Fluid delivery heaters provide precise, reliable and responsive heating for fluid delivery systems in medical, analytical, water purification and general process applications. Fluid heater unique designs place the heating element and sensor directly in contact with the perimeter of the tubing to produce efficient temperature control of the tube contents and eliminates the need for heated reservoir systems in many applications. The special design provides a heated fluid and drug delivery system solution with long operational life which improves system reliability while reducing equipment down time.