Online Training Courses

Troxler Learning Center Online

Are you interested in taking online training courses?

Click here to register or access your account at Troxler Learning Center.

If you are already logged in and have an account, go to your Dashboard, there is the Troxler Learning Center icon (pictured below) that will direct you to our Learning Center.

Benefits of the Troxler Learning Center include:

  • Improved Speed and Efficiency
  • Download and reprint certificates from your User dashboard for courses completed in the last five years.
  • Companies with multiple users can have an administrator. The administrator can:
    • ​Create user accounts for employees
    • Purchase courses and have visibility to course enrollment for users
    • Reprint your employee’s certificates (for courses taken within the past five years)

Contact Troxler at 1-877-876-9537 for Technical Support for more information.

We offer the online training courses listed below. Enroll today by registering today!


New! Nuclear Gauge User Training- 3400 Series – $27

Online training course on the proper use of Troxler’s 3400 series nuclear density gauges.


Radiation Safety Officer Certification Course — $295

All attendees must first complete a Nuclear Gauge Operator Safety and Hazmat Course. A packet of handouts is provided for assistance during the course and for future reference. Participants are encouraged to take notes during the lessons. A short quiz is given at the end of each lesson to test for comprehension of the information. A certification of successful completion can be printed and/or saved to your computer.

Topics covered include:

  • Review of radiological fundamentals
  • Radiological protection regulatory requirements
  • Gauge storage
  • Transportation regulations
  • Personnel monitoring
  • Record keeping
  • Leak testing
  • Accident response
  • Gauge maintenance

Nuclear Gauge Operator Safety Training Course plus Hazmat — $129

This course is for nuclear moisture density gauge operators. This course provides the certification required to operate and transport nuclear moisture density gauges. A quiz will be given at the end and a certificate issued with a passing score.

Topics covered include:

  • Radiation safety fundamentals and principles
  • Regulatory requirements
  • Portable gauge theory, design, and operation
  • Gauge maintenance and troubleshooting
  • Operating, emergency, maintenance, and transportation procedures
  • Leak testing
  • Storing, packaging, and transporting gauges
  • This course satisfies US DOT training requirements of 49 CFR 172, subpart H (Hazmat) for individuals shipping or transporting hazardous materials. Recurrent training is required every 3 years.

Accepted States:
This course is presently accepted in the following states and US territories:
AL, AK, AR, AZ, CA, CO, CT, DE, DC, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, OH, OK, OR, PA, PR, SC, SD, TN, TX, UT*, VA, VT, VI, WA, WI, WV, WY

* With license amendment to allow RSO or other qualified person to conduct practical skills training. Individual states may have additional requirements. Click for state contact information.


Hazmat Certification / Hazmat Re-Certification — $49

This course is for Hazmat transportation certification/ recertification. It can be taken to renew your Hazmat certification (every 3 years) or for individuals who may need to transport nuclear gauges, but not operate them.

This course satisfies US DOT training requirements of 49 CFR 172, subpart H (Hazmat) for individuals shipping or transporting hazardous materials. Recurrent training is required every 3 years.


Radiation Safety Refresher Course for Nuclear Gauge Operators — $49

This course is designed as an annual safety refresher for nuclear gauge operators who are in a state where an annual safety recertification is required by the licensing agency. This should not be taken by new nuclear gauge operators. The Nuclear Gauge Safety Training Course with Hazmat is the initial course for new operators.

Topics covered include:

  • Radiation safety refresher
  • New regulatory requirements
  • Operating, emergency, maintenance, and transportation procedures

Compaction & Density Testing — $29

This course is designed to teach you the basic principles of compaction and density testing methods, with emphasis on nuclear testing methods.

Topics covered include:

  • Why we compact asphalt, soil, sand, aggregate, etc.
  • Factors to consider when compacting
  • Terms related to density testing of soil and asphalt
  • Overview of the various methods used for measuring compaction
  • Theory behind nuclear gauge measurements of moisture and density
  • Proper methods of nuclear gauge operation