Differences Between Halogen and Infrared Lamp Heating

Halogen and infrared lamps are the two main heat sources for rapid-drying moisture analyzers; halogen has gradually replaced infrared thanks to superior heating performance and stability. VicoMeter explores their differences:

1. Comparative advantages of halogen lamps over infrared lamps:
1) Longer service life and greater heat output.
2) Halogen heating tubes heat the sample more uniformly.
3) Inert gas content benefits lamp life and performance.

2. Main differences between halogen and infrared lamps:
The halogen envelope is filled with halogen gas (iodine or bromine): heated tungsten evaporates, combines with halogen near the cool wall into tungsten halide, then decomposes back at the filament, redepositing tungsten. This cycle extends filament life nearly fourfold over infrared and permits higher temperatures—greater brightness, color temperature, and efficiency. The annular design heats samples uniformly without alteration.

3. Characteristics of infrared lamp heating:
Infrared lamps focus heat on one spot, easily scorching the sample center and skewing readings.