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NGT-100
NGT-100是CBG 2023年新推出的一款新一代小尺寸伽马传感器，其直径为 1.0 英寸，适合安装在钻铤壁内。采用多项新的技术，包括新的电子电路、抗震处理、，散热处理。相比较上一代0.75英寸的伽马传感器，NGT-100抗震性提高 43%，灵敏度提高 67%，是更苛刻钻井环境的完美小直径解决方案。
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NGT-100 Specifications
P/N 208-000-000
| Detector | Scintillator Crystal | Sodium Iodide, Na(TI) |
|---|---|---|
| Photomultiplier | Hamamatsu R3991A | |
| Mechanical | Diameter (OD) | 1.0” w/out shrink tubing sleeve 1.04” w/shrink tubing sleeve |
| Length (make-up) | 12.0” | |
| Weight | 14 oz. | |
| Connectors | Flying lead (PWR, GND, Signal Out) | |
| Material | Aluminum Alloy | |
| Performance | Sensitivity | 1.25 CPS/API |
| Accuracy | +/- 5% to 150°C +/- 10% 150°C to 182°C | |
| Environmental | Temperature (Operating) | -18°C to 182°C |
| Temperature (Survival) w/ reduced accuracy | -40°C to 200°C | |
| Temperature ramp rate | 2.8°C (5°F) per minute | |
| Vibration (3 axis) 50-1000 Hz, Random | 30G (20G RMS) | |
| Shock (3 axis) | 750G, 0.5 ms, half-sine | |
| Burst Filter | Reduces spurious counts due to extreme shock/vibration and external system electronic noise. | |
| Power Requirements | Power (DC input Voltage) | 10v-50v, 60v Max |
| Tool Current | 8-11mA | |
| Output Signal | Output Signal | Negative Pulse, +5V to GND, 5 usec pulse width |