额定电压 Rating voltage : DC3.3~5V额定电流 Operating current : 25有水状态输出 Output voltage in water: 0.3V无水状态输出 Output voltage in air : 3.0V/4.5V液位检测精度 Liquid detection accuracy : ±1mm输出 Output signal:模拟 og signal防水等级 Waterproof level : IP68工作温度 Operating temperature