NGT-100 Gamma Tool (182°C)
NGT-100
Ruggedized, Gamma Tool (1.0”)
The 1.0” diameter NGT-100 is CBG’s next generation small diameter gamma that is ideally suited for mounting within drill-collar walls for azimuthal gamma or bulk gamma applications. New patent pending electrical and mechanical designs push the operating temperature to 182°C, improve shock and vibration performance.
Electronics
The NGT-100 contains CBG’s new patent pending electronics designs. Encapsulated and cushioned within pre-molded high-temperature silicone pads, the printed circuit boards are protected from extreme shock and vibration. A new and innovative technique for providing electronics temperature compensation ensures a more stable output signal through the full range of operating temperatures. A burst filter has been added to reduce spurious counts that can result from excessive shock and vibration, as well as external transient noise.
Mechanical
Included in the NGT-100 is a new patent pending approach to mounting the crystal and phototube for improved shock and vibration performance. The circuit boards and wiring are enclosed beneath metal covers preventing exposure to external noise and physical damage.
NGT-100
Ruggedized, Gamma Tool (1.0”)
The 1.0” diameter NGT-100 is CBG’s next generation small diameter gamma that is ideally suited for mounting within drill-collar walls for azimuthal gamma or bulk gamma applications. New patent pending electrical and mechanical designs push the operating temperature to 182°C, improve shock and vibration performance.
Electronics
The NGT-100 contains CBG’s new patent pending electronics designs. Encapsulated and cushioned within pre-molded high-temperature silicone pads, the printed circuit boards are protected from extreme shock and vibration. A new and innovative technique for providing electronics temperature compensation ensures a more stable output signal through the full range of operating temperatures. A burst filter has been added to reduce spurious counts that can result from excessive shock and vibration, as well as external transient noise.
Mechanical
Included in the NGT-100 is a new patent pending approach to mounting the crystal and phototube for improved shock and vibration performance. The circuit boards and wiring are enclosed beneath metal covers preventing exposure to external noise and physical damage.
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 |