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

The Fluke CV401 is a compact infrared inspection window designed to provide safe access to internal components of NEMA 12 and NEMA 4 industrial enclosures. It enables thermographic and visual inspections without opening energised panels, reducing arc-flash risk and maintaining compliance with electrical safety protocols. The reinforced polymer housing and secure locking mechanism ensure long-term durability in plant environments, switch rooms, and other heavy-duty service locations.

Core Features and Benefits of the Fluke Inspection Window for  NEMA 12 & 4 Enclosure

• Supports infrared and visual inspections without opening energised electrical enclosures.
• Compliant with NEMA 12 and NEMA 4 ratings for dust, water and industrial contaminant protection.
• Reinforced polymer construction resists mechanical impact and harsh facility conditions.
• Transparent IR-transmissive optic compatible with most thermal imaging cameras.
• Secure quarter-turn locking mechanism improves safety during routine inspections.
• 147.1 × 23 × 189.3 mm size fits familiar switchgear and motor-control-centre layouts.

Engineered for Safe Electrical Diagnostics

The CV401 is built to support maintenance teams that conduct frequent thermal surveys on live equipment. Its IR-transmissive window enables cameras to catch internal temperature profiles while keeping enclosure doors closed, limiting operator exposure to electrical hazards. The housing provides a tight environmental seal suitable for industrial areas with dust, moisture or airborne contaminants.

Versatile Uses of this Inspection Window

• Thermal scanning of MCC panels, switchgear sections and power-distribution enclosures.
• Routine predictive-maintenance inspections in manufacturing plants and processing facilities.
• Temperature monitoring of feeder cables, terminations and internal bus assemblies.
• Electrical safety programs requiring reduced arc-flash exposure during infrared surveys.
• Utility, commercial building and industrial environments where sealed enclosures are mandatory.

For more information please check the datasheets.