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SPECIFICATIONS:
Detector
Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm2 thick. Effective diameter of window is 9.1 mm (.36 in.).
Operating Range
0-.5, 0-5, 0-50 mR/hr
0-500, 0-5,000, 0-50,000 CPM
or 0-5, 0-50, 0-500 μSv/hr (SI Scale Meter Option)
Range Switch
X1, X10, X100, Battery Check.
Energy Sensitivity
1000 CPM/mR/hr (Cs137).
Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%. Detects beta at 50 keV with typical 35% detection efficiency and beta at 150 keV with typical 75% detection efficiency. Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case
Accuracy
Reference to Cs137
Typically ±15% from factory, ±10% with NIST Source Calibration NIST Calibration Additional
Display
Analog Meter holds full scale in fields as high as 100X maximum reading. CPM & mR/hr scale. Optional SI Scale Meter Available
Audio Indicator
Internally mounted beeper (can be turned off for silent operation).
Outputs
3.5 mm jack with pulse out
Power Requirements
9-volt alkaline battery (included). Approx. 2,000 hrs. at normal background
Temperature Range
-10° to +50°C (14° to 122°F)
Humidity
10% to 70% Non-Condensing
Weight
M4: 200 g (7.1 oz) M4EC: 224 g (7.9 oz)
Size
209 x 71 x 50 mm (8.2 x 2.8 x 1.9 in.)
Includes
Carrying Case w/ Belt Clip
SPECIFICATIONS:
Sensor:
Halogen-quenched Geiger-Mueller detector (LND712)
Mica end window density is 1.5-2.0 mg/cm²
Side wall is 0.012″ #446 stainless steel
Detects Alpha, Beta, Gamma, and X-radiation
Display
4-digit liquid crystal display with mode indicators
Accuracy
±10% typical; ±15% maximum
Alert
No Alert feature. If your intended application requires a user-adjustable Alert, we recommend the Radalert® 100X
Audio
Beeper chirps for each count (can be muted)
Calibration
Cesium 137 (gamma)
Certifications
CE Certified, RoHS Compliant, and Meets WEEE standards
Count Light
Red LED flashes with each count
Designed & Manufactured
Designed and Manufactured in USA by IMI International Medcom, Inc.
Operating Range
µSv/hr: .000-1,100 CPM: 0-350,000
mR/hr: .000-110 CPS: 0-3,500
Total: 0-9,999,000 counts Timer: up to 40 hours
Options
Computer software and cable available
Ports:
Output: Stereo 3.5 mm jack sends counts to computers, data loggers, other CMOS-compatible devices, and headphones, and educational data collection systems.0-9 V, 1 kOhm impedance.
Input: Mono 2.5 mm jack provides calibration input. 0-3.3 V, >5 μs width, rising edge triggered.
Power
One AA alkaline battery (one 9-volt alkaline battery on some models); average battery life typically exceeds 3600 hours at normal background radiation levels at sea level. Battery life decreases as radiation level rises.
Gamma Sensitivity
1,000 CPM/mR/hr referenced to Cs-137
Size
150 x 80 x 30 mm (5.9″ x 3.2″ x 1.2″)
Weight
225 grams (8 oz) including battery
SPECIFICATIONS:
Detector
Internal 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.).
Operating Range
mR/hr – .001 (1µR) to 100
CPM – 0 to 350,000
µSv/hr – .01 to 1000
CPS – 0 to 5000
Total Counts- 1 to 9,999,000 counts
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 and X-rays down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs). Smallest detectable level for 125I is .02 µCi at contact.
Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.
Averaging Periods
This radiation detector 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.
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