簡介
The ProboStat™ system can be equipped with a liquid cell accessories to measure the dielectric constant of liquids at elevated temperature.
Typical use:
- Dielectric measurements of liquids at RT - 200°C
- Replaces a standard sample support tube assembly
- Use in combination with e.g. heating mantle
- ca. 0.1 – 0.5 ml measured volumes
The current version can be used up to about 200°C, but the system can be modified to be used at even higher temperatures.
The liquid cell accessories comprise the following special parts:
- A large-diameter metal support tube on a socket that fits on the pedestal of the ProboStat™.
- A metal sample container cup that forms the sample compartment walls and acts as guard electrode. The bottom electrode is fastened in the cup by a PEEK insulator and Viton O-ring seals. These parts are detachable for replacement and rinsing.
- Metal top electrode, centering plate.
- Inner and outer electrode contacts, thermocouple.
- Teflon sample compartment rings with a groove ring to define the sample volume. The sample volume is 16 mm in diameter and 0.50, 1.00 or 2.00 mm high. Teflon cylinder with cut-outs for spring load and electrode wires.
- Spring load assembly consisting of insulated Kanthal wire.
- The materials used that are in contact with the liquid are brass, PEEK, and Teflon.
Electrical specifications:
- Geometrical factors (area/distance): 0.4, 0.2, and 0.1 m
- Parasitic capacitances (typical): 0.3 - 0.4 pF.
The current version can be used up to about 200°C, but the system can be modified to be used at even higher temperatures.
The liquid cell accessories comprise the following special parts:
- A large-diameter metal support tube on a socket that fits on the pedestal of the ProboStat™.
- A metal sample container cup that forms the sample compartment walls and acts as guard electrode. The bottom electrode is fastened in the cup by a PEEK insulator and Viton O-ring seals. These parts are detachable for replacement and rinsing.
- Metal top electrode, centering plate.
- Inner and outer electrode contacts, thermocouple.
- Teflon sample compartment rings with a groove ring to define the sample volume. The sample volume is 16 mm in diameter and 0.50, 1.00 or 2.00 mm high. Teflon cylinder with cut-outs for spring load and electrode wires.
- Spring load assembly consisting of insulated Kanthal wire.
- The materials used that are in contact with the liquid are brass, PEEK, and Teflon.
Electrical specifications:
- Geometrical factors (area/distance): 0.4, 0.2, and 0.1 m
- Parasitic capacitances (typical): 0.3 - 0.4 pF.