about D116 D116 Series Ultrasonic Flowmeter is a state-of-the-art iniversal transit-time flowmeter designed using FPGA chip and low-voltage broadband pulse transmission. Comparing with other traditional flowmeter or ultrasonic flowmeter,Website:http://www.pflowmeter.com, it has distinctive features such as high precision, high reliability, high capability and low cost, the flowmeter features other advantages: TVT technology designed. Less hardware components, low voltage broadband pulse transmission, low consumption power. Clear, user-friendly menu selections make flowmeter simple and convenient to use.Daily, monthly and yearly totalized flowParallel operation of positive, negative and net flow totalizes with scale factor (span) and 7 digit display, while the output of totalize pulse and frequency output are transmitted via relay and open collector.