Abstract: A socket structure for mounting an ultrasonic gas flow measuring device with respect to a gas flow pipe which is capable of effectively preventing condensed moisture from being collected in a gap between a socket and a probe head received in the socket. The socket structure includes a pair of sockets each provided at a gas flow pipe to receive therein a probe head in such a manner that a gap may be defined between the socket and the probe head, and a moisture collection preventing construction provided at each of the sockets. The moisture collection preventing construction serves to prevent condensed moisture from being collected in the gap to form a bridge between the socket and the probe head and may be formed by a plurality of grooves formed on an inner surface of the socket which surrounds the probe head, thus allowing condensed moisture collected in the gap to escape therethrough to the gas flow pipe.

Abstract: A socket structure for mounting an ultrasonic gas flow measuring device with respect to a gas flow pipe which is capable of effectively preventing condensed moisture from being collected in a gap between a socket and a probe head received in the socket. The socket structure includes a pair of sockets each provided at a gas flow pipe to receive therein a probe head in such a manner that a gap may be defined between the socket and the probe head, and a moisture collection preventing construction provided at each of the sockets. The moisture collection preventing construction serves to prevent condensed moisture from being collected in the gap to form a bridge between the socket and the probe head and may be formed by a plurality of grooves formed on an inner surface of the socket which surrounds the probe head, thus allowing condensed moisture collected in the gap to escape therethrough to the gas flow pipe.

Abstract: An ultrasonic transmit-receive probe is disclosed which is capable of effectively protecting an internal structure of the probe against leaked steam so as to ensure stable and positive operation of the probe over a long period of time. The probe includes an enclosing tube arranged in a probe housing. The enclosing tube is sealedly connected at one end thereof to an oscillator housing receiving an oscillator therein to communicate therewith and sealedly fitted at the other end thereof on a plug received in the other end of the probe housing so as to outwardly project therefrom, thereby sealedly protecting the oscillator and plug against the atmosphere in the probe housing.

Abstract: An ultrasonic transreceiver is disclosed which is capable of substantially preventing the formation of a gas boundary layer between a piezoelectric transducer and a housing and the breakage of the transducer due to thermal stress and ensuring satisfied electrical connection in the transreceiver. The ultrasonic transreceiver includes a spring for downwardly forcing the piezoelectric transducer arranged in the housing against a bottom surface of the housing. The transreceiver may include a viscous or elastic member arranged between the housing and the piezoelectric transducer to prevent a gas boundary layer from being formed therebetween. Also, the transreceiver may include a coiled spring laterally arranged between the housing and the piezoelectric transducer to forcedly press them apart from each other and electrically connect them to each other.

Abstract: A gas flow rate measuring device which is capable of removing a probe from a probe socket for inspection and/or replacement at the same time that while gas is flowing through a pipe. The gas flow rate measuring device includes a gas seal mechanism sealedly arranged between the probe socket and a probe coupler. The gas seal mechanism is formed therein with a hollow passage sufficient to allow the probe and a probe support to be moved therein and serves to hermetically seal the probe socket when the probe is removed from the probe socket. The gas flow rate measuring device may also include a ring member fitted on the probe support in a manner to be interposed between the probe support and the probe socket, arranged to prevent the transmission of a roundabout ultrasonic wave.