PH METER, ATC, two displays
Model : PH-221
* 0 to 14.00 pH, 1,999 mV.
* LCD shows 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/USB computer interface.
* DC 9V battery ( 006P ) or DC 9V adapter in.