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）
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
