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- 12:07, 30 May 2024 Contact Multi-point Photoelectric Liquid Level Sensor SKU: CQRSENYW003 (hist) [593 bytes] Chenqi (talk | contribs) (Created page with "=='''Description'''== CQRobot Contact Water/Liquid Level Sensor, This is a photoelectric water liquid level sensor that is operates using optical principles. The advantages of...")