Lutron PH-220 Pen PH Meter, Separate Probe

\nPEN PH METER\nModel : PH-220\n* Separate pH electrode, easy for general purpose and remote measurements.\n* 0 to 14.00 pH.\n* Auto calibration for pH 4, pH 7 or pH 10.\n* Temp. adjustment is not necessary.\n* IP-65 water proof.\n* Pen type, easy carry out.\n* Complete set with separate pH electrode ( PE-11 ) and pH 4, pH 7 standard solutions.\n* Built-in reverse display button.\n* DC 1.5V battery ( UM-4, AA ) x 4, long life.\n