Interfacial tension meter according to the principle can be divided into two kinds: Platinum Circle law and platinum plate method. Platinum Circle method is a traditional test methods, from discovery to the present time about 70 years or so. It is made of platinum wire perimeter of a certain ring. By testing the first two Platinum Circle immersed not mixed liquid interface (or liquid) 2-3mm, then slowly move up the Platinum Circle contact angle measurement instrument manufacturers, will form a ring with the surface film. Film on Platinum Circle will have a pull down force, the entire measurement process film Circle mention the role of platinum ring for the most vigorous values, and then converted into a real interface (surface) tension. History platinum plate method applied to 20 years in a foreign country is not, even late into the country. Based on the surface of the platinum plate method / interfacial tension meter technically demanding, difficult to manufacture, domestic users really are still widely used in recent years as domestic automatic surface platinum plate method / interfacial tension meter successfully developed and put into the market. Platinum plate method is to use 24mm × 10mm × 0.1mm platinum plate, blasting roughened surface contact angle measurement direct, as is better wetting with the liquid to be measured. When testing the platinum plate lightly touch the screen (or surface), due to the effect of surface tension of liquid platinum plate will be pulled down, when the reverse surface tension of the liquid force and other forces associated with the instrument test the reach equilibrium contact angle measurement, the test value is stable and unchanging, if distilled water, ethanol and the like pure substance, the entire testing process fastest only a few seconds. (L) heating the tube at both ends usually have a longer cold side, and can not play the role of heating. Power Design (2) heating section to try not to exceed the limit of 10 watts / cm. As 30 cm long heating pipe, try not to exceed 300 watts of power. If the design power exceeds this limit, the higher the heating tube surface load, easily oxidized steel corrosion, causing a short circuit. (3) to a temperature higher than 250 ℃ mold design, the use of heat pipe has some difficulties. I have a heating pipe temperature reaches 420 ℃, but the higher the temperature of the heating pipes forming such quality requirements, and the need to frequently check the patency of a short circuit or not. Under these conditions because the heating pipes, terminals, connected with copper, steel and other media are very susceptible to oxidation, resulting in disconnection. Therefore, the electrical transmission medium require special handling, try to avoid conducting wires exposed to the air, to extend the life of the wire. Iron core is also commonly used as a mold heating pipe, is characterized by high power per unit length (usually diameter 10mm, length 8cm specifications iron core can reach 150 watts of output power), durability, safety, easy to form short-circuit breakdown can be buried by drilling blind holes, the disadvantage is difficult to customize the design, replace them brittle, broken. Circuit Design indispensable insurance, air switch insurance policy maintained by the operation to be clean and tidy, good insulation, diligent in checking the operation of electrical failure, to prevent unnecessary danger. Contact angle measuring instrument manufacturer | contact angle measuring instrument | ShengDing instruments provided by Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) strong, credible, in Dongguan, Guangdong specialized instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead ShengDing instrument and you hand into the brilliant, for a better future!