pH Calibration Solution 4.00+7.00, 250 ml (8.4 fl.oz) Each: pH 4.00 Buffer, pH 7.00 Buffer, pH Meter Buffer Calibration Solution with 2 * 30ml Container for pH Tester, pH Pen, pH Probe

Package contents: 1*250ml pH4.00 calibration solution; 1*250ml pH7.00 calibration solution; 2*30ml transparent measuring cups with scale

pH4.00+7.00 Calibration Solution: large-capacity packaging, suitable for use with all pH meters. The package is equipped with a transparent measuring cup with scale, so that users can accurately grasp the amount of calibration solution (20ml) and better distinguish colors during use, avoiding unnecessary waste and greatly reducing the cost of maintaining the tester. The accuracy of the pH tester calibration solution is up to ±0.02 pH

Calibration Method: For EZTOCH pH calibration solution 7.00, please follow the steps below: Place the pH probe in the 7.0 calibration solution, press and hold the CAL button for 5 seconds, then release the button and wait for 7.0 to flash 3 times to complete the pH 7.0 calibration. The steps for pH4.0 are the same as those for pH7.0 (Please refer to the manual for the calibration steps of other brands of pH meters)

Easy to Use: It is ready to use after opening the lid, without the tedious dissolution process, which improves the efficiency of maintaining the tester. EZTOCH pH calibration buffer is not only suitable for all brands of pH testers, but also for all pH pens and pH meters, making it the first choice for various calibration needs

Note: EZTOCH pH tester calibration solution for water is valid for 2 years. It can be reused after opening and sealed and stored at low temperature. The used pH buffer calibration solution cannot be poured back into the bottle to avoid contamination; Please note: Do not let children accidentally swallow the liquid in the bottle, please keep it out of reach of children

pH Calibration Solution 4.00+7.00, 250 ml (8.4 fl.oz) Each: pH 4.00 Buffer, pH 7.00 Buffer, pH Meter Buffer Calibration Solution with 2 * 30ml Container for pH Tester, pH Pen, pH Probe