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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 075 clkt 1b
Fluke CV401 2A Ko
Fluke 075 CLKT IR Window for Outdoor and Indoor ApplicationsFluke CV401 ClirVu® 95 mm (4 in) Infrared Window
Size75 mm (3 in)96 mm (4 in) 
Voltage rangeAnyAny 
NEMA environment typeType 3/12Type 4/12 (indoor/outdoor) 
AutoGround™   
ClirVu® Optic   
Operating temperature-40 °C to +232 °C (-40 °F to +450 °F)-40 °C to +232 °C (-40 °F to +450 °F) and +260 °C (+500 °F) intermittent 
Arc-tested (IEEE C27.20.7)60 kA for 30 cycles @ 60 Hz at KEMA64 kA for 30 cycles @ 60 Hz at KEMA 
UL 50 V component recognition   
UL 50/NEMA environmental ratingNEMA type 3/12NEMA type 4/13 
CSA C22.2 No.   
CSA type ratingType 3/12Type 5 
IP ratingIP 55IP 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 ratingIEC60068-2-6IEC60068-2-6 at TUV 
Humidity rateIEC60068-2-3IEC60068-2-3 at TUV 
UL 1558  
Actual mounting hole diameter required69.9 mm (2.75 in)115.42 mm (4.544 in) 
Greenlee punch kit - punch/die04247/04246742BB = 2984AV / 2983AV 
Door latchHand turnSecurity key 
Install time10 minutes6 minutes or less 
Optic insert diameter75 mm (3 in)96 mm (3.74 in) 
WarrantyLifetime replacement against manufacturing defectsLifetime replacement against manufacturing defects