Liquid Cell Accessories for ProboStat

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.

Liquid cell accessories for ProboStat™:

                                                  Liquid cell setup mounted:                                       

                                       

                                                               

Electrical specifications:

• Geometrical factors (area/distance): 0.4,  0.2, and  0.1 m
• Parasitic capacitances (typical): 0.3 - 0.4 pF.

Liquid Cell Setup for ProboStat™ - Supplementary Material to the ProboStat™ Manual