非常易于使用，適合pH 7 and pH 10。打開包然后插入儀器進行校準測量。可用于pH /溫度袖珍儀（B01410WA）和pHep電子pH值測試儀（B01138WA）校準。5個/包
Easy-to-use 20 ml packets of each solution for pH 4 and pH 7. Open the packet and dip the meter in to calibrate. Can be used for both the pH/Temperature Pocket Meter （B01410WA） and the pHep Electronic pH Tester （B01138WA）. Five packets of each.
