GroStar pH calibration kit (pH 4/7, 8 oz. each)

GroStar by Apera pH calibration kit (pH 4/7, 8 oz. each). Kit includes:. (1) 8 oz. pH 4.0 calibration solution. (1) 8 oz. pH 7.0 calibration solution. • pH measuring equipment must be cleaned and calibrated regularly to ensure accurate readings. • High accuracy (0. 01 pH): standardized against NIST Certified pH references within 0. 01 pH at 25 ̊C (77 ̊F). ideal for the calibration of all pH meters. • Color-coded, double-sealed, 1-year shelf life. • Expiration date and temperature/ph reference chart provided for reference. • Non-hazardous product. • Calibration Solution should be stored in a cool place out of direct sun and heat.