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X-ray and Gamma Radiation Personal Dosimeter РМ1621/A/M/MA

Unique electronic personal radiation dosimeters for measurement of the exposure levels from X-ray and gamma radiation sources and recording even the minor fluctuations of the natural radiation background.
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Personal dosimeters PM1621/PM1621A

Polimaster's PM1621 and PM1621A Personal X-ray and Gamma Radiation Dosimeters are professional energy-compensated instruments. These dosimeters monitor and measure the personal dose equivalent Hp(10) and personal dose equivalent rate Hp(10) from both gamma and X-ray radiation. Their ability to compensate for the energy variations in the range from 10 keV upto 20MeV allows these personal dosimeters to make extremely accurate measurements.

The dosimeters' unique characteristics allow users to monitor personal irradiation levels from photon radiation sources, preventing overexposure. The instruments are highly sensitive and can register even the slightest changes in the natural background radiation.

Recommended for the protection of the professionals who work with or around radioactive materials from accidental and unknown radiation exposure, the PM1621 and PM1621A instruments perform the following functions:

  • Monitoring and measuring the gamma and X-ray dose and dose rate across a wide energy range up to 1 Sv/h (100 R/h);
  • Alerting the user via an audible alarm when the preset dose and/or dose rate thresholds are exceeded;
  • Recording and storing data for up to 1000 events (500 DER + 500 DE) in their non-volatile memory;
  • Transmitting all recorded data via an infrared channel to a PC for further processing and analysis.


In order to protect the user from overexposure, the dosimeters have two alarm thresholds. If either one of the preset dose or dose rate threshold value is exceeded, the dosimeter immediately alerts the user of the danger via loud, audible alarm. In cases when the radiation intensity exceeds the upper limit of dose rate measurement the LCDs of the dosimeters show the warning sign “OL” followed by the interrupted audible signal.

The instrument's hermetic and shockproof case and the fluorescent backlight on LCD screen allow for easy operation and precision even in the most harsh and unfavorable environments or weather conditions.

Personal dosimeters PM1621M/PM1621MA

In addition to the functions of the PM1621/PM1621A precursor models, the PM1621M/PM1621MA models offer an additional build-in vibration alarm and utilize Polimaster proprietary advanced search algorithm for detection and location of radioactive materials. The instruments are unique hybrids of an electronic dosimeter (ED) and a GM-based personal radiation detector (PRD). The PM1621M/MA are ideal low cost solutions for the law enforcement agencies and first responders as the instruments allow users to focus on the urgent and immediate tasks while the detectors continuously monitor the radiation levels.

Standards compliance

Designed to meet ANSI N42.20 - 2006 and IEC 61526: 2010 requirements , IP67 (IEC 60529)

 

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PM1621PM1621APM1621MPM1621MA
Detector
GM tubeGM tubeGM tubeGM tube
DER Measurement Range
0.1 μSv/h – 100 mSv/h0.1 μSv/h – 1.00 Sv/h0.1 μSv/h – 100 mSv/h
0.1 μSv/h – 1.00 Sv/h
Dose Rate Accuracy
±(15+0.0015/H +0.01H)%
(in range 0.1 µSv/h - 0.1 Sv/h,
where H - dose rate in mSv/h)
±(15+0.0015/H +0.01H)%
(in range 0.1 µSv/h - 1 Sv/h,
where H - dose rate in mSv/h)
±(15 + 0,0015/H + 0.01H)%
(in range 0.1 µSv/h - 0.1 Sv/h,
where H- dose rate in mSv/h)
±(15+0.0015/H +0.01H)%
(in range 0.1 µSv/h - 1 Sv/h,
where H - dose rate in mSv/h)
DE Measurement Range
1.0 μSv - 9.99 Sv
1.0 μSv - 9.99 Sv
1.0 μSv - 9.99 Sv
1.0 μSv - 9.99 Sv
Dose Accuracy
± 15% (in range 1 μSv - 9.99 Sv
(100 μR - 999 R))
± 15% (in range 1 μSv - 9.99 Sv
(100 μR - 999 R))
± 15% (in range 1 μSv - 9.99 Sv
(100 μR - 999 R))
± 15% (in range 1 μSv - 9.99 Sv
(100 μR - 999 R))
Energy range
10.0 KeV - 20.0 MeV10.0 Kev - 20.0 MeV10.0 KeV - 20.0 MeV10.0 KeV - 20.0 MeV
Energy response relative to 0.662 MeV
(137Cs)
±30%±30%±30%±30%
Survive after momentary influence of maximum
permissible gamma radiation within 5 min:

1 Sv/h
(100 R/h)
10 Sv/h
(1000 R/h)
1 Sv/h
(100 R/h)
10 Sv/h
(1000 R/h)
Ingress protection rating
IP67IP67IP67IP67
Drop test
0.7 m (2.4 ft)0.7 m (2.4 ft)0.7 m (2.4 ft)0.7 m (2.4 ft)
Water resistant
1 m ( up to 3.3 ft)1 m ( up to 3.3 ft)1 m ( up to 3.3 ft)1 m ( up to 3.3 ft)
Data channel
Alarm type
audioaudiovisual, audio, vibrationvisual, audio, vibration
Additional
Countdown timer
xxxx
Display of time to critical exposure
yesyesyesyes
Functions
xxxx
Calendar mode
xxxx
PC CommunicationIRDAIRDAIRDAIRDA
Power
Batteries
one AA batteryone AA batteryone AA batteryone AA battery
Battery discharge control
LCD indicationLCD indicationLCD indicationLCD indication
Battery lifetime (average DER not more than 0.3 µSv/h,
alarms activated for not more than 20 s/24 hours)
12 months

*using LCD backlight not more than 20 s/day
12 months

*using LCD backlight not more than 20 s/day
12 months

*using LCD backlight not more than 20 s/day
12 months

*using LCD backlight not more than 20 s/day
Physical Parameters
Dimensions
87 x 72 x 39 mm87 x 72 x 39 mm87 x 72 x 39 mm87 x 72 x 39 mm
(3 3/8'' x 2 7/8'' x 1 3/8'')
Weight
165 g165 g185 g185 g
Environmental Characteristics
Temperature
-40 up to +60 °С
(from -40 up to +140 °F)
-40 up to +60 °С
(from -40 up to +140 °F)
-40 up to +60 °С
(from -40 up to +140 °F)
-40 up to +60 °С
(from -40 up to +140 °F)
Humidity
up to 98% at 95°F (35°C)up to 98% at 95°F (35°C)up to 98% at 40°C (104°F) up to 98% at 40°C (104°F)