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Have a question, need a quote, or looking for support? Reach out—we’re here to help.
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Contact Us
Call to Place an Order
Our sales and support staff are ready to assist. Contact customer service for any questions about the use of your Radiation Alert®
equipment.
Click here for calibration questions.
(931) 964-3561
Email Us
radiationinfo@seintl.com
Customer Service Hours
S. E. International, Inc Customer Service Dept. PO Box 39, 436 Farm Rd
Summertown, TN 38483, USA
Monday-Friday
8am to 4pm CT
Closed Saturday-Sunday
What Our
Clients Say
Ron Ulbrich, Geiger Counter Pro
“The Radiation Alert Ranger® is a great value for those looking for a modern Geiger counter. I found that is simple to use yet includes many advanced functions if and when you want them without obstructing the simplicity…”
Judson Kenoyer, CHP, CIH
“I have used the Monitor 4 in courses that I teach radiation safety for close to 8 years. The students love it and affectionately call it the “Batman unit” because of its use in the movie The Dark Knight Rises. It is light-weight, sensitive, and quite often out performs some of the more expensive units from other companies that we use in a lab exercise…”
Neil Breslow, NDT Supply
“NDT Supply has been working with SE International since we started business in 2000. We have found them to be easy to work with, and a very reliable and responsive supplier. Questions and issues are always handled promptly and with a smile…”
Michael, Patriots Antiques
“Your Ranger changed how I run my business. It’s accurate, easy to use, and perfect for detecting uranium glass.”
Christopher Ulriksen, CSP, M.S.
“Great product, even better support. Quick replies, solid calibration—SE International is my go-to.”
Gregory Field, USMC/ARNG Ret.
“We used SE monitors in Iraq and Afghanistan—sandstorms, snow, even camel licks couldn’t break them. Only mortar fire did. I’ve trusted them ever since.”
News & Updates
Surveying Antiques For Radiation
Posted on October 16, 2026
Instrument-Specific Operating Steps for Antique Surveys The Monitor 4 and Ranger can be used to quic
Read MoreAntique Collecting and Radiation: An Overlooked Connection
Posted on October 16, 2026
Antique Collecting and Radiation: An Overlooked Connection Antique collecting is a rew
Read MoreEnvironmental Monitoring Procedure Using the Radiation Alert® GammaView
Posted on October 16, 2026
Environmental Monitoring Procedure Using the Radiation Alert® GammaView The Radiation Alert® Gamma
Read MoreRadiation Wipe (Smear) Test Procedure Using The Radiation Alert Ranger®
Posted on October 16, 2026
Radiation Wipe (Smear) Test Procedure Using the Radiation Alert® Ranger with Wipe Test Plate Docume
Read MoreEnvironmental Monitoring Procedure Using the Radiation Alert® Area Monitor
Posted on October 16, 2026
Environmental Monitoring Procedure Using the Radiation Alert® Area Monitor The Radiation Alert® Ar
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The Crucial Role of Staff Training in Radiation Detection
Posted on October 24, 2025
In an era where technology plays a pivotal role in safeguarding our well-being, radiation detection
Read More