| 摘要 |
A breather (100) including desiccant (118) for humidity control includes an electronic end of life detection system. A temperature sensor (120) and humidity sensor (102) provide a temperature and humidity of the desiccant (118) to a controller (104). The controller determines the relative humidity of the desiccant. The controller (104) determines that the desiccant (118), and thus breather (100), has reached its end of life (i.e., end of useful life) when a relative humidity calculated form the temperature and humidity by the controller (104) reaches a predetermined relative humidity (e.g., 40%). Optionally, a pressure sensor (140) provides a pressure of the reservoir to the controller (104). The controller (104) determines a fault condition or end of life condition of the breather (100) when the pressure exceeds a predetermined pressure. |
