Automatic Bubble Tension Meter

Technical principle   
Put the fluid to be measured into the heated sample container, a glass or Teflon capillary will do given the depth of immersion is immersed in the liquid, the capillary tube is connected to a gas interface and a sensitive pressure sensor ,during the test, a gas or an inert gas through the capillary, the capillary end in the formation of bubbles, and the measured pressure of the bubble.
When the bubble pressure tension meter SIT07 continuously improves the flow rate of the gas, accelerating the frequency of bubble formation, a corresponding reduction in each bubble lifetime. During the experiment set out the bubble speed and frequency. When the radius of bubble at end of the capillary is equal to the radius of the capillary, bubble pressure reaches maximum. Once the bubble radius is beyond than the radius of the capillary, the bubble pressure is significantly reduced. The maximum bubble pressure is proportional to dynamic surface tension. The hydrostatic pressure P is proportional to the immersion depth of the capillaries.

System parameters
1. Measuring range: 10-100 mN / m, the measurement accuracy: 0.1 mN / m
2. The bubble frequency range :( rely on the liquid used and capillary): 0.05-30 Hz
3. The level control: precise level position control
4. The liquid bubbles :( life decisions and capillary used): 5 ms - 50 sec
5. The number of bubbles collection: 1-20 bubbles / sec
6. Temperature range: room temperature or -5 ° C-95 ° C (for an external water bath)
7. Temperature Resolution: ± 0.1 ° C

SIT07 series dynamic bubble pressure tension meter
1. SIT07A dynamic pressure of the bubble tension meter (1 to 10 bubbles / sec)
2. SIT07B dynamic pressure of the bubble tension meter (1 to 20 bubbles / sec)
3. SIT07C online dynamic pressure of the bubble tension meter (1 to 20 bubbles / sec)