非常易于使用，适合pH 7 and pH 10。打开包然后插入仪器进行校准测量。可用于pH /温度袖珍仪（B01410WA）和pHep电子pH值测试仪（B01138WA）校准。5个/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.
