Welcome to Test4Less


Available for orders over £100


Apply for a credit account


Free gifts and exclusive benefits


Elevate your skills with us


Exclusive offers, shop today


For all orders over £100


Professional support


On many products


Enjoy Exclusive Benefits


Elevate Your Skills

Fluke CV301 ClirVu 75 mm (3 inch) Locking Infrared Window

SKU NEW_CODE120 Categories ,
  • Ultimate protection for the electricians, engineers and inspectors
  • Perfect for very hot and very cold environments.
  • Exclusive to Fluke infrared windows
  • Security Key Access
Free Shipping

Spend over £100 on any new goods order and receive automatic free shipping


Points make purchases! For every £1 spent, earn back 1p that can be spent on any future new goods purchase

Our Price Promise

We offer a Price Match Promise! Find an equivalent tester for a cheaper price on a competitor site, and we’ll do our best to match it

Express Delivery & Calibration

Express Delivery is currently unavailable for customers wishing to add calibration to their New Goods order. For more information, visit our Delivery Information page. 

£327.81 (ex VAT)

£393.37 (inc VAT)

Earn 327 points

Usually Ships In 3 to 5 Business Days

Fluke CV301 ClirVu 75 mm (3 inch) Locking Infrared Window

A company’s greatest investment is not the equipment that’s behind the panel door; top priority is to offer the ultimate protection for the electricians, engineers and inspectors who risk their lives every day doing their jobs.

The ClirVu coating – 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 infrared window is delivered with an identification plate attached for unique, on-site numbering for rapid location confirmation and faster repairs.

If you don’t need a security key access option see the CV300 IR Window.

The CV Series of infrared windows are also available in 50 mm (2 in) and 95 mm (4 in) sizes.

Installs and grounds in less than 5 minutes

  • One technician
  • One hole with standard Greenlee punch
  • Panel door does not need to be removed
  • Grounds instantly to metal enclosure with patent-pending AutoGroundT process
  • Maintains panel arc test ratings up to 63kA when properly installed

Work more efficiently with Fluke ClirVu CV301 75 mm (3 in) Infrared Windows

  • NFPA 70E processes significantly reduced due to less work permit requirements
  • Faster and more comfortable inspections because full PPE is often not required
  • Reduce the risk of arc-flash and electrocution, increase the safety of your personnel and reduce the time and cost of preventive maintenance
  • CV301 is Torture TestedT to the highest arc blast 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
  • Convenience of both quick turn or security keyed access

General Specifications:

  • Size: 75 mm (3 in)
  • Voltage range: Any
  • NEMA environment type: Type 4/12 (indoor/outdoor)
  • AutoGroundT: Yes
  • ClirVu optic: Yes
  • 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: Yes
  • Cover and fastener permanently attached: Yes
  • Single-hole install: Yes
  • Hand turn and security key door latch options: Yes
  • Visual inspection and fusion capable: Yes
  • Short/Mid/Long-wave IR and UV capable: Yes

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: 89.89 mm (3.539 in)
  • Greenlee punch kit = punch/die: 739BB = 1431AV/1432AV
  • Recommended max panel thickness: 10 gauge
  • Overall window height: 141.5 mm (5.57 in)
  • Overall window width: 111.5 mm (4.39 in)
  • Overall window thickness: 16.2 mm (0.64 in)
  • Door latch: Security Key


  • Optic insert diameter: 75 mm (2.96 in)
  • Viewing aperture diameter: 67.95 mm (2.675 in)
  • Viewing aperture area: 3626 sq.mm (5.62 sq. in)
  • Thickness: 2 mm (0.08 in)

Warranty: Lifetime replacement against manufacturing defects

What’s included?

  • 3 in (75 mm) IR Window
  • Security key door latch
  • Warranty statement
  • Fluke IR Windows are complete, assembled and ready for installation


There are no reviews yet.

Be the first to review “Fluke CV301 ClirVu 75 mm (3 inch) Locking Infrared Window”


Product Question
Plain text only. HTML is not allowed.


Write Your Own Review


There are no reviews yet.

Be the first to review “Fluke CV301 ClirVu 75 mm (3 inch) Locking Infrared Window”

Related Products

You may also like…