C-600 is a multifunctional water quality tester with 7 functions and one product that can be used multiple times. It can measure pH, conductivity, ORP, temperature (°C/°F), TDS and salinity within one meter. the measurement range is large and wide, and can measure fresh water salinity and sea salt. It is suitable for digital water quality monitor in home, swimming pool, drinking water and aquarium. Measurements are accurately displayed in a large, easy-to-read and clear LCD. Calibration Conductivity EC: Support 3-point calibration automatic identification (1413us 12.88ms and .8ms) through 3 calibration points (1413uS/cm 12.88mS/CM .8mS/CM) pH: 1 point (6.86) or 2 points (6.86 4.00 )) (6.86 9.18) or 3 points (6.86 4.00 9.18) can automatically identify the calibration solution Sea salt: the salinity of sea water is the ratio of total dissolved solids to the weight of sea salt in sea water, usually expressed in grams per kilogram of sea water. (Measurement range 10.1-200.0 ppt) The power consumption is 2.9 mA, and the power consumption is 0. the accuracy within 150ppt is relatively accurate, and the deviation higher than 160ppt is relatively large. Automatic shutdown: 5 minutes EC measurement range: 0 to 10000uS/cm 10.01-19.99ms 20.1-400mS/CM Product parameters: Product name: water quality testing pen Measurement range: PH/ORP/EC/TEMP/SALT/S.G/TDS Resolution: 1 uS/cm; 0.1 ms/cm; Accuracy: ±2% of reading TDS measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt Resolution: 1ppm; 0.1 point Accuracy: ±2% of reading Salinity measurement range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%) PH measurement range: 0.01-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH ORP Negative Potential ±1999MV S.G seawater specific 1.000-1.222 Operating environment: 0 to 60.0°C (32.0-140°F); relative humidity 100% TDS coefficient: 0.4 to 1.0 Temperature range: 0.1-60.0°C 32.0-140°F Temperature Accuracy: ±0.5°C Temperature Resolution: 0.1°C/°F Power Supply: 3 x 1.5V button batteries (included) Display size: 33 x 24mm Dimensions: 183 x 37 x 37mm (7.2 x 1.5 x 1.5 inch) Weight: 160 grams Material: ABS colour: green+white Package Contents: 1 x Water quality tester 1 x english manual Only the above package content, other products are not included. Note: Light reflection 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.