ISA
Phone: 919.549.8411
Fax: 919.549.8288
E-mail: info@isa.org
http://www.isa.org/
Select "Education and Training" on the menu bar.

National Institute for Certification in Engineering Technologies
Phone: 888.476.4238
http://www.nicet.org/
Select "Certificants" to see the requirements for being certified as a technician in Industrial Instrumentation.