... compensation 4. Anjun ph indicator controller with High QualityApplicationIndustrial waste water,pure water, circulating water ... , electronic semiconductor, chemical, pharmaceutical, etcFeatures:1.High impedance preamplifier, strong ability of anti-interference 2 ... 0~100°CTechnical specifications:1.Indicator: LCD display with back light2.Measuring range: pH:0 ... ph indicator controller with High Quality