Abstract: A device is provided for monitoring a wash process inside a mechanical washing apparatus, comprising sensor means for measuring physical and/or mechanical parameters of the wash process and recording means for recording the measured parameters within the device. This device comprises means for conducting a washing liquor past the sensor means and means for determining a certain contact time between the washing liquor and the sensor means.

Abstract: The invention relates to a bicycle lock (1), comprising locking means (5,8) for locking a bicycle (10), and releasing means (6) for removing the locking. The releasing means (6) can be operated with a pass (2), which is provided with a valid operating code (3). For this purpose, the lock comprises reading means (15), preferably non-contact, by means of which the operating code (3) can be read out and compared with a code preprogrammed in the lock. In order to save energy consumption, the reading means are preferably provided with switching means, which are preferably automatically switched on when the pass is brought into a reading position. The invention further relates to a system for giving bicycles on loan, wherein each bicycle is provided with a lock according to the invention, and wherein issue and collection of the bicycles is managed with the aid of the issue and collection of passes (2).

Abstract: A device is provided for monitoring a wash process inside a mechanical washing apparatus, comprising sensor means for measuring physical and/or mechanical parameters of the wash process and recording means for recording the measured parameters within the device. This device comprises means for conducting a washing liquor past the sensor means and means for determining a certain contact time between the washing liquor and the sensor means.