Quick view Lakewood Instruments Lakewood Instruments 1240475 Model 1520/30e pH/ORP Water Treatment Controller MSRP: $1,742.51 The Model 1520/30e uses the latest in microprocessor capability, giving the user a high level of application flexibility in pH or ORP control. The user in the field can configure this controller to... MSRP: $1,742.51 Add to Cart The item has been added Add to Wish list Compare