"pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened."
3744 10th St NE, Washington DC
Capital City Organics
Come visit us at CAPITAL CITY ORGANICS in Brookland, DC
11am-7pm Mon-Sat ; 11am-5pm Sundays ***Prices Are Subject To Change***