型号：I-ALERT
便携式多功能辐射检测仪 、射线检测仪、核辐射检测仪、表面污染检测仪、剂量率仪产地：美 国
I- Alert手持式α、β、γ和X多功能核辐射仪为您提供了快速、精确、便捷的辐射检测手段。既可做辐射剂量率检测又能用于表面污染测量，本产品采用GM探测方法，用以监测放射性工作场所和表面 ,实验室的工作台面、地板、墙壁、手、衣服、鞋的α、β、γ和X放射性污染计数测量以及环境剂量率，是一款性价比高的辐射测量仪器。常用于：
1.检查局部的辐射泄露和核辐射污染；
2.检查石材等建筑材料的放射性；
3.检查有核辐射危险的填埋地和垃圾场；
4.检测从医用到工业用的X射线仪器的X射线辐射强度；
5.检查地下水镭污染；
6.检查地下钻管和设备的放射性；
7.监视核反应堆周围空气和水质的污染；
8.检查个人的贵重财产和珠宝的有害辐射；
9.检查瓷器餐具玻璃杯等的放射性；
10.精确定位辐射源；
11.家居装饰的检测。
技术性能与特点：
1、四位液晶显示
2、检测α、β、γ和X射线
3、计数测量、总计数测量和剂量率测量
4、1分-24小时定时测量
5、对Cs-137源为5.8Cps/μSv/h;
探测下限：对I-125是0.02微居;
6、效率（4π）：接触下：对Sr-90源约38%，C-14源约5.3%；P32源约33%；Co-60源约3%
7、G-M 计数管,有效直径45mm,云母窗密度1.5-2.0mg/Cm3;
8、精度μSv/h：≤500μSv/h；范围时≤15%，在500-1000μSv/h范围≤20%；
CPS：≤2500 CPS范围时≤15% ，在2500-5000CPS范围≤20%；
9、测量单位：该检测仪常用单位（Mr/h或CPM）或SI单位（μSv/h或CPS）
10、测量范围：
0.001-100mR/hr
0.01-1000μSv/ hr
0-350,000 CPM
0-5000 CPS
0-9999000 总计数
精 度：±15%
电 源：9V层叠电池
外形尺寸：150*80*30mm
重 量：323g(含电池）
产 地：美国
Handheld Surface Contamination Meter
The Inspector Alert 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 readings in your choice of mR/hr, CPM, CPS, or μS/hr. The Total/Timer feature allows timed readings from one minute to 24 hours for precise measurement of low level contamination. An audible alert sounds when the radiaiton reaches a user-adjustable level.
Quickly alerts first responders to the presence of harmful levels of nuclear radiation
Improves safety in the laboratory and in the field
Automatically compensates for GM tube dead time
Will not jam in high radiation fields
Meets CE certification requirements for Europe
Specifications:
Detector: Halogen-quenched Geiger-Mueller tube. Effective diameter 1.75" (45 mm). Mica window density 1.5-2.0 mg/cm2.
Display: 4-digit liquid crystal display with mode indicators
Operating Range: mR/hr: .001 to 100.0
CPM: 0 to 350,000
Total: 1 to 9,999,000 counts
μSv/hr: .01 to 1,000
CPS: 0 to 5,000
Gamma Sensitivity: 3500 CPM/mR/hr referenced to Cs-137
Smallest detectable level for I-125 is .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%
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. User can select fast 3-second averaging period
Timer: Can set 1-10 minute sampling periods in one-minute increments, 10-50 minute sampling periods in 10-minute increments, and 1-24 hour sampling periods in 1-hour increments
Alert: Beeper sounds the alert
User-adjustable alert level is set using three buttons
Accuracy: ± 15% up to 50 mR/hr; ± 20% up to 100 mR/hr
Anti-Saturation: Readout holds at full scale in fields up to 100 times the maximum reading
Temperature Range: -20o to +50o C , -4o to +122o F
Power: One 9-volt alkaline battery; battery life is average 2160 hours at normal background, average 625 hours at 1 mR/hr with beeper off
Size: 150 x 80 x 30 mm (5.9" x 3.2" x 1.2")
Weight: 323 grams (11.4 oz) including battery
I/O Ports: Dual miniature jack for CMOS or TTL devices, sending counts to computer or data logger. Submini jack for electronic calibration.
Count Light: Red LED flashes with each radiation event
Audio: Beeper beeps with each radiation event; can be muted
Options: Wipe test plate
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