This instrument specifically detects the contact angle and interfacial tension within the pores of filter media, thereby obtaining the wettability of the material liquid to the filter media pores. Traditional sessile drop methods are susceptible to liquid droplet penetration, resulting in large measurement errors and primarily measuring the filter media surface. As is well known, the filtration accuracy and efficiency of filter media primarily depend on the pore throat diameter and the wettability of the material liquid; therefore, the test results of this instrument are more valuable.
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