Scope This instrument was designed and manufactured in line with the standard GB / T259-88 "Petroleum products Determination of water-soluble acid and base". It can measure liquid petroleum products, additives, grease, paraffin, wax and waxy component water-soluble acid or water-soluble base. First, water soluble acid or alkali in the sample was extracted with distilled water or ethanol water solution, and then the extract was determined by pH indicator or indicator. Features 1, the instrument consists of two parts, simple structure, in full compliance with the requirements of GB / T 259 standard requirements. 2, can be independently controlled heating furnace, heating power continuously adjustable, heating control is extremely convenient. 3, the heating furnace using a heating plate glass braid, with a high heating efficiency, low energy consumption, no fire and so on. 4, test is convenient, easy to operate, accurate results. Technical Parameters 1 Power supply: AC220V ± 10%; 50Hz. 2 heating power: 100W ~ 1000W continuously adjustable. 3, pH meter: Range 0 ~ 14.00pH, accuracy ± 0.01pH. 4, sub-funnel: 250ml. 5, cylinder: 100 ml, 50 ml. 6, tube: F18 mm × 100 mm. 7, Erlenmeyer flask: 100 ml. 8, the ambient temperature: -10 ? ~ + 35 ?. 9, relative humidity: =85%. 10. Total power consumption: less than 1200W.