Sumeet Instruments & Chemicals
Contact Newsletter Seminars Remote. There are different types of tensiometers with different measuring methods for particular measuring ranges and problems: Force tensiometer: The tensile force which occurs as a result of wetting an immersed probe is measured with reference to the wetted length.
Instruments: K , K20 Bubble pressure tensiometer : The maximum internal pressure of a gas bubble which is formed in a liquid by means of a capillary is measured. Instruments: BP , BPT Mobile Drop volume tensiometer : The volume of a drop of liquid produced at a vertical capillary in another liquid is measured at the moment of its detachment. Instrument: DVT50 Spinning drop tensiometer : A horizontal capillary filled with a bulk phase and a drop phase is set in rotation.
News Jun Feb News Feb Instruments: K , K Bubble pressure tensiometer : The maximum internal pressure of a gas bubble which is formed in a liquid by means of a capillary is measured. For measuring dynamic surface tension as a function of surface age.
Measurement of surface and interfacial tension using pendant drop tensiometry
Drop volume tensiometer : The volume of a drop of liquid produced at a vertical capillary in another liquid is measured at the moment of its detachment. More rarely, it is also used for measuring the surface tension drop phase in air.
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For measuring the dynamic interfacial tension as a function of interface age. Instrument: DVT Spinning drop tensiometer : A horizontal capillary filled with a bulk phase and a drop phase is set in rotation.
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The Wilhelmy plate tensiometer requires a plate to make contact with the liquid surface. It is widely considered the simplest and most accurate method for surface tension measurement. Due to a large wetted length of the platinum plate, the surface tension reading is typically very stable compared to alternative methods.
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As an additional benefit, the Wilhelmy plate can also be made from paper for disposable use. For interfacial tension measurements, buoyancy of the probe needs to be taken into account which complicates the measurement.
This method uses a rod which is lowered into a test liquid. The rod is then pulled out of the liquid and the force required to pull the rod is precisely measured. The method isn't standardized but is sometimes used.europeschool.com.ua/profiles/hetudin/chatear-en-zaragoza.php
TRACKER Automatic drop tensiometers | Teclis-scientific
Interfacial tensions cannot be measured. Due to internal attractive forces of a liquid, air bubbles within the liquids are compressed. The resulting pressure bubble pressure rises at a decreasing bubble radius.
The bubble pressure method makes use of this bubble pressure which is higher than in the surrounding environment water. A gas stream is pumped into a capillary that is immersed in a fluid.