Hm Digital 2-in-1 Aquapro Tester Ap-2 Ec And Temperature With Automatic Calibration An Measures electrical conductivity (EC) and temperature. Automatic Temperature Compensation (ATC) Water-resistant housing Measurement Range:0-9999 µS Digital Calibration (push button), Auto-off function, data-hold function and low-battery indicator. For HM Digital introduces its new AquaPro series, a line of handheld EC meters with a sleek design that's perfect for today's modern kitchen. The AquaPro digital water testers are the next generation for today's tech-savvy and health-conscience consumer. Display:large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated:The AquaPro is calibrated with a 700 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver. EC Range:0-9999 µS (µS/cm) Temperature Range:0-80℃;32-176℉ Resolution:1 µS; Temp. resolution is 0.1℃ Accuracy:+/- 2% Calibration:Digital calibration by push button. Housing:Water-resistant Power source:1 x 3V button cell (model CR2032) (not included in delivery) To convert µS (micro-Siemens) to mS (milli-Siemens):divide by 1000. 1000 µS equals 1 mS EC equals Electrical Conductivity Tips:The product may be updated constantly, the label words on the product are random, Cannot be chosen the specific words. The actual product may have slight differences or color differences. Colour:White Material:Plastic Package Contents: 1 * Water Quality Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.