SELF-CONTAINED AND WIRELESS MONITORING DEVICE FOR A WASHING MACHINE

摘要

The invention relates to a self-contained and wireless monitoring device (10) for use in a washing machine (1) to indicate shortage of detergent in said washing machine. The monitoring device comprises a sensor (13) arranged to monitor detergent concentration in washing liquid (5) of said washing machine and to provide an alarm signal (A) when said monitored detergent concentration is below a target value. The monitoring device is capable of floating in said washing liquid and comprises signaling means (11) for indicating said shortage of detergent in response to said alarm signal. The invention further relates to a package containing such a monitoring device and a method for indicating shortage of detergent.