Fullerton, Calif.-based Good Water Warehouse introduces the OAKTON Instruments’ new Waterproof Pocket Sized TDSTestr+ and ECTestr+ series with 1 percent full scale accuracy, built-in sample cup sensor assembly that can also be dipped into samples, and automatic shut off to conserve batteries. These are the only pocket sized TDS and conductivity instruments that float, are waterproof and dust proof, and have replaceable sensor assemblies. Six models, each with its own measurement range, are offered.