MD-FTS210 Based on the thermal principle, the sealed probe contains two resistors, one of which is not heated as the detection resistance, the other is not heated as the reference resistance, when the medium flows, the heat on the heating resistance is taken away, the resistance value is changed, the two resistance difference value is used as the basis of judging the flow rate. No moving parts, maintenance free, easy to install, one model suitable for a variety of pipe diameter requirements, switching volume continuously adjustable, very low pressure loss, compact structure, OLED display flow trend and switching status, integrated temperature measurement function, supporting temperature alarm and remote measurement.