|
Detector |
Halogen-quenched, uncompensated Geiger-Mueller tube with thin mica
window |
|
Window Size |
1.4 to 2.0 mg/cm2 thick; diameter is 45 mm (1.75”) |
| Sensitivity |
Detects alpha down to 2.5 MeV;
efficiency at 3.6 MeV > 80% |
|
Detects beta at 50 keV w/35%
efficiency, at 150 keV w/75% |
|
|
Detects gamma and X rays down to 10 keV thru window, 40 keV minimum
through case; gamma sensitivity is 3,500 CPM/mR/hr |
|
Accuracy |
15% of full scale, referenced to Cs-137 |
|
Operating Ranges |
.001 to 100 mR/hr, .01 to 1000 µSv/hr, and 0 to 300,000 CPM |
| Display |
4-digit liquid crystal display with mode indicators; updates every 3
seconds |
|
Calibration |
At factory to NBS standard Cesium 137 gamma source |
|
Anti-Saturation |
Holds full scale in fields as high as 100X max. reading |
|
Power Required |
One 9-volt alkaline battery (included in price of the unit) |
|
Battery Life |
Up to 200 hours use at 1 mR/hr |
|
Temperature Rng |
-10° to + 50° C (14° to + 122° F) |
|
Weight |
178 grams (9 to 10 oz.) without battery |
|
Size |
150 x 80 x 30 mm (5.9 x 3.2 x 1.2 in.) |
|
Indicators |
LED indicator, internally mounted audible beeper for count rate, can be
switched off for silent operation |
| Input Port |
Calibrate port on side for
electronic calibration w/pulse generator |
| Output Port |
Dual miniature jack on side to
drive a CMOS or TTL interface to record counts on computer, data logger,
or accumulating counter |
| Audio Port |
The Data Port can alternatively be
used as an Audio Port, using an earphone with a 3.5mm stereo plug |
| Warranty |
1 year on instrument, 90 days on GM
tube, includes CE mark |
|
Country of Make |
USA |
