... dyeing, electronic semiconductor, chemical, pharmaceutical, etcFeatures:1.High impedance preamplifier, strong ability of anti-interference 2. ... 00pH; ORP:-1999~+1999mV3.Signal output: 4.00~20.00mA4.Operation: -10~+60degree;0~95% relative ... humidity, no condensing5.Storage: -20~+70°C;0~95% relative humidity, no condensing6.Relay ... KG Anjun ph indicator controller with High Quality