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Main outputs of Ultrasonic Flow Meters



As quick development of electronical technology,ultrasonic flow meters have been quickly developed and in order to meet the different industry communication request, many outputs and ports are pre-installed, and main outputs of ultrasonic flow meters are listed as below:


1. RS232 port. RS232 port is widely for instruments,also including ultrasonic flow meters. The port is usally 9-pin or 9-hole.By RS232 port,ultrasonic flow meters can be connected to computer,and data can be stored to PC. It usually need to set serial communication port in order to successful communication.


2.RS485 port. RS232 port has a very short communication distance,about several meters, and it can't meet the long distance communication. Thus RS485 will be a better choice as it can support tens to thousand meters distance communication. By RS485,some communicaton protocol can be used, for example, MODBUS protocol,M-BUS protocol.


3.Analog output: Analog output is mainly 4-20mA current loop output. The current loop outout has two ways: one is self-powered way, which doesn't need external power to the loop;the other is loop-powered way,which need external to the current loop.Our ultrasonic flow meter can suppor 0-20mA current output and the curent output mode can be set as request.


4.OCT(Open Collect Transistor Output) pulse output. The output is widely used and in our ultrasonic flow meters,the output can be set,including pulse width,output items,etc. The OCT output has istolate way and un-isolated way.


5.Relay output. Relay output is used to control switch ON/OFF.


6.USB way: as computer technology development, USB port is widely used and has been standard configuration.If instrument has no USB port, it can be use Rs232-USB converter.


Other outputs, e.g.blueteeth,infrared,etc way are available for industry communication. Users should select the proper output way.Sometimes, not the newest technology is the best.