Pocket K3

NETD stands for Noise Equivalent Temperature Difference, and it’s one of the most important specs in thermal optics.

What it actually means

NETD measures how small a temperature difference a thermal sensor can detect.

• It’s usually expressed in millikelvin (mK)
  
• Example: <30 mK means the device can detect temperature differences as small as 0.03°C

Pixel pitch is the distance between pixels on a thermal sensor. Smaller pixel pitch (e.g. 12μm) means more pixels and sharper image detail.

Why it matters:

Smaller pitch = better clarity, improved detection, and more compact devices.

Pixel resolution determines how much detail a thermal device can display. Higher resolutions—such as 640×512—use more pixels to detect heat, producing sharper images, clearer target identification, and better digital zoom. Lower resolution devices can still detect heat but often lack the detail needed to clearly distinguish objects.

Frame rate, measured in Hz, is how many times per second the image refreshes. Higher frame rates—like 50–60 Hz—provide smoother motion, less lag, and better tracking of moving targets, while lower frame rates can appear more choppy when scanning or following movement.

Duration

All RIX Optics complete devices come with a standard 3-year warranty.

For thermal imaging devices featuring 384x288 resolution detectors or higher resolution detectors, an additional 2-year extended warranty is available upon registration on the RIX official website.

Coverage

All products purchased from RIX Optics are guaranteed to be free from manufacturing defects or breakage associated with the intended normal use of the product during the periods as stated above from the date of purchase.

Exclusions

• Does not apply to modified, abused, neglected, or misused products outside the scope of their intended use.
• Does not warrant or accept damages associated with normal wear, intentional damage, sensor core burns or damage, operator error, host weapons, ammunition, theft, loss, or any other cause or event not specifically stated herein.
• Does not cover products that have been repaired by the customer or any other party without obtaining prior written consent from RIX Optics. If the products are modified or maintained by anyone other than RIX Optics, this warranty becomes invalid and no longer applies.
• Does not apply to failure or damage caused by failure to follow the product's instructions for use or storage, or maintenance, including damages caused by improper handling, neglect, or environmental factors. For full details, please refer to the Universal Terms of Use page.
• Does not apply to damage caused by impact, fire, lightning strikes, flooding, human negligence, natural disasters, or force majeure events.

Repair

We strive to ensure that your experience with us is effortless and trouble-free. If you have any warranty work that needs to be conducted, please submit the Warranty Registration Form.

Repair or Replacement Policy

• Please note that not all parts are currently available, and there are certain issues that cannot be repaired. If your product is diagnosed as unrepairable or falls outside the scope of our warranty, our service team will get in touch with you to discuss the available options.
• If your unit can't be repaired within 14 business days after we receive it, it will be replaced with either the exact same unit or a direct replacement if your unit is discontinued.
• One-way shipping covered for the first 60 days after the original purchase date: you cover the cost of sending the unit to us for repair, and RIX will cover the cost of returning it to you once the repair is complete. After 60 days, this warranty does not cover the expenses associated with shipping or transporting the product (including to and from RIX Optics or our authorized dealer), insurance, or any fees, duties, and taxes for warranty claims made outside the European Union. These costs solely fall under the buyer's responsibility and are not included in the coverage provided by this warranty.

To active your 5 year warranty on your optics follow the link below:

http://eu.rixoptics.com/warranty/