The Inspector is a small handheld
microprocessor based instrument which offers
excellent sensitivity to low levels of alpha, beta,
gamma, x-rays. The digital readout is displayed
with a red count light and audible beep,
providing instant indications of the radiation
level. Other benefits include an adjustable timer
and external calibration controls.
Specifications
- Detector: Halogen-quenched uncompensated GM tube
with thin mica window, 1.4-2.0 mg/cm2 areal density.
Effective diameter of window is 45 mm (1.75 in.).
- Display: 4 digit liquid crystal display with indicators
- Averaging Periods: Display will update every 3 seconds.
At low background levels, the update is the moving
average for the past 30 second time period. Timed
period for moving average decreases as the radiation
level increases.
- Operating Range: mR/hr- .001 (1ěR) to 100 mR/hr;
ěSv/hr- .01 to 1000; CPM- 0 to 300,000; CPS- 0 to
5000; Total/Timer- 1 to 9,999,000 counts
- Accuracy: mR/hr + 15% from 0 to 50 mR/hr; mR/hr +
20% from 50 to 100 mR/hr; CPM + 15% from 0 to
130,000 CPM; CPM + 20% from 130,000 to 300,000
CPM; (Referenced to Cs-137)
- Sensitivity to Common Isotopes: Typical GM tube
efficiency for 4 Pi geometry at contact
- Gamma Sensitivity: 3500 CPM/mR/hr referenced to Cs-
137; Smallest detectable level for 1-125 is .02 ěCi at
contact
- Timer: Can set 1 minute sampling periods from 1 to 10
minutes. 10 minute sampling periods 10 to 60 minutes;
1 hour sampling periods from 1 to 24 hours
- Count Light: Red LED flashed with each radiation event
- Size: 150 x 80 x 30 mm (5.9" x 3.2" x 1.2")
- Weight: 225 grams (8 oz) including 1 nine volt battery
Beta Isotopes
|
Energy
|
Efficiency
|
C-14
|
49 keV Avg. 156 keV
|
5.3%
|
Bi-210
|
390 keV Avg. 1.2 MeV max.
|
32%
|
Sr(Y)-90
|
546 keV and 2.3 MeV
|
38%
|
P-32
|
693 keV Avg. 1.7 MeV max
|
33%
|
Alpha
|
|
|
AM-241
|
5.5 MeV
|
18%
|
|

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