What is a inline viscometer?

The in-line viscometer is a device that can measure the viscosity of the flow in the pipe by arranging the measuring part of the viscometer in the pipe or in the wall. Many digital products calculate the viscosity in real time, and it is also used as a switch to start other safety devices, adjust the flow rate, adjust the stirring speed, etc. from the viscosity value. The measuring unit continues to vibrate with the same amplitude, and many products detect the viscosity by calculating the resistance value from the amount of change in the vibration. In-line viscometers are used for process control in chemical and food manufacturing sites In-line viscometers are used in chemical factories, plants, food factories, etc. When selecting an in-line viscometer, it is necessary to consider the corresponding flow velocity and viscosity, measurement accuracy, maintainability, and ease of output monitoring. In addition, since the viscosity changes depending on the temperature, if the environment such as temperature changes in the process of the plant, a product that can measure the temperature of the measuring part at the same time is suitable. An example of using an in-line viscometer is shown below. Monitoring the degree of mixing during stirring work in a chemical factory Management of food condition in transport pipes of food factories Management of paint condition The in-line viscometer vibrates the pipe to determine the viscosity of the contents. I will explain the operating principle of the in-line viscometer. The in-line viscometer consists of a measuring unit that connects to the pipe, an operation unit that calculates and outputs the viscosity, and a display unit. The measuring unit has a housing for connecting to the piping, and the piping to be measured contains a rod-shaped detector and a thermometer. The detector also protrudes into the air outside the pipe, and the detector is connected to a probe for sending the measured value to the display unit. At the time of measurement, if a certain amount of vibration is applied to the detector that has jumped out into the air outside the pipe, the detector inside the pipe will also vibrate. The vibration inside the pipe changes its amplitude due to the viscous resistance of the fluid. Viscosity is detected by detecting the magnitude of the amplitude and substituting it into a coefficient for calculating the known viscosity. Monitoring can be performed by displaying the viscosity and temperature calculated by vibration on the display unit.

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