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iPower 0.01 high accuracy pocket size portable pH tester/0.0-14.0 measuring range, water quality tester for household drinking water, swimming pools, aquariums. Specifications: 1. Measuring range: 0.00-14.00 pH 2. Resolution: 0.01 pH 3. Accuracy: 0.01 pH 4. Batteries: 2 X 1. 5V LR44 (included) 5. Automatic temperature compensation: 0-60℃ (32-140℉) 6. Dimensions: 6. 04 x 1. 13 x 0. 49 inches 7. Net weight: 1. 76 oz(50g) Tips: Be careful with the glass probe since it may be a little fragile when you use. Remember to gently wipe it with a clean, soft cloth when you are done before capping it again. iPower TDS & EC and temperature meter 3 in 1 professional TDS 0-9990ppm conductivity meter EC TDS and temperature test pen with 2% accuracy ideal water test meter for drinking water, aquariums, hydroponics, coffee, pool, etc. Specifications: TDS: 0 - 9990 ppm (parts per million) Conductivity: 0 - 9990 µs/cm Degrees Celsius: 0.1 - 80.0°C Fahrenheit: 32.0 - 176.0°F Accuracy: 2% F. S Net weight: 1.59 oz(45g) Size: 6.02 x 1.13 x 0.49 inches iPower 3 in 1 Soil Meter Specifications: pH range: 3.5-8 Ph (3.5-6.5 ACID, 7 NOR, 7-8 ALKALI) Moisture range: 1-10 (1-3 DRY, 4-7 NOR, 8-10 WET) Relative light: 0-2000 lux (0-200 LOW, 200-500LOW+, 500-1000 NOR 1000-2000 HIGH) Size: 2.36 x 11 x 2 inches Probe length: 7.1in Copper probe diameter: 4.8mm Alu probe diameter: 5.1mm Distance between probes: 1.2cm Package weight: 3.78 oz (107g) Instructions: Step 1: Switch moisture/pH/light position Step 2: Stick the probe into the soil about 2-4 inches Step 3: Adjust the position of the probe until the pointer on the dial swing slightly Step 4: After 10 minutes, Note moisture/pH/light level in the dial Step 5: Remove probe from soil and wipe clean after each use Important Tips: 1. Do not touch the stone or hard rock soil, if the soil is too hard and dry, easy to damage the probes. Copper and Aluminum itself does not belong to the hard material, so if the soil is too dry and hard to insert, you can use auxiliary agricultural tools drill hole and then insert. 2. Design for testing soil only. Cannot be used to test pure water or other liquid, electrolytic response index will be affected, can only be used to measure the soil. 3. Don't be inserted in the soil for a long time while using. Use cloth wipe the probe so that keep clean and dry and then use. 4. Don't touch fire and stay away from children.