Fluid dispensing device with a flow detector

A portable therapeutic fluid delivery device for delivering a therapeutic fluid into a body of a patient, the fluid delivery device comprising:

• a first part which comprises:
• a driving mechanism,
• a processor,
• a flow detector comprising two electronic components electrically coupled to the processor;
• and
• a second part which comprises:
• a reservoir,
• an exit port, and
• a delivery tube communicating between the reservoir and the exit port,
• wherein the first part and the second part are designed such that upon pairing of the first part with the second part, the two electronic components of the flow detector are thermally coupled to the delivery tube, and upon activation of a first one of the two electronic component to heat the delivery tube, the processor is configured to determine flow condition of the therapeutic fluid inside the delivery tube based on sensed temperature provided to the processor by a second one of the two electronic components.