Prevent dangerous arc flash The use of infrared (IR) inspection windows in industrial applications has grown exponentially over the past five years. Today, switchgear manufacturers regularly install IR windows at the point-of-manufacture. Much of the recent acceptance has coincided with the increase in the level of awareness regarding electrical safety and risk reduction. Organizations such as OSHA, NFPA, CSA, IEEE, ANSI and NETA have been at the vanguard of this movement.Industrial-grade VPFR series infrared windows from IRISS will enable thermographers to survey critical electrical applications more efficiently and more safely than ever before.
Viewing ports provide safer inspections NFPA standards recommend infrared inspection under fully energized conditions; but PPE requirements and panel cover removal and re-installation are time-consuming and therefore costly. Use of the VPFR nearly eliminates the risks associated with infrared electrical inspection by providing companies with a noninvasive, closed-panel inspection methodology. Thermographers inspecting through the window are never exposed to energized conductors and circuit parts, and not engaged in risk-increasing behaviors (as outlined in the 130.7(C)(9) of NFPA 70E). Therefore, the elevated levels of PPE prescribed by 70E for invasive surveys are not required when utilizing the VPFR, thereby minimizing survey time while maximizing safety.


Window housing and cover UL 94 5VA Nylon (“switchgear-grade plastic”); -40°C (-40°F) to 273°C (523°F)
Optic UL 746C certified, IR transmissive polymer; -40°C (-40°F) to 325°C (617°F)
Reinforcing grill Aluminum coated with UL 94 5VA Nylon; -40°C (-40°F) to 273°C (523°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


Body Diameter Viewing Pane Diameter Assembly Thickness
VPFR-50 8.3 cm (3.3 in) 5 cm (2 in) 1.8 cm (0.7 in)
VPFR-75 11.2 cm (4.4 in) ) 7.5 cm (3 in 1.8 cm (0.7 in)
VPFR-100 14.5 cm (5.7 in) 10 cm (4 in) 2.0 cm (0.8 in)