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The Radiation Alert MC1K is a hand-held radiation detector that detects a high range of potentially harmful ionizing gamma and x-ray (40-100 keV) radiation with an internal Geiger-Mueller (G-M) tube, and has an energy-compensated sidewall for a linear reading. This dual-scale, analog meter displays counts per minute (CPM), and milliRoentgen (mR) per hour. Four selectable operational ranges, of X1, X10, X100, or X100, detect gamma rays and x-rays of ionizing radiation. The ranges can be adjusted when the meter face peaks at the highest mR level.
The MC1K model has a red, flashing counter and a beeping noise to indicate each ionizing radiation event. It has a halogen-quenched GM tube for sensing ionizing radiation. It checks radiation levels in the environment and objects, such as particle accelerators, x-ray shielding, and industrial gauges. An audio indicator with an internally mounted beeper can be turned off for silent operation. It has a one-year, limited warranty.
Reading Ranges | Two reading ranges of 0 to 0.5, 0 to 5, or 0 to 50 milliRoentgen (mR) per hour, or 0 to 500, 0 to 5,000, or 0 to 50,000 cycles per minute (CPM). |
Operational Ranges | X1 in 0.05 increments 0 to 1 mR/hr or 0 to 0.01 milliSievert (mSv) per hour; X10 in 0.5 increments 0 to 10 mR/hr or 0 to 0.1 mSv per hour; X100 in 5.0 increments 0 to 100 mR/hr or 0 to 1.0 mSv per hour; X1000 in 50.0 increments 0 to 1000 mR/hr or 0 to 10.0 mSv per hour. |
Accuracy | Factory-calibrated by pulse generator, with accuracy + or -15% of reading full-scale, relative to Cesium 137. |
Energy Sensitivity | 1,000 CPM/mR/hr (Cs137). The energy response for gamma and x-rays through the detector sidewall is flat within +61% or -26% over the range of 40 keV to 100 keV, and within +35% or -17% over the range of 100 keV to 1.3 MeV. |
Sidewall Detection | Energy-compensated sidewall with 2 mm tin filter. 40 keV minimum through the sidewall of the detector. Energy compensation is only effective through the sidewall. |
Temperature Range | -20 degrees to 55 degrees C (-4 degrees to 131 degrees F) and an internal detector. |
G-M Tube | Halogen-quenched, internal Geiger-Mueller tube. The effective diameter is 0.92 cm/0.36”. |
Dimensions | Dimensions are 209 mm x 71 mm x 50 mm (8.2” x 2.8” x 1.9”). |
Weight | 235.7 g (8.3 oz). |
Output | 3.5 mm headphone jack for use with observer software (not included) and Windows-based computers. |
Normal Background Radiation | Approximately 4 CPM. |
Battery | 9-V alkaline battery (not included) for approximately 2,000 hours of continuous use in a normal background. |
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.
SE International manufactures radiation detection products and accessories under the Radiation Alert brand. The company was founded in 1979 and is headquartered in Summertown, TN.
What’s in the Box?
The Radiation Alert Inspector is a hand-held, microprocessor-based radiation detector that detects potentially harmful ionizing alpha and beta particles, and gamma and x-ray radiation, has a four-digit, LCD digital display of millirem (mR) per hour, and function indicators. This radiation detector can detect low 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 counts ionizing radiation changes, and the unit of measurement is selected and displayed using the mode switch. The display shows various indicators, based on the mode setting, the function performed, and remaining battery power. These include low battery, alert, timer, total mode (to see the number of times a reading should be multiplied by to obtain the correct radiation count), calibration mode, utility menu (timer, calibration, alarm set mode), and units of measurement. It has automatic operational ranges for a variety of radiation detection. A red, flashing counter and a beep noise indicate each ionizing radiation change event. The display updates every three seconds. 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. The time period for the moving average decreases, as radiation levels increase. The radiation detector has a 2”, halogen-quenched, uncompensated Geiger-Mueller (G-M) tube with a thin, mica end window for sensing ionizing radiation. A radiation symbol on the front label marks the center of the detector. It is used for surveying naturally occurring radioactive material (NORM) contamination, gross wipe counting, contamination inspection of packages, equipment, and people, regulatory inspections, and for low energy radionuclide detection. This detector has a utility menu on the back of the unit. The menu has a three-second response, and switches the detector from mR/hr and counts per minute (CPM) to μSv/hr and counts per second (CPS). It also can reset the calibration factor to 100, adjust calibration, and reset all settings to the default factory setting. The radiation detector has an audio indicator with an internally mounted beeper that can be turned off for silent operation. The Inspector has a one-year, limited warranty for materials and craftsmanship, and a 90-day warranty on the GM tube.
