The invention discloses a method for measuring surface tension. The method comprises the steps of: making a surface tension sensor; connecting a first end of the surface tension sensor with a voltagemeasuring device, and inserting a second end of the surface tension sensor into liquid to be measured; causing the surface tension sensor to move upward at a preset speed until the second end leaves the surface of the liquid to be measured, at the same time, during the upward movement of the surface tension sensor, generating an electrical signal, and measuring a voltage change by the voltage measuring device; obtaining the relationship between the voltage and the surface tension of the liquid, so as to obtain the surface tension of the liquid to be measured by measuring the voltage. Accordingto the method disclosed by the invention, the surface tension of the liquid to be measured is monitored by generating different electrical signal outputs via the contact-separation of the surface tension sensor and the liquid to be measured with different surface tensions, and the method has the advantages of light weight, low cost, environmental protection and energy saving, convenient maintenance and the like.

Method for measuring surface tension

The invention provides a humidity sensor, a sensor manufacturing method and a preparation method of a humidity sensitive material. The humidity sensor comprises a substrate layer, a first electrode, asecond electrode and a humidity sensitive material, the first electrode and the second electrode are arranged on the substrate layer at intervals, the humidity sensitive material is filled between the first electrode and the second electrode, and the humidity sensitive material is a humidity sensitive material of an aerogel structure. The humidity sensor has a higher response speed.

Humidity sensor, humidity sensitive material and manufacturing method

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Humidity sensor, humidity sensitive material and manufacturing method