Provides accurate and reliable test readings: 3-In-1 Digital TDS meter provides accurate readings for TDS (Total Dissolved Solids) EC (Electrical Conductivity) and temperature. Professional, Accurate, and Precise 3-in-1 TDS, EC, and Water Temperature Meter. The TDS meter has automatic temperature compensation in measurement mode. 9 minutes no operation, the meter will automatically shut down. Save power, extend battery life Multi-mode conversion: TDS EC meter instrument a total of 4 different modes, press the SHIFT key can be converted between different modes. Mode memory function, each boot mode is the default mode used before the shutdown Locks your reading making it easy to record: Large, easy to read LCD screen and data-hold function makes reading and recording a snap. "HOLD" automatic locking, "SHIFT" automatic conversion, 5 minutes Automatic locks.Press the SHIFT key while the value is locked to view the measurement results for the different modes. The measurement time is rapid, due to the exquisite type sensors, 5 seconds complete Pocket Size: TDS meter is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket! For today's market volume is the smallest, lightest portable. Reasonable design, pen electrode can be directly inserted into the water solution, measured it.Compact size that enable you to take anywhere Widely Use: Perfect for all water quality testing, water purification applications, waste water regulation, aqua culture,hydroponics, laboratory and scientific testing, pools, ecology testing, silver, water treatment and more Lock function: makes it easy to read and record, press HOLD button then remove from test solution. 4 Display modes: press SHIFT button: TDS - ppm & C, EC - s/cm & C, TDS - ppm & F, EC - s/cm & F. 5 minute Auto Shut Off feature, so battery 't run down. With Backlight Or Not: no Model Number: EC Meter Display Type: DIGITAL Function: TDS/EC/TEMP 3 in 1 Conductivity Measure Range: 0 - 9990 s/cm TDS Measure Range: 0 - 9990 ppm (parts per million) Degrees Celsius: 0.1 - 80.0C Fahrenheit: 32.0 - 176.0F Accuracy: 2% color: blue material: plastic Size: 15 * 3cm 1: Remove the electrode protective cap before use 2:Press the ON/OFF button, and immerse the meter into the solution. (The solution should not over the immersion line) 3: After the numerical display is steady, press the HOLD button and take it out of the solution for checking the result 4: Wipe clean the electrode after using, turn off the meter and replace the protective cap Package Contents: 1 pcs * TDS EC Meter Only the above package content, other products are not included. Note: Light 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.