Unique electronic 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.
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:
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.
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.
| PM1621 | PM1621A | PM1621M | PM1621MA | |
|---|---|---|---|---|
| Detector | GM tube | GM tube | GM tube | GM tube |
| Dose Rate display | 0.01 μSv/h - 0.2 Sv/h (1 μR/h - 20 R/h), Hp(10) | 0.01 μSv/h - 2.0 Sv/h (1 μR/h - 200 R/h), Hp(10) | 0.01 μSv/h - 0.2 Sv/h (1 μR/h - 20 R/h), Hp(10) | 0.01 μSv/h -2.0 Sv/h (1 μR/h - 200 R/h), Hp(10) |
| Dose Rate Accuracy (H – dose rate, μSv/h) | ±(15+0.015/H +0.01H)% (in range 0.1 µSv/h - 0.1 Sv/h, where H- dose rate in mSv/h) | ±(15+0.015/H +0.01H)% (in range 0.1 µSv/h - 1 Sv/h, where H- dose rate in mSv/h) | ±(15+0.015/H +0.01H)% (in range 0.1 µSv/h - 0.1 Sv/h, where H- dose rate in mSv/h) | ±(15+0.015/H +0.01H)% (in range 0.1 µSv/h - 1 Sv/h, where H- dose rate in mSv/h) |
| Dose measurement | 0.01 μSv - 9.99 Sv (1 μR - 999 R) | 0.01 μSv - 9.99 Sv (1 μR - 999 R) | 0.01 μSv - 9.99 Sv (1 μR - 999 R) | 0.01 μSv - 9.99 Sv (1 μR - 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)) | ± 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 MeV | 10.0 Kev - 20.0 MeV | 10.0 KeV - 20.0 MeV | 10.0 KeV - 20.0 MeV |
| Energy response relative to 0.662 MeV (Cs-137) | ±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) |
| Standards compliance | meets most relevalnt parts of IEC 61526, and ANSI N42.20 | meets most relevalnt parts of IEC 61526, and ANSI N42.20 | meets most relevalnt parts of IEC 61526, and ANSI N42.20 | meets most relevalnt parts of IEC 61526, and ANSI N42.20 |
| Alarm type: | visual, audio | visual, audio | visual, audio, vibration | visual, audio, vibration |
| Physical Parameters | ||||
Dimensions | 87 x 72 x 35 mm (3 3/8'' x 2 7/8'' x 1 3/8'') | 87 x 72 x 35 mm (3 3/8'' x 2 7/8'' x 1 3/8'') | 87 x 72 x 35 mm (3 3/8'' x 2 7/8'' x 1 3/8'') | 87 x 72 x 35 mm (3 3/8'' x 2 7/8'' x 1 3/8'') |
Weight | 150 g (5.3 oz) | 150 g (5.3 oz) | 150 g (5.3 oz) | 150 g (5.3 oz) |
| 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) |
| Environmental protection | IP67 | IP67 | IP67 | IP67 |
| 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) |
| Power | ||||
| Batteries | one AA battery | one AA battery | one AA battery | one AA battery |
| Battery lifetime | 12 months | 12 months | 12 months | 12 months |
| Battery discharge control | LCD indication | LCD indication | LCD indication | LCD indication |
| Additional | ||||
| Countdown timer |  | | | |
| Display of time to critical exposure | yes | yes | yes | yes |
| Functions | | | | |
| Calendar mode | | | | |
| PC Communication | IRDA | IRDA | IRDA | IRDA |
