Poly-View™ Optics System

The VPT Series utilizes our exclusive Poly-View™ technology enabling visual inspections as well as traditional IR inspections across the entire Infrared spectrum. Ultraviolet (UV) inspection can also be performed via the Poly-View™ system.

Fixed and Stable Transmission

Polymer based infrared windows are unaffected by the environmental and mechanical stresses that degrade the transmission of crystal based IR windows which are fragile and hygroscopic (even when coated). The polymer IR window systems will maintain fixed and stable transmission (FAST) for the life of the installation ensuring that the temperature data collected through the IR window is accurate and reliable for the whole life of the installation.

Arc Containment Tested

The VPT Series was successfully tested to the IEC 62271-200 standard for arc containment on metal enclosed switchgear assemblies. In addition, the VPT Series have been used extensively by OEMs in UL Arc Resistant switchgear designs and have successfully passed every Arc Resistant type test to which they have been subjected.


Any Camera - Any Task

The exclusive industrial-grade, reinforced polymer optic allows any thermographic camera to monitor completely undisturbed assets inside electrical equipment. The IRISS Polymer optics work with all ranges of Infrared, Ultraviolet and Visual Inspection Cameras.

Anti-Fogging Optic

Polymer optics do not experience a temperature differential across the optic that often causes fogging to occur in similar crystal optics under certain environmental conditions that are common in outdoor and marine applications.

Tested and Certified to The Highest Industry Standards

IRISS IR windows are the most certified windows in the industry with IEEE (impact & load), UL, cUL, Lloyds, CSA 22.2 14-13 for industrial control equipment. Our marine certifications are Lloyds, DNV and ABS (American Bureau of Shipping) credentials. IRISS IR windows are also arc tested to IEC 62271-200 Arc Flash Spec test 1.1 Second Duration, IEC 60262271-200: 63kA, IEC 60298 Appendix: 63kA, IEEE C37.20.7 Type 2B: 63kA.

Environmentally Sealed Design

The VPT Series of products are constructed from switchgear grade Nylon plastic with an aluminum cover and stainless steel mounting screws. Seamless custom gaskets ensure the NEMA4 / IP65 ingress protection rating is maintained.

Durable and Rugged

Polymer based IR windows are far more able to resist the mechanical stresses applied to IR window that are fitted to electrical distribution equipment. It was IRISS that first came to market with industrial grade IR windows that could meet the mandatory impact and load testing requirements of UL, CSA, IEEE, IEC, CE testing that could never be passed by any crystal based IR window.

Proudly Made in the United States

IRISS manufactures and assembles all products at our global headquarters located in Bradenton, FL.

Protected by our Unconditional Lifetime Warranty

The IRISS Unconditional lifetime warranty is unique in the IR industry as it not only applies not only to the workmanship of the window housing but also applies to the durability and stability of the optic in the proposed environment. No other manufacturer can offer this because crystal optics will fail over time, and are only able to at best offer a limited lifetime warranty for manufacturing defects.


General Specifications
NEMA Enviroment TypeIP65 / NEMA 4
Voltage RangeAny
Operating Temperature-40°C (-40°F) to 325°C (617°F)
Body and Cover MaterialPowder Coated 5052 Aluminum
Hardware316 Stainless Steel
GasketsUL 94 5VA TPE; -40°C (-40°F) to 273°C (523°F)
Dimension and Optic Specifications
Optic MaterialUL 746 compliant, visual, UV and IR transmissive polymer; -40°C (-40°F) to 325°C (617°F)
Optic Reinforcing Grill MaterialAluminum Reinforcing Grill (IP22/ IP2x Standard)
Viewing Aperture Dimensions5.1 cm (2.0 in) Ø7.6 cm (3.0 in) Ø10.2 cm (4.0 in) Ø
Overall Dimensions 9.1 cm (3.6 in) Ø 12.1 cm (4.8 in) Ø 15.1 cm (5.95 in) Ø
Overall Thickness 2.6 cm (1.0 in) 2.6 cm (1.0 in) 2.6 cm (1.0 in)
Inspection Capabilities and Applications
Midwave IRYes
Longwave IRYes
Ultraviolet (UV)Yes
Visual InspectionYes
Medium/High Voltage ApplicationsYes
Outdoor ApplicationsYes
Ratings and Testing
UL 50V & UL 50EStandard for Infrared Viewports & the environmental ratings , which apply to enclosures.
UL 746C & UL 746A-2012Impact and flame resistance standards for polymeric components.
UL 1558Impact and load resistance for low voltage, metal enclosed assemblies.
UL 508A/ ANSI 508AIndustrial Control Panel Standards.
CSA C22.2 No. 14-13CSA Standard for Industrial Control Equipment
CSA C22.2 No. 14-10CSA Standard for Low Voltage Distribution and Control Equipment
CSA C22.2 No. 94-M91This Standard applies to special purpose enclosures for electrical equipment intended to be installed
CSA C22.2 No. 94.1-07This Standard applies to special purpose enclosures for electrical equipment intended to be installed and used in non-hazardous locations.
CSA C22.2 No. 94.2-07Standard applies to Enclosures for Electrical Equipment, Environmental Considerations.
IEEE C37.20.7 Type 2BDefines switchgear arc resistance from the front, sides and rear. Type B specifies arc resistance is maintained, even when opening designated, low voltage equipment.
IEEE C37 20.2.a.3.6IR windows mounted in medium and high voltage, metal clad and station-type gear are required to withstand impact and load from all sides without cracking, shattering or dislodging.
IEC 62271-200Specification equirements for pre-fabricated metal enclosed switchgear and control gear above 1 kV and through 52 kV. Enclosures may include fixed and removeable components and have various insulating properties.
IEC 62271-200Arc containment tested; Arc Flash Spectest: 1.1 sec duration at 63kA.
IEC 60068-2-6:2007Environmental testing- Vibration.
IEC 60068-2-3Environmental testing- Damp heat, steady state.
IEC 60068-2-78:2012Environmental testing- Extreme humidity withstand.
American Bureau of Shipping (ABS)A classification society, with a mission to promote the security of life, property and the environment through desin verifications standards for marine related operations.
DNV P261.1E Maritime, Vessel & OffshoreA global quality assurance and risk management company that provides classifications and design validations to products used in the maritime, vessel and offshore industries.
Lloyds of London Type ApprovalLR provides independent approval certificates, validating a product’s confirmity within specific standards and specifications. It also validates quality production by design reviews, site audits and type testing.
WarrantyUnconditional Lifetime Warranty

Recommended products



VPFC Series

CAP-ENV Series

Follow IRISS