No vacuum, no pressurised gasses, no mercury!
|Functional Capability by Model||WAVE Series|
|Mean Pore Size||Y|
The measurement of porosity percentage uses very high frequency conductivity measurements.
Mean Pore Size
The measurement of mean pore size is based on the seismoelectric effect. When an ultrasonic pressure is applied, it causes the so called electrical “double layer” at the interface of the solid surface and liquid, to shear, resulting in a creation of an oscillating current. When double layers overlap the seismoelectric effect is dependent on the pore width.
Zeta Potential of the surface inside the pore structure
Zeta potential measurement uses the same seismoelectric effect. The ultrasound wave causes the highly conductive liquid within the pores to move in relation to the solid surface. This, in turn, causes relative motion of charges that are located in the diffuse layer and on the pores’ surfaces. This is expressed as an oscillating electric current called the Streaming Vibration Current.
The sample is fully wetted with a suitable liquid. The choice of liquid depends on the type of sample and the measurement to be performed.
A suitable probe (two probes in case of the mean pore size measurement) is attached to the surface of the sample.
The electronic circuits perform all the necessary functions with the results displayed on a screen within one or two minutes.
|Functional Capability||WAVE Series|
|MEAN PORE SIZE||3805 only|
|Measuring principle||Electro-acoustic spectroscopy (seismo-electric effect) (electroacoustic spectrometer)|
|Mean pore size (min)||~10nm|
|Mean pore size (max)||>5 µm (5000nm)|
|POROSITY||3805, 2305, 1905|
|Measuring principle||Conductivity (very high frequency)|
|Conductivity||0.001-10 S/m, ± 1%|
|PORE ZETA POTENTIAL||3805, 2305|
|Measuring principle (zeta potential)||non-isochoric streaming-current (seismo-electric effect)|
|Zeta potential (min)||±0.1 mV|
|Zeta potential (max)||no restriction, + or -|
|Zeta potential (resolution)||±(0.1 + 0.5%)|
|PHYSICAL||excluding monitor and probe(s)|
|Dimensions||Height 20.95 cm (8.25in)
Width 33.02 cm (13.00 in)
Depth 40.95 cm (16.13 in)
|Weight||20kg (44 lbs)|
|Electrical||100-240 VAC 50/60 Hz|
Read more about pore size distribution and analysis.
For more information contact us.