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NGT-075-B
NGT-075-B是市场上直径最小的伽马探测器，为适应金钻头和钻铤内壁安装特别设计。
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NGT-075-B Specifications
| P/N 204-200-000 | P/N 204-400-000 | ||
| Detector | Scintillator Crystal | Sodium Iodide, Na(TI) | Sodium Iodide, Na(TI) |
| Photomultiplier | R4177A (Hamamatsu) | R4177A (Hamamatsu) | |
| Mechanical | Diameter (OD) | 0.75” | 1.003″ (Sleeve)* |
| Length (make-up) | 13.7” | 14.215″ (Sleeve)** | |
| Weight | 8.4 oz. | 8.4 oz. | |
| End Connectors | Flying lead (Power, GND, Output) | Flying lead (Power, GND, Output) | |
| Material | Aluminum Alloy | Aluminum Alloy | |
| Performance | Sensitivity | .76 CPS/API | .76 CPS/API |
| Accuracy | +/- 5% to 150°C +/- 10% to 175°C | +/- 5% to 150°C +/- 10% to 175°C | |
| Environmental | Operating Temperature | -18°C to 175°C | -18°C to 175°C |
| Survival Temperature (reduced accuracy) | -40°C to 200°C | -40°C to 200°C | |
| Heat/Cool Rate, Max. | 2.8°C (5°F) | 2.8°C (5°F) | |
| Vibration (3 axis) 50-1000Hz, Random | 20G (14G RMS) | 25G (18G RMS) | |
| Shock (3 axis) | 500G, 0.5ms, half-sine | 500G, 0.5ms, half-sine | |
| Power Requirements | DC Input Voltage | 17-48 VDC, 50VDC Max. | 17-48 VDC, 50VDC Max. |
| Tool Current | 8-11 mA | 8-11 mA | |
| Output Signal | Negative Pulse | +5V to GND, 5 uSec width | +5V to GND, 5 uSec width |
* Recommended cavity diameter, 1.0″
** Recommended cavity length, 14.2″