Terra Aquatica pH Up 500ml

Calibration Envelopes Hanna Instruments pH 7.01 pH meters are misaligned to the correct measurement with the use and it is necessary to regulate the measurement by adjusting the meters to correct values with these solutions. It is recommended to clean the meters after use and calibrate them every month or two months depending on their use. Hanna solutions are made from established formulas and are standardized with a pHmeter calibrated with NIST standard calibration solutions. Careful handling and good cleaning (cleaning solution for the electrodes) is essential for a good measurement result.