ROOYLE PH Meter and TDS Meter Combo Digital pH Tester and TDS Meter with ±0.01 pH and ±2 percent ppm Accuracy 0.00-14.00 ph and 0-9990 ppm Measurement Range Hydroponics Digital Water Quality Tester

PH METERMeasurement range: 0.00- 14.00 pHAccuracy: ±0.01 pHResolution: 0.01 pHPower Supply: 2*1.5V (LR44 Button cells) (Included)Operating Temperature: 0°F - 140°FSize: 6.10”×1.22”×0.70”Net Weight:1.76ozFunctions:Automatic Temperature Compensation (ATC)One button (CAL) calibrationAutomatic shut off after 5 minutes inactiveCalibration Step:a. Turn on PH meter and clean the electrode in distilled water.b. Dissolve PH buffer powder in 250ml of distilled water, and immersing the electrode in the pH 6.86 standard solution.c. Pressing ”CAL” button until the reading flashing, wait the reading equal to the standard buffer solutiond. Repeat the above steps with pH 4.01 calibration solution ( For testing acidic liquid) or with pH 9.18 calibration solution ( For testing alkaline liquid) e. Clean electrode with distilled water and dry it.- Note 1: Since the H+ is Not uniform distribution in liquid ( The pH is difference in liquid's diffrent depth), please kindly slightly shake the testing sample before testing. - Note 2: Since the function of that automatic distinguish the calibration solution is only for pH 6.86, pH4.01 and pH 9.18, please kindly make the pH buffer powder in 250ml distilled water strictly. TDS METERMeasurement range: 0 - 9 999ppm (?999ppm Display×10)Accuracy: ±2%Power Supply: 2*1.5V ( LR44 Button cells) (Included)Operating Temperature: 32 - 122 °FSize: 5.57”×0.98”×0.55”Net Weight: 1.94ozFunctions:Automatic Temperature Compensation (ATC)One button (HOLD) lock the readingAutomatic shut off after 10minutes inactive- Note 1: TDS meter had been calibrated in producing- Note 2: The TDS meter doesn’t suit for testing sea water. PACKAGE INCLUDES:1×PH meter1×TDS meter3× PH buffer powders2×User manual