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yeacher Portable 5-in-1 Water Quality Tester: PH, EC, TDS, Salinity, and Temperature with Backlight, Auto-Calibration, and Temperature Compensation for Aquariums, Labs, and Agriculture.

<ul><li>Easy to use, high accurancy.</li><li>EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms)</li><li>Quick and easy installation and operation.</li><li>Built-in 3 calibration points (1413uS/cm 12.88ms /cm 111.8ms /cm)</li><li>PH:1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution.</li></ul>

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Widely used in aquarium, fishpond, pharmaceutical research, agriculture, laboratory, water environment, quality control and other fields. Features: Easy to use, high accurancy. Quick and easy installation and operation. EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms) Built-in 3 calibration points (1413uS/cm 12.88ms /cm 111.8ms /cm) PH:1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution. This is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket. Has automatic temperature compensation. 5 minutes no operation, the meter will automatically shut down. Save power, extend battery life. (Battery is not included) Specifications: Type: with backlight, without backlight (optional) Material: ABS EC:  Measuring range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms /cm Resolution: 1uS/cm; 0.1 mS/cm; Accuracy: ±2% of the reading TDS:  Measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPT Resolution: 1ppm; 0.1 PPT Accuracy: ±2% of the reading Salinity:  Resolution: 0.01% Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%) PH: Measuring range: 0.01-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH Operating environment: 0 to 60.0℃ (32.0-140℉); RH 100% TDS factor: 0.4 to 1.0 Temperature range: 0.1-60.0℃ 32.0-140℉ Temperature accuracy: ±0.5℃ Temperature resolution: 0.1℃/℉ Battery: 3 * LR44, 1.5V, 160mAh Waterproof rating: IP67 Display size: 33*24mm Item size: 180 * 37mm / 7.1 * 1.5in Item weight: 86g / 3.0ounce Package size: 183 * 37 * 37mm / 7.2 * 1.5 * 1.5in Package weight: 100g / 3.5ounce Packing List: 1 * Water Quality Monitor Tester 3 * PH BufferPowders 1 * PH TestPaper