- Alpha Sciences, Inc.
 - Provides alpha particle detection and measurement systems and services for the semiconductor and materials industries. - Bicron Corporation
- Advanced radiation detection products and high performance crystal optics.
- Centronic Limited
- Manufactures sensors for photonic and ionising radiations. Products include silicon photodetectors, diamond film sensors, Geiger Muller tubes and neutron detectors.
- Direct Scientific
- Offers nuclear instrumentation, shielding, sources, and accessories.
- Gamma-Scout
- Portable handheld Geiger counter.
- Harwell Dosimeters Limited
- Manufactures dosimeters, which process and register doses of radiation, mainly for use in the sterilization of medical equipment.
- iDetect Technology
- Manufactures microwave-guard, an instrument that detects microwave leakage.
- Integrated Environmental Management, Inc.
- Provides strategic consulting on issues pertaining to radiation, radioactivity, health physics, nuclear science, and the environment.
- Landauer
- Provider of analytical services to determine personnel exposure to occupational and environmental radiation hazards in the workplace and home.
- Middleton Solar Instruments
- Solar radiation sensors used in meteorological and agricultural research.
- NDS Products Inc
- Manufacturer of nuclear radiation detection instruments.
- Radar Electromagnetic Stabilizer
- Test daily exposure to mobile phone radiation or other forms of electromagnetic radiation to see if protection is needed.
- Radiation Safety Engineering
- RSE offers medical and health physics services, radiation detection instruments, radiochemical analysis and radiation safety training courses.
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