RADIATION ALERT® instruments, Hand-Held, Dosimeter, Multi Channel Analyzer





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Since 1979 RADIATION ALERT® instruments have proven ideal for a wide range of applications. As the manufacturer of our products, we have engineered them to be reliable, simple to use and understand, and affordably priced. We're dedicated to our customers and promise to help you find the appropriate instrument for your needs. Our continuing development reflects our commitment to meet the ever-increasing and changing needs of first response, industrial, governmental, educational, medical, and environmental markets.

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Hand-Held Instruments

Area Monitor


Portable Rad Lab and MCA


Hand-Held Instruments 

 SEI RADIATION ALERT Ranger Digital Survey Meter





The new Ranger offers maximum performance in a lightweight, rugged solution for using your survey meter at the facility, or in the field. Though designed for industrial environments, the Ranger has all the features you’ve come to expect in the lab. The Ranger is a small, handheld, microprocessor-based instrument which offers excellent sensitivity to low levels of alpha, beta, gamma and x-rays.


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SEI RADIATION ALERT Ranger EXP Digital Survey Meter

Ranger EXP




The new Ranger EXP offers maximum performance in a lightweight, rugged solution for using your survey meter in the field. The Ranger EXP has been designed specifically for individuals that are operating in harsh environments. The Ranger is a small, handheld instrument that offers excellent sensitivity to low levels of alpha, beta, gamma and x-ray.


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SEI RADIATION ALERT Monitor 200 Digital Survey Meter

Monitor 200




The new 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. It has a digital display, a red count light, and a beeper that sounds with each count detected. Other features include an adjustable timer, and selectable alert.


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SE RADIATION ALERT Monitor 1000EC Digital Survey Meter

Monitor 1000EC



The Monitor 1000EC measures gamma, and x-rays. Perfect for most applications requiring an energy compensated detector. Users can choose from readings of CPM, CPS, μSv/hr, mR/hr, or in accumulated counts. It has a red count light, a beeper that sounds with each count detected, and includes an adjustable timer, and selectable alert.


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Radiation Frisker Handheld Radiation Contamination Monitor

Radiation Frisker



The Radiation Frisker is a radiation contamination instrument that has been designed and developed to meet the ever increasing demands of integrating the latest electronics with a proven and dependable GM (Geiger-Mueller) detector, the result is an ergonomic and ruggedized tool that addresses a diverse range of radiological applications. The Radiation Frisker is an instrument that is truly operable with one hand tied behind your back!


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Monitor 4 & 4EC



The MONITOR 4 and MONITOR 4EC are compact, general purpose survey meters capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. A red count light flashes and a beep sounds with each event detected. The Monitor 4EC offers a more accurate linear reading for gamma and x-rays (above 40 keV).


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RAP Probes



AP47, RAP200, and RAP640 Scintillation Probes

The CsI (Tl) crystal used in Radiation Alert® Probes has a higher atomic number, is more rugged, and less hygroscopic than a typical Nal detector. The improved gamma ray absorption allows a thinner crystal to be used, effectively reducing the background count rate. (For use with Gateman only).

  • RAP47: Optimized for high sensitivity to low energy gamma radiation. It is ideal for the 47 keV, the typical energy of lead 210 and 35 keV, the typical energy of Iodine-125.

  • RAP200: Optimized for 185 keV, the typical energy of U-235.

  • NEW RAP640: Optimized for high energy gamma.

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Replacement Probe




The CDV-700RP probe is specifically designed to have greater sensitivity and easily replace the existing beta/gamma probe on the CDV-700 survey meter. No modification is required! The grip on the probe is adjustable to allow for the perfect fit to Victoreen or Lionel meters. Just unplug the existing probe and plug in the CDV-700RP. (For use with CDV-700 meters only).


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Area Monitor 

Radiation Alert Area Monitor

Radiation Alert

Area Monitor

 The Radiation Alert Radiation Area Monitor uses state of the art touch screen technology and a stream lined design to create one of the most user friendly area monitors available. The user interface is an intelligent graphics display system featuring an integrated resistive touch screen, an easy to read five digit LED display, warning indicators for low and high radiation alarm levels, low battery, and instrument failure.


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The Radiation Alert® Sentry Personal Alarming Dosimeter and Rate Meter is designed to ensure the personal safety of personnel that work in occupations with potential x-ray or gamma exposure. The pocket sized unit has built in memory for recording data points for the purpose of tracking exposure. The Sentry Software option enables you to generate incident reconstruction for analysis. The software also enables you to easily set the vibrating and audio alert to your desired levels for dose and dose rate. Use the audio switch to choose between an audible click with every count taken, or a discreet silent mode that can be augmented with the use of headphones.


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GammaPAL and Multi Channel Analyzer 




The Gamma PAL is a complete portable measuring system for analyzing radiation contamination in food, such as milk, meat, fish, grain, fruit, and vegetables, as well as soil, water, air and other materials. It allows users to directly and easily perform quick, reliable measurements in Bq/l or Bq/kg and identify the isotopes present in potentially contaminated material using one of three pre-calibrated geometries.


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The Universal Radiation Spectrum Analyzer (URSA-II) has everything you would expect in a full-featured MCA program and can be used with practically any radiation detector; NaI (TI), ZnS, gas proportional, plastic scintillation, neutron, CdZnTe (URSA-SC only), even GM. There's no need to buy a special detector! Just use the ones you already own. URSA will extract any data your detector can supply!


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