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Inspector Survey Meter
Radiation detection in a compact hand-held unit
The Inspector is a microprocessor controlled radiation measuring 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 audible beep, providing instant indications of the radiation level. Other benefits include an adjustable timer and external calibration controls.
External Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.77 in.). Radiation symbol on label marks the center of the detector.

Operating Range
mR/hr - .001 (1R) to 100 CPM - 0 to 350,000
Sv/hr - .01 to 1000 CPS - 0 to 5000
Total/Timer - 1 to 9,999,000 counts
Accuracy (Referenced to Cs137)
Typically 15% from factory, 10% with NIST Source Calibration

Energy Sensitivity

Detects Alpha down to 2 MeV. Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV is
approx. 25%. Detects Gamma down to 10 KeV through the end window. 3340 CPM/mR/hr (Cs137). Smallest detectable level for I125 is .02 Ci at contact.

Built-In Efficiencies
Sulfur (S35), Strontium (Sr/y90), Cesium (Cs137), Phosphorus (P32), Carbon (C14), Iodine (I131), Cobalt (Co60), and Alpha

Selectable Alert Set Range
mR/hr .001 - 50 and CPM 1 - 160,000. 70db @ 1m. Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and Sv/hr / CPS. Alarm will sound when in Timer Mode when set alarm threshold is reached.

Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.

Averaging Periods
Display updates every 3 seconds. At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.
Energy Response Curve

Backlit 4 digit liquid crystal display with indicators. Display updates every 3 seconds.

Count Light
Red LED flashes with each radiation event.

Audio Indicator
Internally mounted beeper (can be switched off for silent operation)

3.5mm jack for CMOS or TTL devices and counts to computer or datalogger.
USB for use with Free Observer USB Software for PCs

Power Requirements
One 9-volt alkaline battery. Battery life is approx. 2160 hours at normal background.

Temperature Range
-10C to 50C (14F to 122F)

635 g (22.4 oz.)

150 x 80 x 30 mm (5.9 x 3.1 x 1.2 in.)
Probe: 260 X 70 X 25 mm (10.25 X 2.75 X 1 in)

Probe Construction
Anodized aluminum housing
Size - Approx. 8.75 in. (22.23 cm) Dia.: 2.75 in. (7.0 cm)
Connector - BNC
Handle - Black foam grip

Carrying Case, Observer USB Software Download, USB Cable, Certification of Conformance.

Serial Observer Software

Limited Warranty
1 year limited warranty
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