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Product selection guide: IR windows

Use our product selection guide to find the IR window that fits your needs best.
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Fluke CV301 2A KO
F CV201 02A KO
Fluke CV301 ClirVu® 75 mm (3 in) Infrared WindowFluke CV201 ClirVu® 50 mm (2 in) Infrared Window
Size76 mm (3 in)51 mm (2 in) 
Voltage rangeAnyAny 
NEMA environment typeType 4/12 (indoor/outdoor)Type 4/12 (indoor/outdoor) 
AutoGround™   
ClirVu® Optic   
Operating temperature-40 °C to +232 °C (-40 °F to +450 °F) and +260 °C (+500 °F) intermittent-40 °C to +232 °C (-40 °F to +450 °F) 
Arc-tested (IEEE C27.20.7)66 kA for 30 cycles @ 60 Hz at KEMA68 kA for 30 cycles @ 60 Hz at KEMA 
UL 50/NEMA environmental ratingNEMA type 4/15NEMA type 4/17 
UL 1558   
CSA C22.2 No.   
CSA type ratingType 7Type 9 
IP ratingIP 67 at TUVIP 67 at TUV 
Lloyd's RegisterUp to 11 kV marine switchgear, indoor or outdoor (offshore only)Up to 11 kV marine switchgear, indoor or outdoor (offshore only) 
Vibration ratingIEC60068-2-6 at TUVIEC60068-2-6 
Humidity rateIEC60068-2-3 at TUVIEC60068-2-3 
UL 50 V component recognition  
Actual mounting hole diameter required89.89 mm (3.539 in)61.37 mm (2.416 in) 
Greenlee punch kit - punch/die739BB = 1431AV / 1432AV76BB = 441AV / 442AV 
Door latchSecurity keySecurity key 
Install time8 minutes or less10 minutes or less 
Optic insert diameter76 mm (2.96 in)51 mm (1.97 in) 
WarrantyLifetime replacement against manufacturing defectsLifetime replacement against manufacturing defects