IMI Inspector Alert V2 measures alpha, beta, gamma and X-radiation


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The IMI Inspector Alert™V2 measures alpha, beta, gamma and X-radiation using a 2-inch “pancake” GM detector with high sensitivity to common beta and alpha sources. The easy-to-read digital display shows reading in your choice of Dose Rate – µSv/hr or mR/hr, and Count Rate – CPM or CPS. The Total I Timer feature allows timed readings from one minute to 40 hours for precise measurement of low-level contamination. An Audible alert sounds when the radiation reaches a user-adjustable level.

-Quickly alerts user to the presence of harmful levels of nuclear radiation
-Detects noble gases and low energy radionuclides

-Automatically compensates for GM tube dead time

-Will not jam in high radiation fields

-Meets CE Certification, RoHS compliant and WEEE standards

Detector : Halogen-quenched Geiger-Mueller tube Effective diameter 1.75″(45 mm)

Mica window density 1.5-2.0 mg/cm’   Detects Alpha, Beta, Gamma and X-radiation

Display : 4-digit liquid crystal display with mode indicators
Operating Range : µSv/hr:      .01 – 1,100  



mR/hr:      .001 – 110
CPM:         0-350,000
CPS:         0 – 5,000
Total:        1 – 9,999,000 counts
Calibration: Cesium-137 (gamma)
Gamma Sensitivity:







C-14 (Beta)

Bi-210 (Beta)

Sr-90 (Beta)

P-32   (Beta)

Am-241 (Alpha)

3500 CPM/mR/hr referenced to Cs-137
Smallest detectable level for 1-125
is .02 mCi at contact
For 4 pi at contact :
Energy                                     Efficiency
49 keV avg.   156 keV max.        5.3%
390 keV avg. 1.2MeV   max.      32%
546 keV and 2.3   MeV               38%
693 keV avg. 1.7 MeV   max.      33%
  1. MeV         18%
Accuracy : ±10% typical;±15% maximum
Alert Range: µSv/hr:     O to 500 mR/hr:                 O to SO

CPM:         O to 160,000

Beeper sounds the alert

Timer : Can set sampling periods of 1 minute to 40 hours
Averaging Periods: Display updates every 3 seconds, showing the average for the past 30-second time period at normal levels

The averaging period decreases as the radiation level increases

Count Light : Red LED flashes with each count
Audio : Beeper chirps for each count (can be muted)
Ports :
  • Output: Stereo 3.5mm jack sends counts to computers, data loggers, other CMOS-compatible devices, earphones,

and educational data collection systems. 0-9 V, 1 kOhm impedance.

  • Input: 2.5 mm monojack provides calibration input. 0-3.3 V,> Sµs width, rising edge triggered
Anti-Saturation : Readout holds at full scale in fields up to 100 times the maximum reading
Temperature Range: -20° to +50° c,-4° to +122° F
Power: One 9-volt alkaline battery; battery life 2000 hours typical, 700 hours minimum at normal background radiation levels at sea level

Battery life decreases as radiation level rises

Size : 150 x 80 x 30 mm (5.9″ x 3.2″ x 1.2″)
Weight : 323 grams (11.4 oz) including battery
Options : Computer software and cable available
Certifications : CE Certified:

Emissions: EN55011:98+A2 (Class B emissions limits); EN61326:06 (ClassB) RF Emissions

Immunity: EN61326:06 (AnnexC) Portable Test and Measurement Equipment; EN61000-4-2: 95 (ESD); EN61000-4-3:97

RoHS Compliant; Meets WEEE standards


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