Johnson filters also called Wedge Wire Screen or Johnson Screen or Wedge Wire Profile are intended for the construction of high-quality water wells, oil wells, gas wells and other filtration equipment.
The inspection machine is designed for control of one of the main parameters characterizing the quality of the filter, namely, the constancy of the interwire gap (slot opening) along filter length.
Filter length, m: 8
Measured gaps, mm: 0.05...2
Accuracy, mm: ±0.01
Scanning speed, mm/s: 100