Abstract: A bearing arrangement includes a bearing having an inner race and an outer race and a plurality of rolling elements arranged between the inner and outer race such that the first race is rotatable relative the second race; bearing lubricant arranged within the bearing to lubricate the rolling elements. The bearing arrangement provides a first electrically conductive portion and a second electrically conductive portion, the first and second electrically conductive portion being electrically insulated and arranged such that at least a portion of the bearing lubricant is located between the first and second electrically conductive portion; and a capacitance meter having a first electrode connected to the first electrically conductive portion and a second electrode connected to the second electrically conductive portion, configured to measure a capacitance between the first ring and the second ring to determine a water content in the lubricant based on the measured capacitance.

Abstract: A bearing arrangement is disclosed. The bearing arrangement includes a bearing with a bearing lubricant. A first electrically conductive portion and a second electrically conductive portion, which have different electronegativities, are in direct contact with the bearing lubricant. The bearing lubricant and the first and second electrically conductive portions form an electrolyte and two electrodes, respectively, of an electrochemical cell. The bearing arrangement further includes a sensor connected to the first electrically conductive portion and to the second electrically conductive portion, the sensor being configured to measure at least one of a current and a galvanic potential between the first and second electrically conductive portions and to determine a water content in the bearing lubricant based on the measurement.

Abstract: A bearing arrangement includes a bearing having an inner race and an outer race and a plurality of rolling elements arranged between the inner and outer race such that the first race is rotatable relative the second race; bearing lubricant arranged within the bearing to lubricate the rolling elements. The bearing arrangement provides a first electrically conductive portion and a second electrically conductive portion, the first and second electrically conductive portion being electrically insulated and arranged such that at least a portion of the bearing lubricant is located between the first and second electrically conductive portion; and a capacitance meter having a first electrode connected to the first electrically conductive portion and a second electrode connected to the second electrically conductive portion, configured to measure a capacitance between the first ring and the second ring to determine a water content in the lubricant based on the measured capacitance.

Abstract: A bearing arrangement is disclosed. The bearing arrangement includes a bearing with a bearing lubricant. A first electrically conductive portion and a second electrically conductive portion, which have different electronegativities, are in direct contact with the bearing lubricant. The bearing lubricant and the first and second electrically conductive portions form an electrolyte and two electrodes, respectively, of an electrochemical cell. The bearing arrangement further includes a sensor connected to the first electrically conductive portion and to the second electrically conductive portion, the sensor being configured to measure at least one of a current and a galvanic potential between the first and second electrically conductive portions and to determine a water content in the bearing lubricant based on the measurement.