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                                    NGT-TX2
                                NGT-T2NGT-TX2 伽马探测器是NGT-TX 的下一代版本,采用CBG新专利的新电气和机械设计将工作温度提高到 182°C,正在申请专利的新方法安装晶体和光电管,以改善冲击和振动性能并提高到 25 GRMS,比竞争工具高 25%以上。NGT-TX2 包含 CBG 正在申请专利的新电子设计,电路板封装在预成型的高温硅胶垫中,可免受极端冲击和振动,同时一种用于提供电子元件温度补偿的新型创新技术可确保在整个工作温度范围内提供更稳定的输出信号,此外NGT-TX2增加了突发滤波器,以减少因过度冲击和振动以及外部瞬态噪声而导致的杂散计数。同时电路板和导线被封闭在金属盖下,不再受到外部噪声或物理损坏的影响。所有承重螺钉均已移除,以提高可靠性。
                            
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                        NGT-TX2 Specifications
P/N 203-100-000
| Detector | Scintillator Crystal | Sodium Iodide, Na(TI) | 
|---|---|---|
| Photomultiplier | R3991A (Hamamatsu) | |
| Mechanical | Diameter (OD) | 1.36” | 
| Length (make-up) | 11.6” | |
| Weight | 1.5 lb. | |
| End Connectors | Micro-D Subminiature, 15-Pin | |
| Material | Aluminum Alloy | |
| Performance | Sensitivity | 1.14 CPS/API* | 
| Accuracy | +/- 5% to 150°C +/- 10% to 182°C | |
| Environmental | Operating Temperature | -18°C to 182°C | 
| Survival Temperature (reduced accuracy) | -40°C to 200°C | |
| Heat/Cool Rate, Max. | 2.8°C (5°F) per minute | |
| Vibration (3 axis) 50-1000Hz, Random | 35G (25G RMS) | |
| Shock (3 axis) | 1000G, 0.5ms, half-sine | |
| Burst Filter | Reduces spurious counts due to extreme shock/vibration and external system electronic noise. | |
| Power Requirements | DC Input Voltage | 10v – 50v, 60v Max. | 
| Tool Current | 8-11 mA | |
| Output Signal | Negative Pulse | +5V to GND, 5 uSec width | 
* Counts are collected with gamma tool mounted within a standard BeCu pressure barrel, (OD 1.875″, ID 1.500″). API Calibration performed with AEA Technology, QSA Inc., KUTh Field Verifier #188074, S/N 255 Radionuclides: K-40(11.7%), U-238(90 ppm), Th-232(40 ppm).