Abstract: A water entry alarm system has at least one harness to be worn about the body of an individual to be protected and carrying a transmitter for transmitting a predetermined signal and a water sensor for turning off the transmitter on detection of water. The harness has a strap for extending about the individual's waist, a first fastener unit at one end of the strap containing a power supply and a second fastener unit at the other end of the strap for releasable connection to the first fastener unit. The transmitter and water sensor are mounted in the second fastener unit, and are connected to the power supply when the first and second fastener units are connected, so that the signal from the transmitter is automatically turned off if the first fastener unit is disconnected from the second fastener unit.

Abstract: Each ultrasonic transducer in a plurality provides a particular signal having characteristics related to the heart rate of an associated fetus. Each particular signal is processed in an associated labor room monitor and modulated on a different carrier frequency for transmission on power lines in the hospital. At a remote location, a nurses station power unit is modular with nurses station monitors. The line signals are individually demodulated in an associated one of the nurses station monitors to provide an indication of heart rate. Alternatively, the transducer assemblies can be coupled to delivery room monitors to provide an indication of heart rate.The transducer assemblies are uniquely shielded to inhibit interference of spurious low frequency signals with the particular signals. The particular signals are partially detected in the transducer assemblies so that the assemblies can be used with both the labor room and delivery room monitors.