Complex sentence: The vibration of the probe itself tends to eliminate build up of material on the probe element; and they are not affected by dust, static-charge build-up from dielectric powders, or changes in conductivity, temperature, pressure or humidity/moisture content.
Split into simpler sentences: The vibration of the probe itself tends to eliminate build-up of material on the probe element. As well, they are not affected by dust, static-charge build-up from dielectric powders, or changes in conductivity, temperature, pressure or humidity/moisture content.