... -20mA. 2:Voltage:0-5V. 3:Digital:RS485(ModBus RTU). engine capacitance fuel level sensor The key parts adopt advanced RF ... the transmitters have a self-calibration feature, users can get "zero", "range" automatic calibration by using two key, in order to ... measured datas are not effected by measured liquid temperature,specific gravity and shape of the container, the influence of pressure.4 ...