Thurning Instruments Ltd.
Densitometers|
Typical installations The simplest Thurning densitometer (shown here) consists of a small gamma source and a single ionisation tube detector.The source is installed in a shielding container with a hand-operated shutter. The source container, detector and shielded measurement zone form a single unit, which is mounted on the pipe. |
|
|
|
At the other end of the size scale, this photograph shows a three-beam system for steam-water two-phase flow measurement in a 400 mm diameter stainless steel pipe. Due to operating temperature and pressure constraints, the pipe wall thickness in the beam path is 15 mm on each side of the pipe. This system uses a Caesium source, with large scintillation detectors. Measurement resolution is better than 15 kg/m3 at 100 msec sampling interval. |
|
This photograph shows an instrument measuring the density of a polar ice core at minus 20ºC. The measurements provide information on gas and particle inclusions. Similar scanning instruments are used for examining rock and sediment cores. X-ray densitometers can be used to find low concentrations of heavy elements in mineral exploration core samples. |
|
Last updated 18-1-2000
If you have any comments on the THURNING web site please contact
Richard Fortescue
