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The High Impact and Heat Resistant Clear Viewing Pane –


Clear Viewing Pane

To accommodate the needs of industrial applications, IRISS manufactures a clear viewing pane window in 4”, 6’’, 12’’ and 24’’ sizes and comes with or without a cover.

Load-Resistant Construction

The load-resistant, CAP-VIZ window is made from glass-fiber, reinforced Makrolon® polycarbonate that is an amorphous, thermoplastic molding compound.

Durable Design

The CAP-VIZ window is noted for its high light transmission, high temperature resistance, high impact strength, high creep modulus, superior dimensional stability and good electrical insulation properties.




Window Housing and Cover Standard product constructed of aluminum; custom materials available
Optic UL 746 compliant, IR transmissive polymer; -40°C (-40°F) to 325°C (617°F)
Gaskets UL 94 5VA TPE; -40°C (-40°F) to 273°C (523°F)
Hardware 316 stainless steel


Useful Temperature Rating -40°C (-40°F) to 200°C (392°F)
Water and Dust Ingress IP65 / NEMA 4: closed and when in use




cap diagram


Model Visual Window IR Window Overall Dimensions
CAP-V-6, CAP-VC-6, CAP-VCH-6 A= 9.7 cm (3.8 in), B= 5 cm (1.95 in) C= 9.1 cm (3.6 in), D= 5.8 cm (2.3 in) E= 16 cm (6.3 in), F= 21.8 cm (8.6 in)
CAP-V-12, CAP-VC-12, CAP-VCH-12 A= 23.9 cm (9.4 in), B= 5 cm (1.95 in) C= 23.6 cm (9.3 in), D= 5.8 cm (2.3 in) E= 30.5 cm (12.0 in), F= 20.6 cm (8.1 in)
CAP-V-24, CAP-VC-24, CAP-VCH-24 A= 54.1 cm (21.3 in), B= 5 cm (1.95 in) C= 53 cm (20.9 in), D= 5.8 cm (2.3 in) E= 61 cm (24.0 in), F= 21.8 cm (8.6 in)



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, DNV and ABS (American Bureau of Shipping) credentials.

Protected by our Unconditional Lifetime Warranty

Unconditional lifetime warranty 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.


ul certification

UL 508 & 508A

UL 508 and UL 508A are classification for the components used on electrical panels. UL 746C is a standard requiring flammability and impact tests for polymeric materials used on electrical equipment.

csa certification

CSA C22.2 No. 14-10

Canadian Standards Association shows that a product has been independently tested and certified to meet recognizable standards for safety and performance.

ul certification

UL 50V

UL 50V applies to infrared windows and is more of a classification than a standard that applies for performance-of-build characteristics.

lloyds of london certification

Lloyd’s of London

Lloyd’s provides independent, third-party approval certificates attesting to a product’s conformity with specific standards or specifications. It verifies the manufacturer’s production quality systems through a combination of design reviews and type testing.

ul certification

UL 50E

UL 50E standard applies to enclosures for electrical equipment intended to be installed and used in non-hazardous locations.

nema certification


These equivalent ratings certify enclosures for indoor or outdoor use. They protect against access to hazardous parts, ingress of foreign objects and water from rain, sleet, snow, splashing or hose directed water & ice formation damage.

ul certification

UL 746C

Sets the impact & flammability standards for polymer materials used in electrical equipment to 1500 volts. Plastic/polymer parts of an IR window must pass flammability tests at room temperature & remain intact during an impact test performed at 0°C (32°F).

abs certification

American Burea of Shipping

An ABS assessment is the pre-approval of a product for use on a variety of ABS- classed ships following a technical evaluation. Ship designers, builders and owners can select the product to be placed aboard and ABS-classed vessel.

ul certification

UL 1558

Requirement covers metal-enclosed, low-voltage power circuit breaker switchgear assemblies containing but not limited to low-voltage power circuit breakers, switches, control, instrumentation and metering, protective and regulating equipment.

csa certification

IEEE C37 20.2a.3.6

The IEEE C37 20.2 Section 3.6 is the impact and load requirement for all viewing panes installed on medium and high voltage switchgear. Panes made from crystal of glass will not pass these requirements.

dnv certification


DNV Certification is awarded for marine and offshore applications and allows preventative maintenance on electrical equipment in these vertical markets. DNV covers Rules for Classification of Ships and Offshore Standards (vessels, tankers, military and cruise ships, and oil –


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