Product Highlights Three levels of password protection Math functions for flow & round horizontal tanks 32-point linearization, square root or programmable exponent Multi-pump alternation control Rate displayed as units per second, minute, hour, or day Total, grand total or non-resettable grand total Two or four relays & isolated 4 to 20 mA output options External 4-relay & digital I/O expansion modules RS-232, RS-422/485 serial communication options