Brookhaven BI-870 Dielectric Constant Meter
The Brookhaven Instruments BI-870 Dielectric Constant Meter can accurately measure in low and high Dielectric solvents, including mixed liquids and solutions. Simply insert the probe in the liquid to be measured, adjust the two controls on the front panel and read the dielectric constant from the display.
Good Zeta Potential determinations of suspended colloidal particles depend on an accurate knowledge of the dielectric constant of the liquid. For a range of particles of interest a number of different liquids may be used, including mixtures of various proportions creating the need for an accurate measurement of dielectric constant. While literature values of dielectric constants are suitable when using pure liquids values are not readily available for mixtures of liquids. There are no generally acceptable methods of calculating values for mixtures from pure component values. For example, weighting by mole fraction leads to errors of 17% and 6% for the two mixtures. Weighting by volume leads to errors of -8% for Methanol/Water and 2.4% for Dichloro Methane/Benzene respectively.
Features:
- Absolute Accuracy to ± 2%
- Sensitivity ranges: 1-20 and 1-200
- Crystal Controlled Frequency
- Open Structure Probe
- Easy to clean
- Reliable and robust
