APNGA | Online Portable Nuclear Gauge Classes2026-08-15T18:26:25-07:00

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.

Portable Nuclear Density Gauges
APNGA Accepted States

Optimize Your Productivity and Cost Effectiveness!

The accessibility and flexibility of our Internet classes allow 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.

Got Questions about Our Courses?
Need Help?  Click on Our Frequently Asked Questions (FAQs) Below:

How do I get live support? Is there a phone number?2026-08-10T14:49:49-07:00

To streamline and prioritize support, (especially during COVID-19 contingencies), APNGA provides email tech support.

We also offer LIVE CHAT SUPPORT when an admin is online. Check the bottom of the APNGA ChatBot window to see if the LiveChat icon is showing.  If it is showing, it means that LiveChat may be available.   LiveChat is not guaranteed to be available.  If you enter the LiveChat area and do not receive a response within a few minutes, it’s possible that the admin is logged in but not readily available to chat.

If your chat request is not responded to, many common issues can be answered with the APNGA ChatBot app.  Ask your question in the ChatBot by clicking near the bottom on the words where it says “Send a Message“.  If you find the answer you need, AWESOME!   If you don’t, then send us an email via the Contact Form at the bottom of the web page.  When using the form, provide DETAILS.  We can’t answer blank forms or forms with nothing but the name of a course.  Examples of GOOD and BAD form submissions:

  • Example of Good Form Submission: I can’t log into my APNGA account.  My login email is xyz@email.com.  I’ve clicked “lost password” but didn’t receive a link.
  • Example of Good Form Submission: I’m having trouble redeeming my login.  My username is SAF-3JDLI8D97J-A.  The order number was #82832.  It was ordered by John Doe on August 2, 2026.
  • Example of Good Form Submission: I purchased a username/passcode in the old system.  The username is: APNGA39394.  The passcode is: 3KF8DN.  It was ordered on August 5, 2026.
  • Example of Good Form Submission: My certificate was printed with John Doe’s name on it.  My name is Joe Smith.  My course order number was #81544.  Jane Jones enrolled me in the course on August 2, 2026.
  • Example of Bad Form Submission: Gauge Safety Course.
  • Example of Bad Form Submission: I can’t login.
  • Example of Bad Form Submission: Call me at 717-555-1212.
  • Example of Bad Form Submission: Need my certificate.

When we receive Contact Forms or emails that contain no information and no details, we really can’t do anything with them.  We have to prioritize our time to work with people who provide us enough information where we can look into the order details, user accounts, coupon code settings, etc.  It sometimes requires a little bit of “detective work” to figure things out.  We cross-reference orders, to people, to voucher codes, to email addresses, etc.  Sometimes we find it’s a spelling error in the name or the email address.  Sometimes we find that someone mixed up their voucher code, or perhaps used a letter “O” instead of the number “0”.  Sometimes we find that accounts were co-mingled due to not following instructions, and we need the details to sort it out.  So, in advance, we’re asking you to “Help us help you.”  Give us something to work with.  We need details.

Use the online forms or send an email to Support@APNGA.com, and we will get to your specific issue as soon as possible. Most issues require a bit of research to cross-reference order numbers, usernames, email addresses, and voucher code numbers, etc… so putting people “on hold” while we dig into the details is not a good use of anyone’s time.

We do not offer telephone tech support.  Why?  Because it slows down the “detective work” process in getting your issue resolved.  And while we’re on the phone with one customer, other customers end up leaving voicemail messages like the “Bad Examples” above, without providing details, and they often don’t leave their email address or spell their names, so we aren’t able to provide good service to them.  There are a lot of reasons.  Just realize, we want to resolve every tech support issue as quickly and efficiently as possible.  With our email support system, our average time to resolve an technical support issue is between 4-6 minutes, compared to 10-15 minute phone calls that keep you waiting on-hold.

We typically answer every support email within 4 to 6 hours.  Almost every support ticket is resolved same-day.  With over 135,000 past and present customer accounts to keep up with, we’d like to think same-day resolution is a decent track record.

Certificate: I need a copy of my course certificate (for yourself, your RSO, etc.)2026-08-10T14:50:10-07:00

When you complete a course on APNGA, your course completion certificate is downloadable from the website.

Log into your APNGA account. Look beside your courses. Find your certificate and click on it. Then download it or email it from the browser.

APNGA only stores certificates for CURRENT course enrollment periods. To obtain a copy of your certificate for a class you took in a previous period, you will need to see your RSO. RSOs are required to retain certificates for their operators, inspectors, employees, etc.

