GuDoQi 3 in 1 Water Quality Tester Professional TDS EC Meter Water Hardness Purity Temperature Tester for Household Drinking Water Hydroponics Aquariums Swimming Pools

Note: 1. Press "SHIFT" once for TDS & EC transformations 2. Press ''HOLD'' button for maintaining reading 3. Press "SHIFT" twice for " C / F" transformations 4. The EC unit of this product is ?s / cm. The range of EC measurements is 0-9990 us / cm(1 ms / cm = 1000 us / cm) 5. The TDS measurement standard is as follows: TDS 0 ~ 70 ppm (equivalent to 0 ~ 4 dH) indicates very pure water; Very soft water TDS 70 ~ 150 ppm (equivalent to 4 ~ 8 dH) indicates high purity water; Soft water TDS 150 ~ 250 ppm (equivalent to 8 ~ 15 dH) indicates water of general purity TDS 250 ~ 320 ppm (equivalent to 15 ~ 30 dH) indicates deposit water; Hard water TDS 320 ~ 420ppm (equivalent to 30 ~ 40 dH) indicates bad taste water; Very hard water TDS> 600ppm the water is not drinkable 5. TDS pen can not be used to measure high temperature water such as hot water 6. Please do not leave the liquid above 0.8 inch above the tester to avoid damaging the printed circuit board. And do not turn the tester immediately if water is present to prevent water from entering the tester 7. Keep the electrode clean. Do not store the meter at high temperatures or under direct sunlight Specifications: Measurement Range: Conductivity: 0 -- 9990us/cm TDS:0-9990ppm Degrees Celsius: 0-80C ( 32 F - 176F) Accuracy: 2% Size: 154*30*14 mm This product requires a 3V CR2032 button battery(battery is included) Item Material: Plastic Shell Case Material: Synthetic Leather Color: White Package Includes: 1 x Water Quality Tester 1 x User Manual 1 x Carrying Bag 1 x 3V CR2032 button battery