Fluke 147.1 x 23 x 189.3mm Inspection Window for use with NEMA 12 Enclosure, NEMA 4 Enclosure

The Fluke CV400 is a medium-format infrared inspection window designed for safe, closed-panel thermography inside NEMA 12 and NEMA 4 electrical enclosures. Its 147.1 × 23 × 189.3 mm footprint accommodates a clear, impact-resistant viewing port that allows technicians to perform thermal, visual and ultraviolet inspections without opening energised switchgear. The stainless-steel frame, reinforced optics and mechanically secure cover assembly maintain enclosure integrity while supporting routine predictive-maintenance workflows.

Core Capabilities of the Fluke Inspection Window for NEMA 12 and 4 Enclosure

• Medium-size 147.1 × 23 × 189.3 mm format suitable for broad viewing areas on control panels.
• Compatible with NEMA 12 and NEMA 4 enclosures, maintaining environmental and safety ratings.
• Reinforced optic window supports thermal, visual and UV inspections through a closed cabinet.
• Stainless-steel frame and durable latch system ensure long-term mechanical stability.
• Designed to reduce arc-flash exposure risk by allowing inspections without opening the panel.
• Quick-install mount supports retrofit applications on existing switchgear and distribution panels.

Perfect for Electrical-Panel Condition Monitoring

The CV400 is built to support field teams that rely on frequent infrared and visual surveys. The window helps maintain original enclosure ratings, enabling safe inspections during live-system checks where system uptime and operator safety must be preserved. Its compact, secure design integrates smoothly into switchboards, MCCs and distribution cabinets across commercial and industrial facilities.

Wide Application Range

• Routine thermographic surveys of switchgear, circuit breakers and motor-control centres.
• Condition monitoring inside sealed NEMA 12 and NEMA 4 electrical enclosures.
• Reducing arc-flash risk by enabling inspections without opening live panels.
• Periodic IR or visual checks of busbars, terminations, fuses and power-distribution hardware.
• Maintenance programmes in industrial plants, utilities, and commercial electrical systems.

For more information please check the datasheets.