AGAIN: Upon completing a course, it is imperative that you download and print your certificate immediately.  Provide a copy to your RSO and retain a copy for your own personal records.  After your course period has expired (6 months), your course progress, course data, test data, and certificate will no longer be accessible.  APNGA is NOT responsible for retaining copies of your certificates. 

If you need a copy of your certificate once it has been removed from our system, you will need to obtain it from your RSO or retake the course and recertify to obtain a new certificate.

Course Progress: I can’t get to the test. The “Mark Complete” button isn’t clickable.2026-08-10T14:50:29-07:00

Check your browser.  Be sure you are NOT using Internet Explorer.  Internet Explorer is not compatible.

1. Try using Chrome, FireFox, Edge, or Safari.

2. If that doesn’t work, clear the cookies and cache of your browser to ensure you are working with clean data.

3. If that doesn’t work, try a different computer, or a different device (tablet, iPad, smartphone) to ensure that it is not a browser or network settings issue.

The course video has no sound. How do I turn it up?2026-08-10T14:50:45-07:00

The course videos have a volume control on their control panel.

To adjust the course volume on the video, hover your mouse over the video and the volume control is to the right of the course progress bar.

Also be sure to check your computer’s volume control to ensure it is turned up, so you can hear the course video.

My credit card declined when I tried to make a purchase. Why?2026-08-10T14:51:23-07:00

Often times payments get declined because the transaction is for a good or service that is not typical for your account. Payments get coded for each business type by merchant account processors. In the case of our courses, the transaction would be coded as an online software or online education service, which your bank might interpret as potential fraud because it is 1) not the typical type of purchase you make, and 2) it is an online transaction without the card being physically present to swipe or insert into a card chip reader.

Other reasons could be that the name on the transaction does not match the name on the card.

Of course, the other reasons for a credit card decline are much more typical.

* The card number could be wrong.
* The card could be expired.
* The CVV code might have been entered incorrectly.
* The card might be maxed out.
* If it’s a debit card, funds may not be available.
* The card could have been reported lost or stolen.
* Etc.

IMPORTANT:  If you attempt to make a purchase and your card declines more than 3 times, please email Support@APNGA.com and inform us of the issue.  If you continue to attempt to make the transaction and your card continues to decline, our system may flag your IP address as a security threat, and your IP address can get banned.  So, email us rather than continue trying to make your purchase.

How long are each of the courses? How much time do they take?2026-08-10T14:52:10-07:00

When you enroll in an APNGA course, the course enrollment remains valid for 6 months.  Once a course expires, you will need to re-enroll to take the course. 

Here is the duration of each of the five APNGA courses.

  • Gauge Safety Course (with USDOT Hazmat Refresher): Total time: 4 to 6+ hours, comprised of 3+ hours video lessons, plus a 30-question practice test and 30-question certification test and RSO instruction.
  • HAZMAT Refresher Course: 53 minutes, plus a 10-question test.
  • Annual Employee Refresher Course: 1 hour, 45 minutes plus a 10-question test.
  • Radiation Safety Officer (RSO) Course: Total: 6 to 8+ hours.  Training Manual portion 4+ hours, Video portion: 4 hours, 8 minutes.
  • Do-It-Yourself (DIY) Annual Audit Course: 41 minutes.
How long will my course enrollment last before it expires?2026-08-10T14:52:44-07:00

When you enroll in an APNGA course, your enrollment will remain valid for six (6) months.  You will need to complete your course progress and earn your certificate within the 6-month period.

If you have not completed your course within six (6) months of enrolling, your course will expire, and all course progress will be deleted.  You will need to purchase a new enrollment to take the course.

Upon completing a course, it is imperative that you download and print your certificate immediately.  Provide a copy to your RSO and retain a copy for your own personal records.  After your course period has expired (6 months), your course progress, course data, test data, and certificate will no longer be accessible.  APNGA is NOT responsible for retaining copies of your certificate. 

If you need a copy of your certificate once it has been removed from our system, you will need to obtain it from your RSO or retake the course and recertify to obtain a new certificate.

Verify an APNGA Certificate:

Enter an APNGA Certificate Number into the field below and click the “Verify Certificate” button.  If we have a record of the user’s certificate in our current database, the status and user details will be displayed.

Help me find my certificate number

NOTE: This is a quick-reference tool.  “Valid” or “Invalid” is solid confirmation of certificate status.
If you receive ANY OTHER STATUS, contact APNGA for final determination of the certificate’s validity.

Contact Information:

Location:

P.O. Box 475
Pearce, AZ  85625

Email:

Support@APNGA.com

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Contact Form:

Provide DETAILS about what you need.
Please do NOT submit a blank message or a course title and assume that we know what you need.
Be specific. We cannot respond to blank messages or course titles in the message without specific details for your request.

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