TDS Meter Tester Pen with LCD

Brand new 1.★Fast and Accurate Readings: Just turn it on, dip in liquid and read display, no need to work with color charts or test strips; Large digital display makes it easy to read. 2.★Automatic Calibration: No need any adjustment screwdrivers, just finish the calibration with Auto calibration button and included buffer powders. 3.★ATC Function: Automatic Temperature Compensation accounts for changes in temperature automatically; Full measurement range of TDS 0-999. 4.★Portable Design: Handheld pen style and compact carrying case makes it conveniently fits in your pocket or bag and goes anywhere. 5.★Wide Application: Ideal for home and laboratory pH testing applications, including drinking water, swimming pools, aquariums, hydroponics, etc.