---
product_id: 5289411
title: "SEI Inspector Extreme USB Handheld Digital Radiation Detector with LCD Display and Protective Boot"
brand: "radiation alert"
price: "VT4240"
currency: VUV
in_stock: false
reviews_count: 7
url: https://www.desertcart.vu/products/5289411-sei-inspector-extreme-usb-handheld-digital-radiation-detector-with-lcd
store_origin: VU
region: Vanuatu
---

# 2000 hrs battery life Onboard memory & USB data export Rugged protective boot SEI Inspector Extreme USB Handheld Digital Radiation Detector with LCD Display and Protective Boot

**Brand:** radiation alert
**Price:** VT4240
**Availability:** ❌ Out of Stock

## Summary

> 🕵️‍♂️ Stay ahead of radiation risks with precision and power in your palm!

## Quick Answers

- **What is this?** SEI Inspector Extreme USB Handheld Digital Radiation Detector with LCD Display and Protective Boot by radiation alert
- **How much does it cost?** VT4240 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/5289411-sei-inspector-extreme-usb-handheld-digital-radiation-detector-with-lcd)

## Best For

- radiation alert enthusiasts

## Why This Product

- Trusted radiation alert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Data-Driven Safety:** Onboard memory plus free USB software for seamless data download & alerts
- • **User-Centric Display:** Backlit LCD with multiple units (CPM, CPS, µSv/hr, mR/hr) for clear readings anytime
- • **Endurance in the Field:** Lightweight design with 2000-hour battery life for extended use
- • **Built for Tough Environments:** Rugged protective boot ensures durability in harsh field conditions
- • **Precision Radiation Tracking:** Detects alpha, beta, gamma & x-rays with ultra-sensitive GM tube

## Overview

The SEI Inspector Extreme USB is a handheld digital radiation detector designed for professionals needing precise, real-time radiation monitoring. Featuring a sensitive GM tube, onboard memory, and free USB software, it offers versatile data management and alert settings. Its rugged build and 2000-hour battery life make it ideal for demanding fieldwork, delivering reliable detection of alpha, beta, gamma, and x-rays with multiple display modes for user convenience.

## Description

S.E. International Radiation Alert Inspector Xtreme USB is handheld digital radiation alert detector. It has built in efficiencies for common isotopes to calculate activity in Bequerels and DPM. It is optimized to detect small changes (low levels) in radiation levels and to have high sensitivity to many common radionuclides. The new back lit display shows readings in your choice of counts per minute (CPM), counts per second (CPS) uSv/hr, mR/hr, or in accumulated counts. The SEI Inspector Xtreme USB counts ionizing radiation changes, and the unit of measurement is selected and displayed using the mode switch. The display shows various indicators, based on the mode setting, the function performed, and remaining battery power. These include low battery, alert, timer, total mode calibration mode, utility menu (timer, calibration, alarm set mode), and units of measurement. Reading ranges: 0.001 (1&muR) to 100.00 mR/hr, or 0 to 350,000 CPM, or 0.01 to 1000 µSv/hr, 0 to 5,000 CPS, total counts 9,999,000 µSv/hr. Calibration: Calibrated electronically using the free Observer USB software. Accuracy: MR/hr + or - 10 percent (NIST), + or -15 percent maximum 0 to 100, µSv/hr + or - 10 percent (NIST), + or - 15 percent maximum 0.01 to 1000, CPM + or - 10 percent (NIST), + or -15 percent maximum 0 to 350000 (referenced to CS137). It has a factory default calibration reset option that will automatically reset to auto averaging, mR/hr, CPM, and CAL (calibration) 100. Energy sensitivity: 3340 CPM/mR/hr, referenced to Cesium (Cs) 137. Energy sensitivity detects alpha down to 2.0 MeV. It detects beta at 0.16 MeV with typical 25 percent detection efficiency at 1 MeV. It detects gamma down to 10 keV through the end window. Detection: Smallest detectable level for I-125 is 0.02 µCi at contact. It detects gamma and x-rays down to 10 keV typical through the window, and 40 keV minimum through the sidewall. GM tube: A halogen-quenched, uncompensated GM tube with an effective diameter of 1.75-inches. The detector is powered by a 9-volt alkaline battery (not included).

## Features

- Radiation detector offers maximum performance in a lightweight, rugged solution for using your survey meteres in the field, is designed specifically for individuals operating in tough environments
- On board memory to collect accumulated counts; meter will hold at full-scale in fields as high as 100 times the maximum reading for anti-saturation; normal background radiation: approx 10 to 20 CPM
- Free Observer USB Software that allows you to download your data from the internal memory, set computer alarms, and calibrate your instrument; alert set range: 0 to 50 mR/hr and 1 to 160000
- Thin wall GM tube provides excellent sensitivity to low levels of alpha, beta, gamma, and x-rays; output: dual miniature jack drives CMOS or TTL devices and counts to computer or datalogger
- USB for use with observer USB software for PCs battery: one 9-volt alkaline battery; battery life is approx. 2000 hours at normal background radiation levels; window thickness: 1.4 to 2 mg/sq cm

## Images

![SEI Inspector Extreme USB Handheld Digital Radiation Detector with LCD Display and Protective Boot - Image 1](https://m.media-amazon.com/images/I/616OKvn05aL.jpg)
![SEI Inspector Extreme USB Handheld Digital Radiation Detector with LCD Display and Protective Boot - Image 2](https://m.media-amazon.com/images/I/71RaSGv4D5L.jpg)

## Customer Reviews

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    Will only last 9 years.
  

*by A***A on Reviewed in the United States on July 3, 2023*

Unit worked for 9 years as an on the shelf monitor.Not exposed to any drops, stress, etc.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great expectations met!
  

*by P***R on Reviewed in the United States on February 6, 2014*

Shipped on time and came as advertised. This was a gift for a family member, and it turned out great! the fact that it has built in isotopes was a major buying factor since spectrum analyzers are required with most models. Depending on whether or not you know what your doing the presets are a huge plus with this model.  Even if your a novice this piece will work for you and will continue to work as you learn how to use it and become seasoned. This is one of the only products that comes with software to analyze your results as well as technical support and  free calibration after a period of time. This comes in handy if you use it on a regular basis or occasionally.  The factory warranty grants a free calibration for the first time but factory specs are more than good. This is a perfect product for the avid user or anyone who is weary of a changing ecosystem. Don't be fooled! This is the real deal. Fukushima has had a huge impact on the environment and will continue to do so.  This is a must for anyone wanting high quality for a reasonable price.  No matter what, if you like it or not, we are all going to have to deal with radiation in the years to come. It would behoove you to have something like this in preparation for the future: it is inevitable!

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Very good, accuracy was spot on for alpha - Beta
  

*by D***V on Reviewed in the United States on July 8, 2014*

Very good, accuracy was spot on for alpha - Beta, and Gamma test samples.  It did not come with a manual, but you can download it off their site, and they have a few short video's that take you through the mode changes and functions. Data logging is simple to use. The case feels a little fragile so the protective case is a must.

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-25*