Polymer Vs Crystal IR Windows: What’s the Difference?

IR Windows are specially designed optic windows which allow users to view higher voltage equipment. They make it easier for standard and infrared viewing and do their job without disrupting the environment they are in.Typically, they do this attached to switchgear enclosures. They’re constructed from metal or plastic frames, with clamped-in infrared transmissive optics. This gives users a portal into the chamber while keeping everybody (and everything) safe.Now, if you’re considering an IR window in your facility, the chances are you’ve come across two names, out in the wild. Crystal IR and Polymer IR. In today’s article, we’ll be explaining the differences between these two very popular materials, and the benefits of each.

Crystal IR Windows

IR windows were all constructed from crystal lenses, traditionally. This tradition has been brought through to the crystal infrared window industry of today. We find Germanium, Zinc Selenide, Calcium Fluoride, and Sapphire comprising modern-day crystal installations.

But what are the limitations of crystal, and its advantages?

Crystal Limitations

The plates used in these installations are usually limited to 4? diameters
In addition to their size, these plates are also only available in round shapes
They’re considered quite fragile, and certainly not impact resistant
Often more expensive than a polymer configuration

Crystal Advantages

It’s a material that’s built for high ambient temperatures
It can withstand extreme environments
Crystals allow for relatively straightforward visual inspections
These installations are compatible with every IR imager out there

It must be stated again that crystal IR windows are hygroscopic and quite fragile. They have a high degree of efficacy in their use but can be a hassle to use. Visually and thermally, they let us observe higher voltage equipment without disrupting it.

Polymer Windows

Polymer can be considered the “new kid on the block” in the infrared window community. Having only really gained its popularity in the last few years, this material may come in several varieties, depending on what you buy, and why.

Whether you get yours in opaque or clear, with reinforcement or without, there are a few things you should know, ahead of time.

Polymer Limitations

These aren’t suitable in any high-temperature environment above 200?C
It’s recommended you bring in an expert for consultation before you order a window in a custom size or shape

Polymer Advantages

These are ideal for use in industrial environments
They have a consistent transmissivity that is also very stable
Polymer is compatible with all IR imagers
They are impact-resistant
There are a variety of size and shape options available
They’re less expensive than traditional crystal

Polymer Vs Crystal IR Windows

There’s no mystery to it: Infrared windows are windows into cabinets that allow us to examine electrical components. What they share in common is their construction: metal or plastic frames, with a precisely-cut transmissive optic. Where they differ, however, is in the optics, themselves.

Hopefully, today’s article has enlightened you somewhat as to what each one does, and what it has to offer you.

Interested in learning more about Polymer Vs Crystal IR Windows or other thermal standard? Get in touch with us, today, and find out more about our expert inspection services.