Increase the safety and speed of indoor and outdoor electrical thermography with these UL and CSA certified IR Windows. These IR Windows come in three diameters: 2", 3" or 4".

Fluke IR Windows are the most rugged on the market, with a heavy duty aluminum housing and arc-flash resistance to increase safety when conducting thermal inspections.

With a Kwik Twist cover that magnetically sticks to the panel when removed, Fluke IR Windows are easy to use and deliver unmatched image clarity through a CLIRVU® crystal. Exclusive to Fluke IR Windows, CLIRVU crystal technology is impervious to both moisture and vibration. CLIRVU crystals are designed to withstand the extreme pressures and temperatures of an arc-fault event, and offer protection from molten projectiles associated with arc-flashes.

• Engineered and tested to withstand electric-arcs up to 50 kA for30 cycles.
• Certified by UL & CSA for Type 3/12 (Outdoor) environments in North America, these C-Range windows are tested to withstand the long term aging effects of UV exposure.
• Certified by SIRA Certification IP65 (Outdoor) environments in Europe.
• The CLIRVU® coating—exclusive to Fluke IR Windows—seals the optic prior to assembly to protect against moisture degradation.
• Own a Fluke Camera? The Quadraband™ optic is IR-Fusion® compatible, allowing the thermographer to see potential problems in visual light and thermographic mode.
• Got more than one window per panel? Each C-Range window is delivered with an identification plate attached for unique, on-site numbering for rapid location confirmation and faster repairs.
• Each infrared window comes complete with a security access key, installation instructions and self-adhesive drilling template.

  Detailed Specifications Optic data Crystal insert diameter 3460346 FLK-050-CLKT: 50 mm (1.97 in) 3460387 FLK-075-CLKT: 75 mm (2.96 in) 3460439 FLK-100-CLKT: 100 mm (3.94 in) Viewing aperture diameter 3460346 FLK-050-CLKT: 43 mm (1.7 in) 3460387 FLK-075-CLKT: 68 mm (2.7 in) 3460439 FLK-100-CLKT: 89 mm (3.5 in) Viewing aperture area 3460346 FLK-050-CLKT: 1452 mm2 (2.25 sq in) 3460387 FLK-075-CLKT: 3632 mm2 (5.63 sq in) 3460439 FLK-100-CLKT: 6322 mm2 (9.79 sq in) Thickness 3460346 FLK-050-CLKT: 2 mm (0.08 in) 3460387 FLK-075-CLKT: 2 mm (0.08 in) 3460439 FLK-100-CLKT: 4 mm (0.16 in) CLIRVU coating 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Shortwave IR capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Midwave IR capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Longwave IR capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Ultraviolet (UV) capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Visual capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Fusion capable 3460346 FLK-050-CLKT: Yes 3460387 FLK-075-CLKT: Yes 3460439 FLK-100-CLKT: Yes Underwriters Laboratories (UL) recognized Yes UL50 environmental Type 3/12 UL746C N/A (Polymer Free) UL94 N/A (Polymer Free) Canadian Standards Association (CSA) approval Yes Environmental Type 3/12 KEMA (Arc-Testing) ANSI C37.20.7 50 kA for 30 cycles @60 Hz EEMACS 14-1 Type-B 40 kA for 30 cycles @60 Hz ASTA (Arc-Testing) IEC 62271 20 kA for 5 cycles @50 Hz TUV Cyclic humidity withstand Yes Vibration withstand Yes NEMKO Resistance of insulating materials to 100° Yes Resistance of insulating material to ball pressure (Brinell) Yes Glow-wire test 650 °C Yes Lloyds Register Up to 11 kV marine switchgear, indoor or outdoor Yes General Specifications Maximum temperature Gaskets: 250 °C (482 °F) Body: 659 °C (1219 °F) Optic: 1400 °C (2552 °F) Gaskets Low smoke and fume (LSF) compliant silicone IP rating IP65 NEMA rating Type 3/12 (UL and CSA Third Party Certified) Vibration rating IEC60068-2-6 Humidity rating IEC60068-2-3 Pull-out strength Up to 630 kg (1388 lb) Warranty Lifetime replacement against manufacturing defects