Product selection guide: IR windows

Use our product selection guide to find the IR window that fits your needs best.
Fluke 050 clkt 1b
Fluke CV400 1A KO
Fluke 050 CLKT IR Window for Outdoor and Indoor ApplicationsFluke CV400 ClirVu® 95 mm (4 in) Infrared Window
Size50 mm (2 in)95 mm (4 in) 
Voltage rangeAnyAny 
NEMA environment typeType 3/12Type 4/12 (indoor/outdoor) 
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 KEMA63 kA for 30 cycles @ 60 Hz at KEMA 
UL 50 V component recognition   
UL 50/NEMA environmental ratingNEMA type 3/12NEMA type 4/12 
CSA C22.2 No.   
CSA type ratingType 3/12Type 4 
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 required43.2 mm (1.7 in)115.42 mm (4.544 in) 
Greenlee punch kit - punch/die06974/04013742BB = 2984AV / 2983AV 
Door latchHand turnHand turn 
Install time10 minutes5 minutes or less 
Optic insert diameter50 mm (2 in)95 mm (3.74 in) 
WarrantyLifetime replacement against manufacturing defectsLifetime replacement against manufacturing defects 
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