VoidLock™ Needle Solves Pendant Drop Measurement Errors | Surface & Interfacial Tension Accuracy скачать в хорошем качестве

VoidLock™ Needle Solves Pendant Drop Measurement Errors | Surface & Interfacial Tension Accuracy

Testing surface or interfacial tension using the pendant drop method is a standard approach in optical drop shape analysis. It is well known that the pendant drop must be suspended from the very bottom edge of the needle. However, when using a standard fine needle to measure surface tension, the droplet can easily retract onto the outer edge of the needle. For low interfacial or surface tension liquids, it becomes difficult for the droplet to remain suspended beneath the needle. Using a regular thick needle can also lead to the same retraction phenomenon, where the droplet climbs up to the outer edge of the needle, thereby affecting the accuracy of surface tension measurements. KINO Scientific offers the VoidLock™ needle, which effectively prevents droplet retraction and improves suspension stability, thereby enhancing the accuracy of surface and interfacial rheology measurements.