UL Subject 521
Original price was: $114.61.$57.00Current price is: $57.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 10/27/2017)
Underwriters Laboratories , 10/27/2017
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UL Subject 521
Original price was: $215.54.$107.00Current price is: $107.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 1/30/2015)
Underwriters Laboratories , 01/30/2015
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UL Subject 521
Original price was: $255.52.$127.00Current price is: $127.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 8/22/2014)
Underwriters Laboratories , 08/22/2014
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UL Subject 521
Original price was: $118.83.$59.00Current price is: $59.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 5/1/2014)
Underwriters Laboratories , 05/01/2014
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UL Subject 521
Original price was: $130.54.$65.00Current price is: $65.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (Bulletin, 7/7/2010)
Underwriters Laboratories , 07/07/2010
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UL Subject 521
Original price was: $105.40.$52.00Current price is: $52.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 8/14/2009)
Underwriters Laboratories , 08/14/2009
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UL Subject 521
Original price was: $186.90.$93.00Current price is: $93.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 10/2/2009)
Underwriters Laboratories , 10/02/2009
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UL Subject 521
Original price was: $279.42.$139.00Current price is: $139.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 4/16/2009)
Underwriters Laboratories , 04/16/2009
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UL Subject 521
Original price was: $158.01.$79.00Current price is: $79.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (CSDS Proposal, 1/18/2008)
Underwriters Laboratories , 01/18/2008
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UL Subject 521
Original price was: $263.33.$131.00Current price is: $131.00.
Standard for Heat Detectors for Fire Protective Signaling Systems (Bulletin, 10/19/2001)
Underwriters Laboratories , 10/19/2001
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