pH Meter Tester: - No calibration needed for new purchased item, just immerse the electrode and wait for about 30~60 seconds to get the accuracy readings. - Use the 6.86 pH buffer powder for calibration after a long time /frequently using or when ultra accuracy is needed. Specifications: - Measuring range: 0.0 ~ 14.0 PH - Resolution: ± 0.01 PH - Accuracy: ± 0.05 pH (20°C/ 68°F) - Batteries: 2 x 1.5V batteries (included) - Automatic temperature compensation: 0~50°C /122°F Dimensions: 5.85 x 1.28 x 0.78 inch Weight: 1.80oz /51g Lifetime: Approx. 700 hours. Package includes: 1 x pH Meter, 2 x 1.5V LR44 button batteries (built-in), 3 x Calibration packets, 1 x Carrying case, 1 x User manual. The PURAtest TDS Meter is a professional level water test meter that fits in your pocket! TDS testing is a great tool for drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, and more. A TDS meter typically displays the TDS in parts per million (PPM). For example, a TDS reading of 1 ppm would indicate there is 1 milligram of dissolved solids in each kilogram of water and 0 ppm being pure H2O. A TDS Meter indicates the Total Dissolved Solids (TDS) of a solution, i.e. the concentration of dissolved solids in it. Since dissolved ionized solids such as salts and minerals increase the conductivity of a solution, a TDS meter measures the conductivity of the solution and estimates the TDS from that. - Hold Function: Saves measurements for convenient reading and recording. - Auto Shut-Off Function: Meter turns off after 8 minutes of non-use to conserve batteries. - Dual range: Measures from 0-999ppm, with a resolution 1ppm, from 1000 to 9990ppm. - The resolution is 10 ppm, indicated by drinking *10 symbol. - Factory calibrated. - Range: 0-9990ppm. - Accuracy: +/-2%. - Battery: 2*1.5V(AG 13 button cell). - Size: 6.1" x 1.2" x 1" in. - Weight: 3 oz.

• Includes 1 pH Meter and 1 TDS Meter. Great for checking your tap water quality, or knowing when to change a filter.
• pH Meter features Auto Calibration (We recommend using the included pH Buffer Powders to easily recalibrate)
• pH meter has a range of 0.00 to 14.00 pH, with a 0.01 pH resolution and ±0
• TDS Meter is Factory Calibrated and features a Data Hold Function and Automatic Shut-Off
• TDS Meter Measurement range of 0-9990 ppm and ±2% highly accurate and quick readings.

Includes 1 pH Meter and 1 TDS Meter. Great for checking your tap water quality, or knowing when to change a filter.Unido Box