OrderNow International Medcom Inspector Alert Digital Surface Contamination Radiation Monitor
The International Medcom Inspector Alert is a hand-held radiation detector used to detect potentially harmful ionizing alpha and beta particles, and gamma and x-ray radiation, and has a large, 2-inch, Gieger-Mueller (G-M) pancake tube, automatic compensation, an accumulated total timer function, and LCD digital display of milliroentgens (mR) per hour (mR/hr), counts per minute (CPM), microSieverts (μSv) per hour (μSv/hr), or counts per second (CPS). This radiation detector has the ability to detect levels of the four main types of ionizing alpha and beta particles, and gamma rays and x-rays over automatic operational ranges. It is optimized to detect small changes (low levels) in radiation levels and to have high sensitivity to many common radionuclides.
The Inspector Alert radiation detector has a large (2-inch), halogen-quenched, pancake-shaped G-M tube with a mica window on its back side for sensing ionizing radiation. It automatically compensates for accuracy across radiation ranges, and is designed to not jam in high radiation fields. The radiation detector has an audible alert feature that signals when radiation reaches a user-defined level. It features a 4-digit LCD digital display with mode indicators that updates every three seconds, and can be muted. It displays current radiation level in mR/hr, or CPM; or when SI (metric) units are selected, in μSv/hr, or CPS. The detector counts ionizing radiation changes at 3-second intervals. At low background levels, which are typical in a geographic area, the update is the moving average for the most recent 30-second time period at normal levels. A moving average helps smooth out short-term data fluctuations. The time period for the moving average decreases, as radiation levels increase. Users can select a fast 3-second averaging period. A red, LED light flashes with each ionization event. The instrument has an accumulated total count and timer function that provides total event count for a timed period (from one minute to 24 hours) to determine average CPM for higher accuracy. The radiation detector has an audio indicator with an internally mounted beeper that can be muted. Total timer, audio on/off and units of measurement are selected and displayed using the front-panel mode indicators. The utility menu allows modification of the default settings for several operating parameters.
The Inspector Alert works in laboratory and field applications. It is used for surveying levels of potentially harmful ionizing particles and rays in the environment such as in first responder, personal safety, surface and food contamination detection, naturally occurring radioactive material contamination (such as granite), and in the scrap metal, and uranium mining industries. It comes in a protective hard carrying case. The Inspector Alert has Conformite Europeene (CE)-certification. It comes with a one-year, limited warranty for materials and craftsmanship, and a 30-day warranty on its G-M tube.
Specifications
| Sensor | Geiger-Mueller detector with mica end window density 1.5 to 2.0 mg/cm2 density. Effective diameter 1.75” (45mm) |
| Side wall | 0.012” 446 stainless steel |
| Operation ranges | 0.001 to 110 mR/hr, 0 to 350,000 CPM
0.01 to 1,100 μSv/hr, 0 to 5,000 CPS
0 to 9,999,000 total counts |
| Timer operation range | 1 minute to 24 hours |
| Gamma sensitivity | 3500 CPM/mR/hr referenced to Cs-137. Smallest detectable level for I-125 is 0.02 μCi at contact |
| Efficiency | For 4 pi geometry at contact |
| Beta | C-14 (49 keV avg 156 keV max): 5.3%
Bi-210 (390 keV avg 1.2 MeV max): 32%
Sr-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% |
| Calibration | Cesium 137 (gamma) |
| Sensitivity | 1000 CPM/mR/hr referenced to Cesium (Cs)137, detected through the end window |
| Accuracy | + or - 15% up to 50 mR/hr; + or -20% up to 100 mR/hr |
| Timer | 1-10 minute sampling periods in one-minute increments
10-50 minute sampling periods in 10-minute increments
1-24 hour sampling periods in 1-hour increments |
| Alert | Beeper sounds the alert. User-adjustable alert level is set using 3 buttons |
| Audio | Beeper beeps with each radiation event. Sounds can be muted |
| Count light | Red LED flashes with each radiation event |
| Anti-saturation | Readout holds at full scale in fields up to 100 times the maximum reading |
| Temperature range | - 20 degrees to + 50 degrees C
- 4 degrees to + 122 degrees F |
| Output | Dual mini jack for Complementary Metal-Oxide Semiconductor (CMOS) or Transistor-Transistor Logic (TTL) devices, sending counts to computer or data-logger |
| Input | Sub-mini jack for electronic calibration |
| Power | One 9V alkaline battery (not included) for approximately 2,160 hours of operation with continuous use in normal background. Minimum battery life is 625 hours at 1 mR/hr with beeper off |
| Dimensions | 150 x 80 x 30 mm (5.9 x 3.2 x 1.2 inches) [H x W x D] |
| Weight | 323 g (11.4 oz.) (including battery, which is sold separately) |
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Radiation detectors, sometimes called Geiger counters or G-M counters, can detect a broad range of ionizing alpha and beta particles, and gamma and x-rays that may be emitting harmful levels of radiation. Many detectors sense ionizing radiation with an enclosed Geiger-Mueller (G-M) tube to count radiation particles or rays. Alpha and beta particles are measured in counts per minute (CPM) or counts per second (CPS). Gamma rays and x-rays are measured in milliRoentgens (mR) per hour, microSieverts (μSv) per hour, or milliSieverts (mSv) per hour. Alpha particles are positively charged and heavier than beta particles, and have a limited range of approximately 3 to 5 centimeters by air. Alpha particles can be shielded by objects such as paper and unopened skin. High-energy beta particles are electrons, heavier than gamma rays, and can take either a positive or negative charge. Beta particles can be shielded by aluminum or wood. High-frequency (short wavelength) gamma rays are the strongest and lightest rays. Gamma rays are more penetrating than alpha and beta particles. They can be shielded by dense materials such as lead, and large masses of concrete, hardened steel, or water. X-rays are man-made gamma rays, and have essentially the same properties and function. Radiation detectors commonly have either an analog or a digital display. Analog radiation detectors output with a needle-point scale, and digital units generate a numerical LCD digit display. Radiation detectors are commonly used by hobbyists for safety detection and rock inspection, and professionals in the in the nuclear, medical, mining, instructional, and research industries.
International Medcom, Inc. distributes radiation detection instruments and systems for the health and safety, environmental protection, and education industries. The company was founded in 1986, and is headquartered in Sebastopol, CA. Many International Medcom products have International Organization for Standards (ISO) or Conformite Europeene (CE) certification.
What’s in the Box?
- Inspector Alert radiation detector
- Hard carrying case
- Instruction manual
- CE certification
Radiation detector used when quick readings that call for heightened sensitivity are needed to survey levels of potentially harmful ionizing particles and rays in the environment, such as in first responder, personal safety, surface and food contamination detection, naturally occurring radioactive material contamination (such as granite), and in the scrap metal, and uranium mining industries Device is not energy compensated, and allows for detection of ionizing radiation types such as alpha and beta particles, and gamma rays and x-rays Large, 2-inch, halogen-quenched, pancake-shaped Geiger-Mueller (G-M) tube with mica window for heightened sensitivity to radiation detection LCD lighting displays digital reading of current radiation level in milliroentgens (mR) per hour (mR/hr), or counts per minute (CPM); or when SI (metric) units are selected, in microSieverts (μSv) per hour (μSv/hr), or counts per second (CPS) Provides total count for a timed period (from one minute to 24 hours) to determine average CPM over a period of time for higher accuracy and precision measurement
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