Quick view LMI LMI DC4000 Liquitron Series Conductivity Controller For Cooling Towers & Steam Boilers MSRP: $2,649.41 LMI DC4000 Liquitron Conductivity Cooling Tower or Steam Boiler Controller The LMI DC4000 Liquitron series conductivity controller is a microprocessor based cooling tower or steam boiler... MSRP: $2,649.41 Quick Add Add to Wish list