Ionizing Radiation Standards, Canadian Institute for National Measurement Standards
As Canada's primary centre of reference for the accuracy, validity and traceability of physical and chemical measurements, NRC-INMS anchors the national measurement system and provides a fundamental technical infrastructure that supports Canadian industry and the Canadian public.
http://inms-ienm.nrc-cnrc.gc.ca/research/ionizing_radiation_e.html

Atmospheric Radiation Measurement (ARM) Program
The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy (DOE).
http://www.arm.gov/

Radiation Safety Network
Home page for the Radiation Safety Network. The site is designed to assist radiation safety officers and radiation users in complying with radiation regulatory requirements.
http://www.radiationsafety.net/

Midwest Radiation Consultants
Offers physics and technology consulting for healthcare providers; services include radiology, nuclear medicine, radiation therapy and radiation safety.
http://midwestradiation.com/

Integrity Design and Research Co.
Integrity Design and Research Co. high quality instrumentation for ELF AC and DC measurement. Customers include Federal Government Agencies. NASA FDA US NAVY.. Magnetic Measurement Instrumentation.
http://www.gaussmeter.info/

Observatory and World Radiation Center (PMOD/WRC), Switzerland
Global research results using solar irradiance and atmospheric radiation measurement equipment. Contributions to various space experiments.
http://www.pmodwrc.ch/

Mound Technical Solutions
Radiation measurement instrumentation, systems design, development and manufacturing. Specializes in Tritium measurement.
http://www.moundtech.com/

ORTEC
ORTEC is an industry leader in the design and manufacture of advanced high purity germanium and silicon detectors for gamma rays and charged particles respectively. The ORTEC brand name is synonymus with quality and innovation in nuclear instrumentation.
http://www.ortec-online.com/

UIC - Radiation and Life
World Nuclear Association is the global private-sector organization that seeks to promote and provide information on nuclear power, nuclear energy, nuclear power, Chernobyl, uranium, nuclear power plants, radiation, nuclear energy information, nuclear news, nuclear option, nuclear power plant, nuclear reactors, nuclear consultancy, nuclear plants, nuclear waste disposal
http://www.uic.com.au/ral.htm

Bitt Technology
Manufacturer of systems for measurement of airborne environmental radiation. Offers planning, construction, maintenance and training for these systems.
http://www.bitt.at