LMI B111 SERIES METERING PUMP LMI "B-Series" metering pumps are one of the most technologically advanced chemical metering pump in the LMI line up. They offer versatility combined with high output and programmable features. These pumps are available for applications up to 150 psi with capacities between .001 and 7.0 GPH. Single or dual manual control options with pulse input or 4-20 mA input are available. These pumps are covered by a 3-Year warranty.