About this item

• High Stability: These premium buffer powders maintain accurate pH values of 6.86, 4.00, and 9.18, even after long-term storage, saving you from repeated purchases for pH calibration
• PH Meter: Full measurement range of pH 0 - 14, reliable and quick readings
• High Accuracy: These high-purity buffer powders ensure precise pH calibration with ±0.01 pH accuracy at 25°C/77°F; They keep your pH testers sharp and reliable for consistent results
• 3-in-1 TDS Meter: Range of Measurement from 0 to 9990ppm and 0 to 9990µs/cm; Precision of ± 2%, Temperature Range from 0.1 to 80.0°C and 32.0 to 176.0°F; Important: Not suitable for testing sea water
• Application: Great for all home and laboratory TDS & pH testing applications including aquariums, swimming pools