... resistance input.4.OCT/RS-485/4-20mA output.5.Power supply by 8-36VDC for module ... through RS485 interface, transmissiondistance up to 1000m Powerful FunctionsCurrent output: 4-20mA, one channel, can be used for ... flow/heat transmitterOCT output: two channels, can be used for flow /heat ... ,oil,chemicals,beverage&food processors etc. Ultrasonic Fuel Consumption Flow Meters