Fluke CV400
4 in (95 mm) ClirVu Infrared Window with Hand Turn Door Latch

  • No more removing the panel door for installation
  • Work permit requirements and NFPA 70E processes are significantly reduced
  • Full PPE is often not required so inspections are done faster and more comfortable
  • Superior arc blast protection:
    • High temperature silicon gaskets
    • Mounting and door latches provide high pressure gasket compression
    • Die cast components are manufactured with the highest strength alloys
    • Jam nut screws are made from 4037 steel, heat treated to 160,000 psi tensile
  • Torture Tested to the highest test ratings
    • IEEE C37.20.7 63 kA Arc tested at KEMA, UL 50/50E/50V, UL1558, IEC60529-1: IP67, IEC 60068, NEMA 4/12, CSA C22.2 NO. 14-13:2012, and CE
  • Quick and easy installation
    • Installation takes 5 minutes with one technician
    • Only one hole necessary with standard Greenlee punch. Rear access required for punch connection only (Easily accomplished with one technician)
    • Installs from front; no template needed; no rear access required
    • Grounds instantly to metal enclosure with patent pending AutoGround process
    • Sharp teeth on jam nuts assure four gas-tight ground connections
    • All components have electrically conductive finishes for optimum grounding
  • Quarter turn latch easily opens hinged cover
  • Corrosion and UV resistance for challenging outdoor environments
  • Lifetime replacement Warranty against manufacturing defects
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Product Information
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Compliance without compromise. Safety without sacrifice.
Increase the safety and speed of electri-cal thermal imaging inspections with the new Fluke ClirVu IR Windows. Reduce the risk of arc-flash and electrocution, increase the safety of your personnel and reduce the time and cost of preventive maintenance.

Fluke Infrared (IR) Windows make it easier to comply with the NFPA 70E safety standard. Their arc-resistant crystal optics are engineered and tested to withstand the extreme pressures and temperatures of an electric arc-fault event up to 63 kA.

Even more remarkable is their AutoGround feature, exclusive to Fluke, that automatically grounds the Fluke IR Window upon installation, without any additional steps or testing. The Auto-Ground feature enhances worker safety and eliminates the need to separately ground each metal component of the window.

The clear advantage for thermal imaging
Fluke offers three IR windows, all of which are UL and CSA certified. The Fluke C400 is certified for use both outdoor and indoor. The Fluke CV400 feature the exclusive Fluke ClirVu coating that seals the entire crystal optic—including the edges—making it impervious to moisture and vibration and protecting it from the aging effects of UV expo-sure. ClirVu optics are insoluble and guaranteed never to degrade even when exposed to mild acids or alkalis. Of the thousands of Fluke CV-400 IR Windows installed — many in very challenging environments—not one has been returned due to moisture or transmission degradation.

The antistatic properties of the Fluke CV400's ClirVu coating also help repel dust and grime to keep both sides of the window clean for better IR transmission. As a result, the Fluke CV400 transmit up to 96 percent of the energy emitted, producing a more detailed image.

Not only do Fluke IR Windows deliver a clearer view of the equipment being inspected, they also present a larger viewing area than other windows on the market. Since the entire area of the crystal optic is available for infrared transmission, it provides optimum repeatable results. The Fluke CV/400 also provides a better view for visible light inspections.

Maximum inspection flexibility
Fluke is the only IR Window with Quadraband multispectral optics that support most popular camera brands and IR, UV, and visual inspection modes. That means you can change your camera without having to change your IR Windows. Quadraband optics transmit electromagnetic radiation in:
  • Longwave infrared
  • Midwave infrared
  • Visual
  • UVA and UVB ultraviolet

Increased efficiency, decreased costs
Fluke IR Windows can save costs every step of the way. The Fluke CV-400 takes just one person about 5 minutes to install a Fluke IR Window. The Fluke CV 400 helps to minimize installation labor costs and system downtime. Just power down, remove the panel cover, position the window using the included template, drill the hole, and affix the window with three self-tapping screws. Because all the mounting hardware attaches to the outside of the panel there are no parts inside that can work loose and cause a short.

Once installed, Fluke IR Windows increase efficiency because main-tenance professionals can perform inspections quickly without requiring electricians to reduce the power and remove the panel cover. Inspections through IR Windows are conducted at full power, so you don’t lose any production time. The decreased arc-flash risk provided by Fluke arc-resistant, ClirVu coated optics also may reduce insurance costs.

The ClirVu coating
The Fluke CV400 festures the exclusive to Fluke infrared windows - seals the optic prior to assembly to protect against moisture degradation making it perfect for very hot and very cold environments. Each Fluke CV/400 infrared window is delivered with an identification plate attached for unique, on-site numbering for rapid location confirmation and faster repairs.

Size 95 mm (3.74 in)
Voltage range Any
NEMA environment type Type 4/12 (indoor/outdoor)
AutoGround Included
ClirVu optic Included
Operating temperature -40°C to +232°C (-40°F to +450°F) and +260°C (500°F) Intermittent
Compatible with all Fluke cameras Yes
Jam nut locking system Included
Cover and fastener permanently attached Included
Single-hole install Included
Hand turn and security key door latch options Included
Visual inspection and fusion capable Included
Short/Mid/Long-wave IR and UV capable Included
Ratings and testing
Arc-tested (IEEE C37.20.7) 63 kA for 30 cycles @ 60 Hz at KEMA
UL 50V component recognition Yes
UL 50 /NEMA environmental rating NEMA Type 4/12
UL1558 Yes
CSA C22.2 No. Yes
CSA type rating Type 4
IP rating IP67 at TUV
Lloyds register Up to 11 kV marine switchgear, indoor or outdoor (offshore only)
Vibration rating IEC60068-2-6 at TUV
Humidity rating IEC60068-2-3 at TUV
Actual mounting hole diameter required 115.42 mm (3.539 in)
Greenlee punch kit = punch/die 742BB = 2984AV/2983AV
Recommended max panel thickness 10 gage
Overall window height 189.3 mm (7.45 in)
Overall window Width 147.1 mm (5.79 in)
Overall window thickness 23 mm (0.90 in)
Door latch Hand Turn
Optic insert diameter 95 mm (3.74 in)
Viewing aperture diameter 87.63 mm (3.45 in)
Viewing aperture area 6032 sq.mm (9.35 sq. in)
Thickness 4 mm (0.16 in)
Ordering Information
Model Description Buy Now Price
MFR ID: 4326996
Fluke CV400 4 in (95 mm) ClirVu Infrared Window with Hand Turn Door Latch Buy Now Sale $449.99
(Reg. $499.99)
Included Accessories
  • 1 - Self-adhesive drilling template
  • 1 - Warranty statement