A thermal type flow sensor for measuring a flow rate of a fluid, including - a sensor element having a bridge circuit being formed on a semiconductor substrate comprising a first series circuit formed with a heat resistive element and a first temperature resistive element, a second series circuit comprising second temperature sensitive resistive elements (9, 10), wherein the temperature resistive elements (8, 9, 10) have a temperature dependency by changing the resistance according to the temperature, wherein the second circuit further comprises an adjustment resistor having a temperature dependency by changing the resistance according to the temperature, wherein the adjustment resistor is arranged between the temperature sensitive resistive element and the temperature sensitive resistive element, and wherein the sensor element is formed on a semiconductor substrate and wherein the first series circuit is arranged in parallel to the second series circuit to form said bridge circuit on the semiconductor substrate, and - a driver circuit comprising buffers (50, 51) for sensing the voltage across the adjustment resistor, a multi-stage series resistor, a switch with a plurality of switching elements, a differential amplifier circuit configured to carry out feedback control on a current which flows through said bridge circuit via a transistor, and a switch control circuit, wherein the switch is configured to adjust a voltage divided ratio of the multi-stage series resistor, and wherein the switch control circuit is configured to transmit an electrical signal to the switch to be controlled, wherein a switching element of the switch is selected to adjust an intermediate voltage across the adjustment resistor by the voltage divided ratio of the multi-stage series resistor, wherein the driver circuit is configured to perform a balance adjustment for said bridge circuit. - a sensor element having a bridge circuit being formed on a semiconductor substrate comprising a first series circuit formed with a heat resistive element and a first temperature resistive element, a second series circuit comprising second temperature sensitive resistive elements (9, 10), wherein the temperature resistive elements (8, 9, 10) have a temperature dependency by changing the resistance according to the temperature, wherein the second circuit further comprises an adjustment resistor having a temperature dependency by changing the resistance according to the temperature, wherein the adjustment resistor is arranged between the temperature sensitive resistive element and the temperature sensitive resistive element, and wherein the sensor element is formed on a semiconductor substrate and wherein the first series circuit is arranged in parallel to the second series circuit to form said bridge circuit on the semiconductor substrate, and - a driver circuit comprising buffers (50, 51) for sensing the voltage across the adjustment resistor, a multi-stage series resistor, a switch with a plurality of switching elements, a differential amplifier circuit configured to carry out feedback control on a current which flows through said bridge circuit via a transistor, and a switch control circuit, wherein the switch is configured to adjust a voltage divided ratio of the multi-stage series resistor, and wherein the switch control circuit is configured to transmit an electrical signal to the switch to be controlled, wherein a switching element of the switch is selected to adjust an intermediate voltage across the adjustment resistor by the voltage divided ratio of the multi-stage series resistor, wherein the driver circuit is configured to perform a balance adjustment for said bridge circuit.