The Inspector is a small, handheld, microprocessor-based instrument which offers excellent sensitivity to low levels of alpha, beta, gamma, and x-rays. The digital readout is displayed with a red count light and a beeper sounds with each count detected. Other features include an adjustable timer and external calibration controls.

Specifications:

Detector: Inspector (Internal tube only):
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.).
Radiation symbol on front label marks the center of the detector.

Inspector EXP (External probe only)
RAP-RS1 Probe:
Same GM tube as Inspector. Anodized aluminum housing with coated, black foam grip.
500-volt power supply is in the probe head.
Size- Approx. length: 22.2 cm (8.75 in.) Diameter: 7 cm (2.75 in.)
Connector - Amphenol 31226 twinax connectors
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. The timed period for the 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%- 0 to 50
mR/hr +/- 20% 50 to 100
µSv/hr +/- 15% 01 – 500
µSv/hr +/- 20% 500 to 1000
CPM +/- 15% 0 to 130,000
CPM +/- 20% 130,000 to 300,000
(Referenced to Cs-137)

Sensitivity to Common Isotopes: Typical GM tube efficiency for 4 pi geometry at contact. 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%

Gamma Sensitivity:
3500 CPM/mR/hr referenced to Cs-137. Smallest detectable level for I-125 is .02 µCi at contact.
Timer:
Can set 1 minute sampling periods from 1 to 10 minutes. 10 minute sampling periods 10- 60 minutes. 1 hour sampling periods from 1 to 24 hours.
Count Light:
Red LED flashes with each radiation event.
Audio Indicator:
Internally mounted beeper (can be switched off for silent operation).
Outputs:
Dual miniature jack drives CMOS or TTL devices: count to computer or datalogger. Submini jack input allows for electronic calibration.
Anti-Saturation:
Meter will hold at full scale in fields as high as 100 times the maximum reading.
Power Requirements:
One 9-volt alkaline battery. Battery life is min. 200 hours at normal background radiation levels.
Temperature Range:
-10ºC to 50ºC (14ºF to 122ºF).
Weight:
Inspector: 301.4 grams (10.6 oz.) without battery. Inspector EXP: 420 grams (1 lb. 15.6 oz.) without battery.
Size:
150 x 80 x 30 mm (5.9 x 3.3 x 1.2 in.).
Utility Menu:
The Utility Menu offers several options accessible by holding down the + button while turning the instrument on.

3 second (fast response)
Switches from mR/hr and CPM to µSv/hr and CPS
Reset the cal factor to 100.
Probe adjustment settings.
Adjust the CAL factor.
Reset all setting to original factory setting (default).