S. E. International, Inc.

S.E. International, Inc. designs, manufactures, and distributes radiation detectors under the Radiation Alert® brand. We engineer our instruments to be reliable, affordable, and intuitive. S.E.I. provides a diverse line of Geiger survey meters, radiation area monitors, radiation spectrum analyzers, software, and apps. Since 1979, we’ve helped protect the safety of people, facilities, and the environment with our line of nuclear radiation detectors.  Compact handhelds offer high sensitivity to multiple types of ionizing radiation detection including alpha, beta, gamma, and X-ray radiation.

At SEI, quality is a top priority and we ensure that our customers get the service and support they need.  Our staff is committed to innovation, our customers, and excellence in radiation detection.  We are dedicated to helping you find the appropriate instrument for your radiation detection needs.

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MONITOR 4 - Analog Radiation Detector

The Monitor 4 is compact, analog radiation detector.
$415.00 $399.99

MONITOR 4EC - Analog Radiation Detector

The Monitor 4EC is an energy compensated, ergonomic radiation survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges.
$445.00 $430.25

Monitor MC1K - Analog Radiation Detector

The new ergonomic MC1K is a handheld survey meter using a built-in energy compensated GM detector.
$435.00 $415.00

Radiation Alert MONITOR 200

The Monitor 200 measures alpha, beta, gamma, and x-rays. Its digital display shows readings in your choice of CPM, CPS, μSv/hr, mR/hr, or in accumulated counts.
$485.00 $470.00

Radiation Alert MONITOR 1000EC

The Monitor 1000EC is an energy compensated radiation detector that measures gamma, and x-rays. Perfect for most applications requiring an energy compensated detector.
$515.00 $499.99

THE FRISKER - Radiation Frisker

Sick of getting tripped up by cables? Want that free hand back? Tired of lugging around a meter the size of a lunch box? Presenting The Radiation Alert® Frisker.
$540.00 $524.99

Radiation Alert RANGER

The Ranger offers maximum performance in a lightweight, rugged nuclear radiation detector for surveying at the facility or in the field.
$595.00 $580.00

Radiation Alert WIPE TEST PLATE

The Radiation Alert® Wipe Test Plates are a swipe sample holder accessory for The Ranger radiation survey meters.

Radiation Alert Test SWIPES

Sample any surface contaminated with radioactivity with our test swipes.
$4.75 $4.50