X-ray and Gamma Radiation Personal Dosimeter РМ1621
PM1621 series dosimeters are professional energy-compensated instruments, 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.
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.
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 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
Detector | Geiger-Muller tube |
Dose equivalent (DE) measurement range | 1.0 μSv - 9.99 Sv |
Dose equivalent rate (DER) measurement ran-ge | 0.1 μSv/h – 100 mSv/h |
DE measurement accuracy | ±15 % (in range 1 μSv - 9.99 Sv (100 μR - 999 R)) |
DER measurement accuracy | ±(15+0.0015/Ḣ +0.01Ḣ)%, where Ḣ - dose rate in mSv/h |
Search mode | no |
Energy range | 10.0 KeV - 20.0 MeV |
Energy response relative to 0.662 MeV | for 137Cs±30% |
Alarm Type | audio |
Drop test on concrete floor | 0.7 m (2.4 ft) |
Ingress protection | IP67 |
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 hours12 months (at a t from 0 up to 60°С) |
Weight | 0.150 kg |
PC communication | IRDA |
Operating temperature | - 40 up to +60 °С (from -40 up to +140 °F) |
Atmospheric pressure | from 84 up to 106,7 kPa |
Dimensions | no more than 87х72х39 mm |
Humidity | up to 98% at 95°F (35°C) |
Mean service lifetime | no less than 10 years |
LCD indication | - 40 up to +60 °С |
Maximum permissible gamma radiation influen-ce within 5 min | 1 Sv/h (100 R/h) |
Mean recovery time | no more than 60 min |