The durability and proven transmission stability of our patented reinforced polymer is the cornerstone of the CAP Series. Traditional round crystal infrared (IR) windows are made in 2" - 4" diameters. This is primarily because increasing the diameter and maintaining the thickness exponentially increases the fragility of the crystal, making larger sizes weaker and cost prohibitive.
Available in 4", 6", 12" and 24" widths, CAP series IR windows allow inspection of multiple components through one window, reducing the total number of windows required, associated installation time and costs.
The CAP-C offers locking covers for your IR window. These are useful in areas of high traffic and protect the IR viewing panes from impacts, flying debris and dust.
Protected by the IRISS unconditional lifetime warranty.
Window Housing and Cover
Standard product constructed of aluminum; custom materials available
UL 746 compliant, IR transmissive polymer; -40°C to 325°C
UL 94 5VA TPE; -40°C to 273°C
316 stainless steel
Useful Temperature Rating
-40°C to 200°C
Water and Dust Ingress
IP65 / NEMA 4: closed and when in use
Durable, fully impact-resistant
Fixed And Stable Transmission (FAST)
Proven compatibility with acids, alkalis, UV, moisture, humidity, vibration and high frequency noise
Reinforcing grills comply with IP2x standard for safe maximum hole size and fail-safe design
Optional cover with locking catches
Fitting templates and instructions included
Customizable; if you don’t see what you need in the standard offering you can configure:
Certified by UL (USA) & cUL (Canada) to the following standards:
746C: Impact and Flammability
1558: Impact and Load Resistance
508A; ANSI 508A
IEEE C37 20.2.a.3.6: Impact and Load
IP65 / NEMA 4
Lloyds of London Type Approval
American Bureau of Shipping (ABS)
BSI Quality ISO 9001 Certified System
CSA C22.2 No. 14-13
DNV (Det Norske Veritas) P261.1E Maritime, Vessel and Offshore Applications
A= 9.68 cm (3.81 in), B= 9.77 cm (3.85 in)
C= 15.24 cm (6 in), D= 15.24 cm (6 in)
A= 9.1 cm (3.6 in), B= 15 cm (5.9 in)
C= 16 cm (6.3 in), D= 21.8 cm (8.6 in)
A= 23.6 cm (9.3 in), B= 12.7 cm (5.0 in)
C= 30.5 cm (12.0 in), D= 20.6 cm (8.1 in)
A= 53 cm (20.9 in), B= 15 cm (5.9 in)
C= 61 cm (24.0 in), D= 21.8 cm (8.6 in)
Note: The dimensions listed above are not installation dimensions. Do NOT cut prior to receiving your IRISS window and installation template.