PH Meter Lutron 221 PH Meter, ATS, Two Display

Model : PH-221
* 0 to 14.00 pH, 1, 999 mV.
* LCD show both pH and the temperature.
* ATC or manual TEMP. compensation.
* Auto calibration for pH 4, pH 7 and pH 10.
* Optional pH electrode and the ATC probe.
* 1600 Data logger point.
* RS232 computer interface.
* DC 9V battery ( 006P) or DC 9V adapter in.