TDS meter: 3-in-1 TDS and Temperature Meter The 3-in-1 Professional TDS Meter is useful if you want to know how clean your water really is. It is a professional water test meter that fits in your pocket. This accurate meter is perfect for all water quality testing, water purification applications, waste water regulation, aquaculture, hydroponics, laboratory and scientific testing, pools & spas, water treatment, and more. A suitable soil environment is important for the healthy growth of plants. This means providing perfect soil conditions, adequate water, sunlight, and plenty of nutrients for your plants. The tester helps you understand your soil more clearly and care for your plants better. It will help you avoid some of the common mistakes such as over or under watering and planting in an area with insufficient lighting. It can also highlight potential issues with soil that is too alkaline or acidic. pH Meter: How to use? Step 1: Remove the protective cap Step 2: Clean the electrode in distilled water and dry it Step 3: Turn the meter on by pressing the ON/OFF key Step 4: Immerse the pH meter electrode in the solution to be tested Step 5: Stir gently and wait for the display to stabilize Step 6: After finishing, clean the electrode in distilled water and turn the meter off by pressing the ON/OFF key Product Features: Measure Range: 0.00 - 14.00 pH Resolution: 0.01 pH Accuracy: 0.05 pH Calibration: Two Points Automatic Calibration Button Power Supply: 2 x 1.5V LR44 Button Batteries Weight: 50 g Degrees Celsius: 0.1-80.0 Conductivity: 0-9990 s/cm TDS: 0-9990 ppm Accuracy: 2% Battery: 1 x 3V CR2032 (included) Size: 154 x 30 x 14 mm Material: ABS Color: Yellow + Blue + Green Package Contents: 1 x pH Meter (yellow) 1 x TDS Meter (blue) 1 x Soil Tester Kit (green) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.