Home/ISA/ISA TR12.21.01-2004 (R2013) PDF ISA TR12.21.01-2004 (R2013) PDF$104.00 $62.00 Use of Fiber Optic Systems in Class I Hazardous (Classified) Locationsstandard by The International Society of Automation, 08/15/2004 Document Format: PDF ISA TR12.21.01-2004 (R2013) PDF quantity Add to cart Description Description Product Details Published: 08/15/2004 ANSI: ANSI Approved Number of Pages: 30 Related products ISA TR84.00.07-2018 PDF $151.00 $91.00 Add to cart ISA TR84.00.09-2017 PDF $248.00 $149.00 Add to cart ISA TR92.00.03-2014 PDF $83.00 $50.00 Add to cart ISA TR84.00.05-2009 PDF $151.00 $91.00 Add to cart