... °CTechnical specifications:1.Indicator: LCD display with back light2.Measuring range: pH:0.00~14.00pH; ORP:-1999~+1999mV3.Signal output ... ~+60degree;0~95% relative humidity, no condensing5.Storage: -20~+70°C;0~95% relative humidity, no condensing6.Relay: 2 relays; SPDT ... 110/220VAC,3@30VDC ohm7.Temperature compensation: Pt1000RTD, Automatic compensation range: 0~100°C8.Accuracy: 0.25% 9.Stability: 0.1 ...