LEICI pH meter PHB-4 0.1pH resolution Manual warming
SE
(0.00~14.00)pH-1400~1400mV
0.1 level, (-1400~1400) mV, (0.00~14.00) pH, manual warming, automatic identification of GB 4.00pH, 6.86pH, 9.18pH three pH standard buffer solutions, support custom pH buffer solution