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