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Nuclear Radiation Monitor “Medcom” Model Radalert 100X
[Radalert 100]

Radalert 100X™ Nuclear Radiation Monitor


The Radalert 100X™ measures alpha, beta, gamma, and X-radiation. Its digital display shows

readings in your choice of counts per minute (CPM) µSv/hr or mR/hr or in accumulated counts.

A red LED blinks and a beeper chirps with each count (the chirp can be muted). An audible

alert sounds when the radiation reaches a user-adjustable level.


§  Monitor personal radiation exposure

§  Monitor an area or perimeter

§  Detect radiation leaks and contamination

§  Ensure regulatory compliance

§  Monitor changes in background radiation

§  Demonstrate principles of nuclear physics

§  Check for radioactive minerals in the earth


Technical Specifications


Halogen-quenched Geiger-Mueller tube (LND 712)

Mica end window density 1.5-2.0 mg/cm²

Side wall is 0.012” #446 stainless steel

Detects Alpha, Beta, Gamma, and X-radiation


4-digit liquid crystal display with mode indicators

Operating Range:

µSv/hr:    .000-1,100

mR/hr:     .000-110

CPM:       0 to 350,000

CPS:        0 to 3,500

Total:       0 to 9,999,000 counts


Cesium -137 (gamma)

Gamma Sensitivity:

1,200 CPM/mR/hr referenced to Cs-137


+/-10% typical; +/-15% maximum

Alert Range:

User-adjustable alert level to 500 µSv/hr & 60,000 CPM

Count Light:

Red LED flashes with each count


Beeper chirps for each count (can be muted)


- Output: Stereo 3.5 mm jack sends counts to computers, data loggers,   

  other CMOS-compatible devices, earphones, and educational data  

  collection systems.

  0.9 V, 1 kOhm impedance.

- Input: 2.5 mm mono jack provides calibration input.

  0-3.3 V, >5 µs width, rising edge triggered.


Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range:

-20° to +50ºC, -4º to +122ºF


Can set sampling periods of 1 minute to 40 hours

Averaging Periods:

Display updates every 3 seconds, showing the average for the past

90-second time period at normal levels. The Averaging period decreases

as the radiation level increases.


One 9-volt alkaline battery; battery life 2,000 hours typical, 700 hours

minimum at normal background radiation levels at sea level. Battery life

decreases as radiation level rises.


150 x 80 x 30 mm (5.9” x 3.2” x 1.2”)


225 grams (8 oz) including battery


Computer software and cable available


CE Certified:

Emissions: EN 55011:2009 + A1:2010 (Class B emissions limits);

EN 61326-1: 2006 (Class B) RF Emissions


Immunity: EN 61326-1:2006 (Annex C) Portable Test and Measurement

Equipment; EN 61000-4-2: 1995 (ESD); EN 61000-4-3: 1997 (EM)

RoHS Compliant; Meets WEEE standards


This product was added to our catalog on Friday 09 October, 2020.
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Nanomachinery Co., Ltd.
4, Soi Petchkasem 100 ,Phetchkasem Rd. ,Bangkaenue ,Bangkae ,Bangkok, 10160, THAILAND.
Tel : 086-322-6876 ,02-421-9927 ,Fax : 02-809-2591 E-mail : pongthorn@nano-machinery.com
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