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Portable Nuclear Gauge Training Center

Official On-Line Training for all Portable Nuclear Density Gauges,
including InstroTek, CPN, Humboldt, Seaman and Troxler Nuclear Gauges.
Accepted Everywhere, Every State

American Portable Nuclear Gauge Association provides a website and association focused on portable nuclear gauge owners and operators. We strive to offer the most in-depth and comprehensive coverage of regulations, issues, references and resources to cover material pertaining to moisture density gauges.

Our Online/Internet Gauge Safety Certification Class fully meets the training requirements to become a gauge operator.  All APNGA classes integrate regulatory and training materials directly from the NRC, Agreement States and U.S. D.O.T., and are the most in-depth and affordable courses on the market today.


Taking a Course YOURSELF by Purchasing it Directly or Redeeming a Credit Code

Follow These Steps:
Visit our CLASSES Page. (Be sure any previous user is logged OUT first)
Add courses to your cart.
Pay by credit card or redeem Course Credits.
Click the COURSE LOGIN button above the APNGA website header.
Login using your email and password.
(Click the ``I lost my password`` link on the login page if you do not have a password. Then check your email to reset it.)
Click on your course(s) to attend.
Print your certificate when you finish. (Be sure YOU and your RSO retain a copy of your signed certificates. APNGA is NOT responsible for providing copies of your certificates).

IMPORTANT NOTE:  Be sure to check your spam folder for your login link and initial account password.  You can change or reset your password at any time by clicking the course login button, then clicking the “I lost my password” link.

IMPORTANT NOTE 2: If you are given a MULTI-PACK code or a GROUP MULTI-PACK code by your RSO, use it to enroll in the $49 class option).  Group Multi-Pack Codes begin with the letters “GRP-” or “grp-“.

IMPORTANT NOTE 3: User ID and passcode combinations from our previous website will not work as login credentials on this website.  Use them as a voucher code on this website by entering them as a coupon code in the following format: olduserid-oldpasscode.  Codes issued prior to September 2020 will need to be replaced using the Legacy Code replacement form.

You can click on the “ATOM” button in the bottom right corner to Log IN or Log OUT.

Atom Symbol

RSO's and Purchasing Agents Purchasing Courses for SOMEONE ELSE

Follow These Steps:
Ensure each person has THEIR OWN email address to log into their courses.
Click the ``PURCHASE CREDITS for Employees`` button above (top of this web page) next to the gauge picture.
Add Course CREDITS to your cart.
Pay by credit card (check out).
Your Course Credit vouchers/coupons are emailed to you. (Check your spam folder).
Give the Course Credit Voucher codes to your people. (See Note #2 below)
Have your people REDEEM their voucher codes using the instructions to the left.
DO NOT try to redeem your people's codes for them while you are logged into your own account. (SEE NOTE #3 BELOW).

IMPORTANT NOTE:  Voucher Codes for the GROUP Multi-Pack (5 courses for 5 people) will be a single code for 5 courses, valid for 5 uses.  Give this one code to each of the five people who will be enrolling in the five classes.

IMPORTANT NOTE 2: Your voucher code(s) will be at the bottom of the “Order Complete” email you receive.  Check your spam folder.  You may also find your code(s) by logging into your APNGA account (use the Course Login button) and clicking on the “Orders” button at the bottom of your profile page.

IMPORTANT NOTE 3:  DO NOT set up your people’s enrollments for them while you are logged into your own account.   EACH PERSON must have their own account.  If you attempt to redeem their code while you are logged into your own account, you will be overwriting YOUR profile information rather than creating THEIRS.  Each user must have their own account with their own email address, and you can not enroll them when logged in as yourself.  Be sure you are LOGGED OUT before trying to help them redeem their codes.

Optimize Your Productivity and Cost Effectiveness!

The accessibility and flexibility of our Internet classes allows the viewer to spend as much time as needed to fully prepare for and comprehend the required Gauge Safety and U.S. D.O.T. classes and tests.

Companies keep their employees in-house and on the job, saving significant money on travel and training costs.


Looking for Regulations & Contacts
for a Specific State?

View My State

Need HELP? Start HERE!

Want to purchase courses?
Watch this short video first!

Already Logged In?

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Remember to LOG OUT when you’re done,
so nobody overwrites your progress!

Have a Code from Our OLD Site?

Usernames and Passcodes from our OLD website
will not work here.  But we have converted them.

If you have a valid, non-expired course UserID and passcode from our OLD website, it will not work on our NEW website.

We converted old (legacy) UserID/passcode combinations to become course voucher codes.  If you purchased your courses from our old site after Sep 1, 2020, follow the following instructions:

  • Visit our Classes Page.
  • In Section A of the page, add your class to the shopping cart.
  • Use your old UserID and Passcode (separated by a dash) as a coupon code to enroll in the class at 100% off.
    ( Example: RAD5124-A33KJ3M )
  • Click on Course Login and take your class.

If you purchased from our old site prior to Sep 1, 2020 and have not completed your course, use the form below to retrieve a new course voucher code.

We will replace it at no cost.

Still Having Trouble Using an Old Code?

Send us your old code.  We’ll send you a new one.

If you have a valid, non-expired course UserID and passcode from our OLD website and the course voucher conversion above does not work for you, simply provide your name, email address, and UserID/passcode combination in the form below, and we will send you a replacement code for course enrollment.

PLEASE ALLOW 48 HOURS to receive your replacement code.