distributors is going to break it down.

Design and Build Quality

The first thing you'll notice about the RH25 V2 is its compact size.

Unlike traditional thermal scopes or optics that are permanently mounted to a rifle, the RH25 is designed to move between multiple platforms with ease, making it an easy choice of an optic. The lightweight machined magnesium alloy housing keeps overall weight low while providing outstanding durability for demanding field conditions.

Its Flat Dark Earth finish complements modern rifles while resisting wear from heavy use.

The controls are intuitive and easy to access, even while wearing gloves, making operation simple during nighttime hunts or cold weather.

Four Devices in One

The biggest selling point of the RH25 is its incredible versatility.

Instead of serving a single purpose, the RH25 functions as:

• Handheld thermal monocular
• Helmet-mounted thermal scanner
• Standalone thermal weapon sight
• Clip-on thermal optic for day scopes

This flexibility allows users to detect targets while scanning, then transition the optic directly onto a rifle without carrying multiple expensive thermal devices.

For hunters and tactical users alike, this can save thousands of dollars while simplifying your overall gear setup.

Outstanding Thermal Image Quality

Image quality is where the RH25 truly separates itself from many competitors.

The optic features:

• 640×480 thermal sensor
• 12-micron pixel pitch
• MATRIX III image processing
• ≤18mK NETD
• 60Hz refresh rate

The low 18mK NETD is especially impressive.

NETD measures thermal sensitivity, and lower numbers produce cleaner images by detecting smaller temperature differences. This allows the RH25 to reveal subtle details that many lower-end thermal optics simply miss.

Whether you're scanning open fields, wooded terrain, foggy mornings, or humid nights, the RH25 consistently delivers sharp, high-contrast thermal images.

The 60Hz refresh rate also creates smooth movement while tracking moving animals without the lag found in slower thermal optics.

Upgraded AMOLED Display

One of the biggest improvements over the original RH25 is the display.

The V2 now includes a 1440×1080 AMOLED screen that provides:

• Sharper images
• Better color rendering
• Increased brightness
• Larger viewing area
• Improved clip-on performance

When used as a clip-on in front of a daytime optic, the larger display makes target acquisition easier while maintaining image clarity behind optics up to 6x magnification.

Excellent for Hunting

For predator and hog hunters, the RH25 checks nearly every box.

Because thermal detects heat rather than available light, it performs exceptionally well in:

• Complete darkness
• Dense brush
• Smoke
• Light fog
• Thick vegetation

Finding animals becomes dramatically easier than relying solely on traditional night vision.

Many experienced hunters use the RH25 as a handheld scanner before transitioning it onto their rifle once a target has been located.

Recording Features

The RH25 isn't just designed for shooting—it also allows users to document their hunts.

Features include:

• 64GB internal storage
• Photo capture
• Video recording
• Audio recording
• USB-C file transfers

Content creators and hunting enthusiasts will appreciate how simple it is to record and share footage without needing external recording devices.

Battery Performance

Battery life is solid for a high-performance thermal optic.

The included rechargeable 18650 battery delivers approximately four hours of runtime, while USB-C compatibility allows external battery packs to extend operating time for long nights in the field.

This flexibility makes the RH25 well-suited for extended hunts or professional applications.

iRay RH25 Pros and Cons

Pros

• Four devices in one compact optic
• Outstanding thermal image quality
• Extremely sensitive ≤18mK NETD
• Smooth 60Hz refresh rate
• Lightweight magnesium housing
• Crisp AMOLED display
• Clip-on compatible up to 6x optics
• Internal photo and video recording
• USB-C external power support
• Excellent build quality

Cons

• Premium price point
• Four-hour internal battery life may require spare batteries for extended hunts
• Learning curve for users new to multifunction thermal systems

Who Should Buy the iRay RH25?

The RH25 is an outstanding choice for:

• Hog hunters
• Predator hunters
• Ranchers
• Professional night hunters
• Law enforcement professionals
• Thermal enthusiasts
• Anyone wanting one optic that performs multiple roles

If you're looking to invest in a premium thermal optic that can replace several separate devices from close range to long range engagements, the RH25 delivers exceptional value despite its premium price.

Final Verdict

The iRay RH25 Thermal Monocular is one of the most versatile thermal optics available today, a great upgrade for your rifle. Rather than limiting users to a single application, it seamlessly transitions between a handheld scanner, helmet-mounted thermal, standalone weapon sight, and clip-on optic.

Combined with its outstanding 640×480 sensor, industry-leading ≤18mK thermal sensitivity, smooth 60Hz refresh rate, and upgraded AMOLED display, the RH25 provides premium performance in nearly every environment.

While it represents a significant investment, its ability to replace multiple dedicated thermal devices makes it a smart long-term purchase for serious hunters, professionals, and anyone seeking top-tier thermal capability.

Rating: 5/5 Stars

If you're looking for a high-end thermal optic that offers exceptional image quality, unmatched versatility, and rugged reliability, the iRay RH25 V2 is one of the best options currently available.

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