Radiation Monitor RADEX RD1503

RADEX RD1503 - Radiation Detector was developed for basic verification of radiation contamination of air, materials and objects.

This device is rugged, inexpensive, and has few options to eliminate confusion.

RADEX RD1503 contains one low-voltage SBM20-1 type Geiger-Muller counter of Beta- and Gamma- radiation. 

Technical Specifications

Scale range ambient radiation µSv/h 0.05 ... 9.99
Scale range exposure dose-rate µRem/h 5 ... 999
Scale range of detectable energies MeV 0.1 ... 1.25
Reproducibility of indications (at P=0.95), where Ð is a dose rate in µSv/h % 15+6/Ð
Audio alarm threshold levels µSv/h 0.30, 0.60, 1.20
µRem/h 30, 60, 120
Measurement Cycle sec 40±0.5*
Measurement - continuous
Batteries ("AAA") pcs 2
Time of continuous operation, not less hour 550 **
Overall dimensions mm 105x60x26
Weight (without batteries) g 90

*   Increased number of measurement cycles leads to greater reliability of measured results. 

** Two batteries with a capacity 1350mAh, with ambient radiation not to exceed 0.3 µSv/h and with factory settings.

RADEX RD1503 Radiation Detector 
(Geiger Counter)


Latest Radiation Map


Which Geiger Counter is best for me?


How much is harmful?


How dangerous to human health is radiation from the crippled nuclear power plant in Japan?

How does it compare with other nuclear accidents and our everyday radiation exposure?

Not all radiation is the same, so scientists use the ‘sievert’ to measure the health risks of radiation.

SAFE Radiation Dose: 0.09 microsieverts
Exposure: One year living within 50 miles of a nuclear power plant 


Find out more...