| Pen type digital pH meter, all in one, pH electrode included, easy to use Data hold function for freezing the desired value. Supplied with pH 4.01, pH 6.86 and pH 9.18 buffers Power supply by 1.5 V battery LR44 x 4 PCs http://www.phkedida.com |
calibration of ph mete PH Meter CT-6021A
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