构件：

①立柱2根，柱间间距可为10呎～32呎（3米～10米）；
②每个立柱上装有2个有机塑料闪烁探测器，每个探测器尺寸为30″（高）x6″（宽）x1.5″（厚）（76x15x3.8cm3），全系统总探测器体积约1080吋3（约17.6升）；
③控制器，一台SC-770控制器装在主柱上，带256K存储器，可至少存储3个月的数据，带有一个LCD（液晶显示屏），4行x16字符，带有数字键盘及RS-232通讯端口；
④一台SCA-775单道分析仪；
⑤远红外位置探测器一个；
⑥提供声音和视觉报警指示；
⑦内置电池，可充电锂电池，可连续供电，供系统连续运行24小时；
   外形尺寸：96″/120″（高）x10″（宽）x10″（厚）（244/305x25x25cm）
   重 量：每柱约300磅（136kg）
   选 购 件：AM-270报警器，可提供远距（距监测器最大距离300呎-约90米）的声音和视觉报警。
   产 地：美国TSA公司

   其他说明：车载物质放射性检测系统由检测探头（两个）及一个核素识别器（可选）、系统控制器、操作人员辐射防护仪（可选）、操作终端、红绿灯控制器（可选）、监视录像系统（可选）及应用软件（可选）组成。检测探头分别布置在卡车通道的两侧，检测出的信号送至系统控制器进行处理。若检测出有放射性物质时，在操作终端上可显示相应的报警信号、报警数据，并可对检测数据自动进行记录和打印，同时红绿灯控制器发出车辆禁止通行的信号。配备个人辐射监测仪器的专业人员根据核素识别器分析何种放射性物质，进行后续处理。

   数据传送方式：车载物质放射性检测系统（配有网络通讯卡与EMS的网络相联，可将放射性检测装置的检测、报警信号通过EMS网络可与EMS的环保系统连接。）

SENSITIVITY: Gamma: Will detect 1,000g of 235U (HEU) or 10g of 239Pu, 50% probability of detection, 95% confidence in a 20 uR/hr background at a passage speed of 5 mph (8km/h) when tested in accordance with ASTM International Standard C 1169 Neutron: Will detect less than 200g of plutonium in a shielded container that reduces the gamma flux to 1% of the unshielded gamma flux Refer to Los Alamos publication number LA-13247-MS*, April 1997, "An Update for the Applications Guide to Vehicle SNM Monitors".

DETECTORS: VM-250A: Two, 30"h x 6"w x 1.5"d (76 x 15 x 3.8cm) organic plastic scintillator detectors per pillar; provides approximately 1,080 in3 (17.6 liters) of detector volume per pillar VM-250AGN: Two, 30"h x 6"w x 1.5"d (76 x 15 x 3.8cm) organic plastic scintillator detectors per pillar and four, 2" diameter x 36" (5 x 91cm) 3He tubes per pillar; provides approximately 1,080 in3 (17.6 liters) of detector volume per pillar

FALSE ALARM RATE: Typically less than 1 in 1,000 passages

ALARM INDICATION: Alarms are indicated by a red strobe light mounted on the master pillar. High and low faults along with other fault conditions are indicated by an amber light. Neutron alarm is indicated by a blue strobe light.

DISPLAY: Alphanumeric LCD, 4 lines x 16 characters

COMMUNICATIONS: Both models are equipped with RS-232 and Ethernet communications capability.

DATA STORAGE: 256k bytes of flash memory is used to store average hourly background data and alarm data. Under normal conditions the memory should be adequate to store data for at least 3 months of operation.

POWER REQUIREMENTS: 90 - 250 Vac, 47 - 63 Hz, less than 100 VA

BATTERY LIFE: Greater than 24 hours of normal operation

DIMENSIONS: VM-250A: 120"h x 10"w x 10"d (305 x 25 x 25cm) per pillar VM-250AGN: 120"h x 26"w x 8"d (305 x 66 x 20cm) per pillar

WEIGHT: VM-250A: ~300 lb (136kg) per pillar VM-250AGN: ~600 lb (273kg) per pillar

ENVIRONMENTAL: -30° to 122°F (-34° to 50°C) Designed for outdoor use in most climates. For extreme conditions, optional heating/cooling is available.

OPTIONAL COMPONENTS: Heaters and Insulation, AM-270

*The Los Alamos publication number LA-13247-MS*, April 1997, "An Update for the Applications Guide to Vehicle SNM Monitors" is available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831, (423) 576-8401. It is available to the public from the National Technical Information Service, US Department of Commerce, 5285 Port Royal Road, Springfield, VA 22616.