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Process Tomography Systems Tomography involves taking measurements around the periphery of an object (eg process vessel or patient) to determine what is going on inside. The best known technique is CAT scanning in medicine, however process tomography instrumentation is cheaper, faster and more robust. ITS provides electrical tomography instrumentation, software, sensors and technical support. This enables customers to continuously scan a volume and determine the distribution of electrical properties as they change over time. Measurement principles The P2000 operates by taking data from an array of electrodes in contact with the process media. These are either mounted on a baffle / dip-pipe or around the circumference of the pipe or vessel. For a standard 16-electrode sensor, 104 voltage measurements are taken every 20 milliseconds using an AC current and 4-electrode measurement technique. The images show the electrical field lines spreading out into the vessel from a single measurement. They are affected by the presence of conducting (red) and non-conducting (blue) regions. A typical Tomography System: |
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A Tomography Systems contains of the basic Instrument, Sensors and Software.
There are two types of Instruments:
- P2+ System: It measures the conductivity of your samples. So it only works in aqueous Suspensions.
Datasheet- M3000 ECT & ERT: is able to additional measure the Permittivity of the samples. This offers the system the ability to measure gas or other suspensions of emulions like oil.
- Z8000 based on the P2000 but it can measure up to 1000 frames/second. So it allows you to look inside you process in real-time which makes it ideal for vessel or pipeline sensors.
| ERT | ECT | |
| Parameter | Conductivity | Permittivity |
| Processes environment | Conducting (solutions) |
Dry (air / oil) |
| Typical processes |
Mixing, flow of slurries | Powder flow; fluidized beds |
| Sensors | Internal |
External |
| Reference | Single (mean) | Dual (max; min) |
| Also sensitive to |
Temperature | Moisture |
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Tomography Software: you get 2Dimensional Images of your prozess
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