Abstract: An ultrasonic consumption meter includes an ultrasonic transducer for emitting and receiving ultrasonic waves, a flow channel, an electronic circuit for operating the meter, and a housing for the ultrasonic transducer and the electronic circuit. The housing is locked in position relative to the flow channel by a locking mechanism.

Abstract: A method for communication between a meter device and a communication network in accordance with a radio protocol, the meter device including a meter device identification and the radio protocol including a reduced part of the meter device identification and a data field, wherein the method of communication involves transmitting a data telegram according to the protocol from the meter device, receiving the data telegram by the communication network, and identifying the meter device from a set of identification elements, including the reduced part of the meter device identification and at least one information element obtained from a data source external to the meter device. The invention furthermore relates to an identification computer device and a meter device adapted for operating according to the above mentioned radio protocol, and a radio protocol for communication between a meter device and a communication network in accordance with the above mentioned radio protocol.

Abstract: An ultrasonic flow meter is disclosed comprising at least one ultrasonic transducer, wherein the transducer comprises a piezoelectric disc, a nonconductive polymeric material and an electrically conductive layer between the piezoelectric disk and the nonconducting polymeric material.