FEDREL make Data Logger interfaces to pulse output flow meters. These units can log forward, reverse flow and can log tamper inputs. The calculated flow rate as well as forward and reverse total flow is recorded in internal memory for retrieval later. Data Logger can also power and log data from 4-20Ma output pressure transmitters. Data logger generates the necessary voltages needed for secure operations of these 2 wire pressure transmitters. An internal high resolutions ADC converts these pressure information into digital values which can be displayed and stored. Data Logger also has provision to connect to external devices using the RS-485 communications interface. MODBUS protocol is implemented on this interface.