Pocket dosimeters are recommended for use by professionals who work with or around the radioactive materials. The PM1604A and PM1604B perform the following functions:

• Monitoring and measurement of the ambient dose equivalent and ambient dose equivalent rate across wide energy range: from the natural background level up to 5-10 Sv/h (500-1000 R/h);
• Alerting the user through 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.

To protect users from overexposure, the dosimeters have two alarm thresholds. If the preset dose and dose rate thresholds are exceeded, the dosimeter immediately alerts the user of the danger of irradiation through an audible alarm.

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.

If the dosimeter is contaminated with radioactive dust, it can be easily cleaned with radiation decontamination solutions.

Standards compliance

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

PM1604A	PM1604B
Detector	GM tube	GM tube
DER Measurement Range	1 μSv/h – 5.0 Sv/h	1 μSv/h – 10.0 Sv/h
Dose Rate Accuracy	± (15 + 0.02/H + 0.003H) %  where H – dose rate, mSv/h (in range 1 μSv/h - 5.0 Sv/h)	± (15 + 0.02/H + 0.002H) % where H – dose rate, mSv/h (in range 1 μSv/h - 10.0 Sv/h)
DE Measurement Range	0.01 μSv - 9.99 Sv (1 mR - 999 R)	0.01 μSv - 9.99 Sv (1 mR - 999 R)
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))
Energy range	0.048 - 6 MeV	0.048 - 6 MeV
Energy response relative to 0.662 MeV  (137Cs)	± 30% (in range 0.048 MeV - 3 MeV);  ± 50% (in range 3.0 MeV - 6 MeV)	± 30% (in range 0.048 MeV - 3 MeV); ± 50% (in range 3.0 MeV - 6MeV)
Survive after momentary influence of maximum permissible gamma radiation within 5 min:	50 Sv/h (5000 R/h)	100 Sv/h (10000 R/h)
Ingress protection rating
Drop test	1.5 m (4.9 ft)	1.5 m (4.9 ft)
Water resistant
Data channel
Alarm type	audio	audio
Additional
Countdown timer	yes	yes
Display of time to critical exposure
Functions	minutes, hours, day of the week, date, month, year	minutes, hours, day of the week, date, month, year
Calendar mode	alarm clock, timer, stop watch	alarm clock, timer, stop watch
PC Communication	IRDA	IRDA
Power
Batteries	one CR 2032 lithium battery	one CR 2032 lithium battery
Battery discharge control	Pictogram on LCD	Pictogram on LCD
Battery lifetime (average DER not more than 0.3 µSv/h, alarms activated for not more than 20 s/24 hours)	9 months *using LCD backlight not more than 5 s/day	9 months *using LCD backlight not more than 5 s/day
Physical Parameters
Dimensions	50 x 90 x 19 mm - with a clip (2'' x 3½'' x ¾'')	50 x 90 x 19 mm with a clip (2'' x 3½'' x ¾'')
Weight	85 g (3 oz)	85 g (3 oz)
Environmental Characteristics
Temperature	-20 up to +70 °C (from -4 up to +158 °F)	-20 up to +70 °C (from -4 up to +158 °F)
Humidity	up to 98% at 35°C (95°F)	up to 98% at 35°C (95°F)