Lead-acid storage battery electrolyte level indicator

摘要

The level indicator comprises a sensor rod fitting through the battery cover (2) and depending into the electrolyte contained in the battery housing. When the electrolyte level (4) drops below the level of the sensor's bottom end, an optical signal is provided.The sensor comprises an electrolyte resistant light conductor rod (6) and a light source (15) at its top end providing a light signal which is reflected from the surface of the electrolyte when this lies below the bottom end of the rod, to control a device (11) providing the optical indication signal.