Features
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 (1µR) to 100 mR/hr; µSv/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 µCi 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: 150×80 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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