Product name: Water level sensor operating voltage: DC3-5v operating current: Less than 20masensor type: Analog detection area: 40mmx16mm production process: Fr4 double-sided hasl operating voltage: DC3-5voperating current: Less than 20ma sensor type: Analog detection area: 40mmx16mm production process: Fr4 double-sided hasl operating temperature: 10-30 degree c humidity: 10 percent -90 percent non-condensing.