System comprising a heater device attached to an instrument body for heating liquefied gas in liquefied gas-using equipment that promotes atomization of liquefied gas at low temperatures by heating liquefied gas flowing through a gas flow path, the system further comprising: a liquefied gas introduction pipe, a gas intake pipe to supply liquefied gas to the instrument body, a device housing having a hollow portion, an inner end adjacent the instrument body and a partition wall extending axially from an outer end of the device housing towards the inner end, the hollow portion having an annular inner hollow portion and an annular outer hollow portion formed concentrically to each other by the partition wall and wherein the inner and outer hollow portions are fluidically connected by a hollow radial annular portion along the inner end; and a heater located within the partition wall of the device housing for heating the liquefied gas; wherein the gas intake pipe projects axially from the device housing inner end and protrudes through an outer periphery of the instrument body such that a gas intake opening of the gas intake pipe is located within the device housing; and wherein the device housing hollow portion forms a serpentine liquefied gas flow path from the gas introduction pipe to the gas intake opening, the gas intake pipe defining a center axis of the heater device with the inner hollow portion arranged concentrically about the gas intake pipe and the outer hollow portion arranged centrically about the inner hollow portion so that the liquefied gas flows axially within the outer hollow portion along the partition wall toward the inner end, radially inward towards the inner hollow portion then axially up along the partition wall within the inner hollow portion where it then enters the gas intake opening to be introduced into the instrument body from the gas intake pipe. a liquefied gas introduction pipe, a gas intake pipe to supply liquefied gas to the instrument body, a device housing having a hollow portion, an inner end adjacent the instrument body and a partition wall extending axially from an outer end of the device housing towards the inner end, the hollow portion having an annular inner hollow portion and an annular outer hollow portion formed concentrically to each other by the partition wall and wherein the inner and outer hollow portions are fluidically connected by a hollow radial annular portion along the inner end; and a heater located within the partition wall of the device housing for heating the liquefied gas; wherein the gas intake pipe projects axially from the device housing inner end and protrudes through an outer periphery of the instrument body such that a gas intake opening of the gas intake pipe is located within the device housing; and wherein the device housing hollow portion forms a serpentine liquefied gas flow path from the gas introduction pipe to the gas intake opening, the gas intake pipe defining a center axis of the heater device with the inner hollow portion arranged concentrically about the gas intake pipe and the outer hollow portion arranged centrically about the inner hollow portion so that the liquefied gas flows axially within the outer hollow portion along the partition wall toward the inner end, radially inward towards the inner hollow portion then axially up along the partition wall within the inner hollow portion where it then enters the gas intake opening to be introduced into the instrument body from the gas intake pipe.