FIELD: measurement technology.
SUBSTANCE: present invention relates to a device, system and method to measure tackiness of a substance, such as pulp, with an on-line or an in-line sensor having a transparent plate with a surface, where tacky particles can attach. Attached particles are identified by a camera behind the plate. Camera is focused to detect stationary particles attached to the surface. Measurement is performed directly from a process stream or from a side steam, and the plate does not need to be removed from the process for the measurement. Pate material may be plastic, such as polycarbonate or acrylic. Additionally, the flow speed may be kept be low, e.g. < 0.1 m/s, at the measurement position and/or there may be a stagnation point of flow at or near measurement, where the flow speed approaches zero.
EFFECT: technical result is continuous determination of the depositability of the solid matter as it flows through a production process.
35 cl, 11 dwg, 1 tbl
