Polimaster Innovating radiation detection technologies since 1992

X-ray and Gamma Radiation Personal Dosimeter РМ1621MA

PM1621 series dosimeters are professional energy-compensated instruments, which designed to monitor and measure dose equivalent and dose equivalent rate from both gamma and X-ray radiation. Instruments are highly sensitive and register the slightest changes in the natural background radiation. Hermetic and shockproof case and fluorescent backlight on LCD screen allow operation in the harsh and unfavorable environments. PM1621MA modification has searching algorithm for detection and localization of radioactive materials, extended DER measurement range and  integrated vibro and light alarm.

Instruments of PM1621 series are recommended to use by Law Enforcement and Security agencies, scientists, medical and other professionals, exposed to gamma and X-ray radiation.

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Operation Principle

Instruments measure gamma and X-ray dose and dose rate at a wide energy range up to 1 Sv/h, alert user via an audible alarm when the preset dose or dose rate thresholds are exceeded. When the radiation intensity exceeds the upper limit of dose rate measurement, the warning sign “OL” (on LCD) and interrupted audible signal appear. Instruments record and store  up to 1000 events (500 DER + 500 DE) in its non-volatile memory, transmit all recorded data via an infrared channel to PC for further processing and analysis.

Instruments can be used independently or as a part of unique operational dosimetry system for everyday and emergency radiation control, tailored to the specific needs of customers.

Modifications available

PM1621 - basic model

PM1621A - has extended DER measurement range

PM1621M - has search mode and integrated vibro and light alarm

PM1621MA - has extended DER measurement range, search mode and integrated vibro and light alarm



  • Illicit Trafficking of Nuclear and Radioactive Materials
  • Personnel Exposure
  • Emergency Response
  • Guest dosimeters
  • Personnel Exposure
  • Radiation Safety in NDT

Standards Compliance

Designed to meet ANSI N42.20 - 2006 and IEC 61526: 2010 requirements


Detector Geiger-Muller tube
Dose equivalent rate (DER) measurement range 0.1 μSv/h – 1.00 Sv/h
DER measurement accuracy ±(10+0.0015/Ḣ +0.01Ḣ)%, where Ḣ - dose rate in mSv/h
Dose equivalent (DE) measurement range 0.01 μSv - 9.99 Sv
DE measurement accuracy ±10 % (in range 1 μSv - 9.99 Sv (100 μR - 999 R))
Energy range 10.0 KeV - 20.0 MeV
Energy response relative to 0.662 MeV:
for 137Cs ±30%
Search mode available
Ingress protection IP67
Drop test on concrete floor 0.7 m (2.4 ft)
Alarm Type visual, audio, vibration
PC communication IRDA
Power supply one AA type battery 1.5V (+ 0.1; minus 0.4)
Battery lifetime:
DER not more than 0.3 µSv/h, alarms activated for not more than 20 s/24 hours 12 months (at a t from 0 up to 60°С)
Operating temperature - 40 up to +60 °С (from -40 up to +140 °F)
LCD indication - 40 up to +60 °С
Humidity up to 98% at 95°F (35°C)
Atmospheric pressure from 84 up to 106,7 kPa
Dimensions no more than 87х72х39 mm
Weight 0.185 kg
Mean service lifetime no less than 10 years
Mean recovery time no more than 60 min

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