Is the nitrogen heater a gas?

The nitrogen heater is not a gas, but an electric heating device.

The nitrogen heater is an electric heating device specially designed for heating nitrogen. It heats the fluid by forced convection, using stainless steel electric heating tubes as heating elements. These heating tubes are installed in the inner cavity of the heater, and the inner cavity is designed with baffles or guide plates to guide the nitrogen flow path, increase the contact time between the gas and the heating element, and ensure uniform heating of the nitrogen.