iRay MH25 Helmet Mountable Thermal Monocular - Arkayne

iRay MH25 Helmet Mountable Thermal Monocular

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Lead Time on this product: Text Ethan at 717-319-1645 for accurate lead time


The MH25 is the next big improvement in Thermal Monocular technology brought to you by iRay USA. Thermal monoculars offer a huge advantage over simply running night vision alone. As thermal technology increases, the clarity and performance continues to rapidly expand. While we don’t see much improvement year over year in analog night vision technology, thermal expands rapidly every year. Here is a basic run down of what is included with this unit (for more specs, read below):

  • Includes ONE iRay MH25 thermal monocular
  • Includes two rechargeable batteries (see FAQ section about PROPER battery use!)
  • Carry case included
  • USB Mini Cord for charging batteries
  • USB C cord with 90 degree elbow for running external power pack
  • USB C/USB/Analog cord for video out
  • User Manual
  • Strap for carry case
What mount should you run with your thermal monocular?

This unit purchased here does not include any mounting methods. If you would like to mount your iRay MH25 to your helmet, we can offer the panobridge found HERE or the Mod Armory Bridge HERE. Please read full description of the PanoBridge & Mod Armory Bridge prior to ordering.

The MH25 has extreme clarity, fast response and awesome function. This unit is light enough to wear on a helmet and small enough to carry in your pocket. If you are looking for a 640 core thermal with a tiny footprint, this is probably what you need.

*NOTE: You are purchasing ONE MH25. The pictures of the bridged MH25’s and bridged PVS14 are for reference only. Purchase the panobridge, Mod Armory Bridge, and/or PVS 14 separately*

Available on backorder


What is the MH25 Mini Thermal?

The MH25 is a micro 640×480 core handheld or helmet mountable thermal monocular designed to be a high performance unit in an extremely small package. Small is right. This unit is tiny. What makes this optic special is the clarity and performance of the core, coupled with its size and true 1.1X base magnification (can be adjusted from 1X to 8X digitally). This unit is purpose built to assist you in navigation and scanning in total darkness.

Features of the MH25:

The MH25 is a tiny thermal packed with features. The 640×480 core ensures crystal clear identification of heat signatures. The light weight package means it is comfortable to use for extended periods of time, whether helmet mounted or handheld. One single power button/function knob keeps changing settings and navigating menus simple. Even in total darkness the settings can be changed quickly and easily from the one button/knob. Screen resolution of this unit is 1280×960 and there are four color palettes to choose from while scanning. Our team generally prefers the white hot setting, but internally users can switch between white hot, black hot, red hot, and rainbow. Battery life for this particular model is rather short but swapping batteries is very easy and fast. Included batteries are rechargeable with the included USB C cord. The MH25 is an extremely high performance thermal.

What Mount should I use for the MH25?

We have several helmet mount options available for the MH25 on our website. The Panobridge or Mod Armory Bridge are two methods of attachment to either the Lo Sto, G24, or Photonis breakaway mounts.



Sensor Resolution


Optical Magnification

1.1X Base

Digital Magnification


Sensor Pixel Size

12 Micron

Sensor Frame Rate

50 HZ

Objective Focal Length


Objective Diameter


Objective F #


Detection Range

1375 yards

Imaging Modes

White, Black, Red, Rainbow

Mounting System

MUM Rail



Eye Relief


Operation Time

1.5 hours per battery (2 included)


8.64 Ounces

Weather Resistance

IP65 Rated


1.) What is the battery life of the MH25 

The greatest “pitfall” of the MH25, in our opinion, is the battery run time. We have been experiencing about 1.5 hours of CONSTANT use. If you are turning your unit on and off, it may be longer. With that being said, when we hunt, our units stay on. Our solution to this is to simply carry spare batteries.

2.) Can the MH25 be used with an external battery pack? 

Yes. The MH25 can operate from an external power pack so long as it is 5V or LESS. DO NOT EXCEED 5V! Many external cell phone chargers will work but you must make sure you use a battery pack that is 5V or less.

3.) What are proper batteries for the MH25? 

Included with this unit are TWO rechargeable ML1665R from nitecore. There is a built in USB Mini charge port with these batteries. This unit will not work with standard non-rechargeable CR123 batteries. Most CR123 batteries are 3V and are not adequate for use in the MH25. The included rechargeable batteries are 3.6V each. We only recommend using the included batteries or running a USB power pack that is no more than 5V.

4.) What is included with the MH25? 

The MH25 includes the following items:  one fabric carry case, two rechargeable batteries, USB C cord w/ 90 degree plug for battery pack use, USB Mini for battery charging, USB/USB C/Analog cord for video out to DVR instruction manual.

5.) How much better is 640 vs 320 or 384 core?  

We typically only recommend 640×480 cores. The image clarity and quality is substantially better than a 320 or 384 core. With that being said, if your budget doesn’t allow the price tag of a 640 core, lower resolution may be the only option. You can get a lot of work done with lower resolution, but when it comes to helmet mounting, 640×480 is the way.

6.) What about a warranty?

Contact iRay after purchase to register for their warranty.

7.) Is a helmet mount included in the price above? 

No. You will need to purchase a helmet mount separately. Please see our web page discussing the panobridge to learn more about how to mount an MH25 to your helmet.

8.) Can the MH25 be run on the Panobridge or Mod Armory Bridge along with a PVS14? 

Yes. You will need to purchase the panobridge or mod armory bridge separately. The PVS14 is also sold separately. We also recommend getting the PVS14 eye piece for the MH25 if you decide to run it bridged with a PVS14. NOTE: PVS14 eye pieces are MODIFIED to work with the MH25. You Can not simply purchase a PVS 14 eye piece and install to the MH25. Purchase one of our modified PVS14 eye pieces HERE.


See bullet point #4 above for all included accessories.

NOTE: Lead times for units shown above is 5 – 10 days. This can change without notice. Please contact us with lead time inquiries.

Customer Reviews
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  1. Ryan Smith (verified owner)

    This optic was an excellent addition to my set up and I appreciated the team installing some components prior to shipment, saved me from dealing with any possible issues. Highly recommend