Air and gas flow velocity and temperature sensor probe

An air velocity sensor assembly adapted to measure air and gas flow velocity and temperature comprising:

• a probe tip housing having an opening therein;
• a bridge circuit assembly disposed within the probe tip housing and including a bridge circuit coupled to an operational amplifier and a power output amplifier, the bridge circuit including a first leg with a heated velocity sensor and a first reference resistor, the velocity sensor configured to operate within a predefined overheat temperature range which is above an ambient temperature, the bridge circuit having a second leg comprised of reference resistors and a digitally controlled resistive element disposed within the probe tip housing and adapted to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range, the operational amplifier applying a DC voltage to enable the velocity sensor to be heated to a target temperature within the overheat temperature range;
• a gas flow temperature sensor disposed within the probe tip housing for measuring the temperature of the gas or air flow to be measured;
• an analog to digital converter disposed within the probe tip housing and coupled to an output of the temperature sensor and to an output of the bridge circuit assembly;
• and
• an extension member having a proximal and a distal end, the extension member having an electrical coupling member disposed therein for coupling the probe tip housing located at the extension member proximal end to an electrical connector at the distal end of the extension member.