9 Software for locating holes or leaks in pipes, software for detecting flow in pipes, software for detecting flow characteristics and flow dynamics in pipes, software for monitoring flow in pipes, leak detection and testing apparatus, instruments and units, electronic leak detection and testing apparatus, instruments and units, flow detection and testing apparatus, instruments and units, electronic flow detection and testing apparatus, instruments and units, sensing apparatus, scientific, nautical, surveying, measuring and signaling apparatus and instruments, apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, discrete sealing elements containing means of detection or sensing thereof; discrete sealing elements containing magnetic, radio-active, fluorescent, piezoelectric, colored, luminescent, thermal luminescent, infra-red, ultra-violet, electromagnetic, temperature sensitive, chemical or biological labels, tags or markers, underground pipe locating apparatus, instruments and units, pipeline inspection tools for detecting defects, pipeline inspection tools incorporating ultrasonic apparatus