... dyeing, electronic semiconductor, chemical, pharmaceutical, etcFeatures:1.High impedance preamplifier, strong ability of anti-interference 2. ... lower limit alarm, 2 separate 220VAC/3A relay output6.Automatic temperature compensation from 0~100°CTechnical ... ~+70°C;0~95% relative humidity, no condensing6.Relay: 2 relays; SPDT contactor, 3A 110/220VAC,3 ... KG Anjun ph indicator controller with High Quality