NGT-075 Gamma Tool

NGT-075

0.75″ OD Gamma Tools

The NGT-075 gamma tool is the smallest diameter scintillator gamma tool available on the market today.  With an outside diameter of only 0.75” it is ideally suited for mounting within the drill-collar wall to make superior directional gamma sensors.

Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.

NGT-075

0.75″ OD Gamma Tools

The NGT-075 gamma tool is the smallest diameter scintillator gamma tool available on the market today.  With an outside diameter of only 0.75” it is ideally suited for mounting within the drill-collar wall to make superior directional gamma sensors.

Magnetic materials are kept to an absolute minimum to limit interference with closely mounted magnetometers.

NGT-075 Specifications

Detector Nal(TI) Scintillator Crystal0.53” Diameter  X 4.0” Length
PhotomultiplierR4177A (Hamamatsu)
MechanicalDiameter (OD)0.75”
Length (make-up)13.7”
Weight8.4 oz.
End ConnectorsFlying lead (Power, GND, Output)
MaterialAluminum Alloy
PerformanceSensitivity.76 CPS/API
Accuracy+/- 5% to 300°F
+/- 10% to 350°F
Thin-Bed Resolution (8” hole Diameter)6.8”
EnvironmentalOperating Temperature0°F to 350°F
Survival Temperature (reduced accuracy)-40°F to 400°F
Heat/Cool Rate, Max. 5°F per minute
Vibration (3 axis) 50-1000Hz, Random14G RMS
Shock (3 axis)500G, 0.5ms, half-sine
Power RequirementsDC Input Voltage17-48 VDC, 50VDC Max.
Tool Current8-11 mA
Output SignalNegative Pulse+5V to GND, 5 uSec width
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