| 摘要 |
A liquid monitoring device which floats in liquid such as swimming pools and the like includes a signal element able to indicate a property of liquid and arranged to float above the surface of the liquid, an elongate housing extending below the signal element and arranged so that it is below the surface of liquid when the device is floating therein, and a sensor arranged at an end region of the housing remote from the signal element and arranged to measure at least one property of the liquid, and a device to transmit information from the sensor to the signal element. |
