In the search for new oil deposits and mapping their extent, a number of measurements are made down test bore holes and even while drilling a hole. Radiation from a radioactive source is scattered by the rock and detected by a photomultiplier tube and scintillator combination. Special photomultiplier tubes are used which can withstand temperatures of up to 200°C encountered several thousand meters underground.
Related Products
| Product | Description |
|---|---|
| 9110FLB Series | Compact, rugged, 25 mm diameter, 10-stage, blue bialkali, photomultiplier with plano-concave window for use at temperatures up to 150°C. |
| 9110V Series | Encapsulated, compact, rugged, 25 mm diameter, 10-stage, blue bialkali, photomultiplier series for use at high temperatures. |
| 9727B Series | 51 mm diameter, 13-stage, blue bialkali, end window photomultiplier for use at temperatures up to 150°C. |
| 9878B Series | 30 mm diameter, 11-stage, blue bialkali, end window photomultiplier for use at temperatures up to 150°C. |
| 9888B Series | 30 mm diameter, 11-stage, blue bialkali, end window photomultiplier for use at temperatures up to 150°C. |