Reading Ranges | 0.001 (1μR) to 100.00 mR/hr, or 0 to 350,000 CPM, or 0.01 to 1000 μSv/hr, 0 to 5,000 CPS, total counts 9,999,000 μSv/hr |
Calibration | Calibrated electronically using a pulse or function generator. Electronic calibration requires a cable with a 2.5 mm plug, with the tip carrying the signal. |
Accuracy | MR/hr + or - typical (NIST), + or -15% maximum 0 to 100, μSv/hr + or - 10% typical (NIST), + or - 15% maximum .01 to 1000, CPM + or - 10% typical (NIST), + or - 15% maximum 0 to 350,000 (referenced to Cs137). It has a factory default calibration reset option that will automatically reset to auto averaging, mR/hr, CPM, and CAL (calibration) 100. |
Energy Sensitivity | 3340 CPM/mR/hr, referenced to Cesium (Cs) 137. Energy sensitivity detects alpha down to 2.0 MeV. It detects beta at 0.16 MeV with typical 25% detection efficiency at 1 MeV. It detects gamma down to 10 keV through the end window. |
Detection | Smallest detectable level for I-125 is 0.02 μCi at contact. It detects gamma and x-rays down to 10 keV typical through the window, and 40 keV minimum through the sidewall. |
Manual Range Switch | Sets at X1, X10, X100, or X1000 to indicate the multiplication factor which determines the complete radiation level. |
Temperature Range | -10 degrees to 50 degrees C (14 degrees to 122 degrees F), and an internal probe. |
Alert Set Range | 0 to 50 mR/hr, and 1 to 160,000 |
G-M Tube | A halogen-quenched, uncompensated G-M tube with an effective diameter of 1.75”(0.45 mm). |
Window Thickness | 1.4 to 2.0 mg/cm2. |
Normal Background Radiation | Approximately 10 to 20 CPM. The meter will hold at full-scale in fields as high as 100 times the maximum reading for anti-saturation. |
Dimensions | 145 mm x 72 mm x 38 mm (5.7” x 2.8” x 1.5”) |
Weight | 327.4 g (11.55 oz) |
Output | Two 3.5 mm headphone jacks can connect to a computer or datalogger, such as complementary metal-oxide semiconductor (CMOS) or transistor-transistor logic (TTL) device. Sub-mini jack input allows for electronic calibration. The probe port located at the end panel attaches the internal probe. |
Battery | 9-volt alkaline battery for approximately 2,160 hours of operation with continuous use in a normal background. Minimum battery life is 625 hours at 1 mR per hour. |
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.
SE International manufactures radiation detection products and accessories under the Radiation Alert brand. The company was founded in 1979 and is headquartered in Summertown, TN.
What’s in the Box?
6 of 6 people found the following review helpful: By Eric -- (State College, PA USA) - See all my reviews This review is from: Radiation Alert INSPECTOR Microprocessor-Based Ionizing Radiation Detector (Misc.) Excellent meter. I have used one for > 10 years. Called the Inspector because it was designed with a Health Physics Inspector in mind. Light, cpm, mrem/hr (or mSv/hr) pancake GM probe for high efficiency beta detection when looking for low levels of contamination. Easy battery replacement. Built in scalar for very low measurements. It holds its calibration very well. It is not completely reliable for radiation measurements above about 40 mrem/hour. But for laboratory inspectors or the general public, you really don't need anything above 40 mrem per hour anyhow. If you need to measure > 30, grab a separate meter. Extreme beta fields may make it shut off and drop to zero (i have seen this twice), but there were a LOT of betas flying about and if you backed up the meter a few inches it beeped and flashed as over-ranged. It will break if dropped. oops 1 of 1 people found the following review helpful: Amazon Verified Purchase This review is from: Radiation Alert INSPECTOR Microprocessor-Based Ionizing Radiation Detector (Misc.) This gadget is excellent use! It is very high sensitive, because its mica-window of detector is 45mm diameter. Also, alpha, beta rays can be detected and can be used to examine the surface contamination. However, it took me six months to receive this item after ordered. But most Japanese people need this item currently. As you know radioactive contamination is a problem mainly in eastern Japan. I hope Amazon.com and SEintl'inc. conduct many back-orders as soon as possible. |