HMD (Hot Metal Detector) is a photoelectric
sensor of the radiation photodetection type
of the heat material that detects presence,
and detects the position according to the
receiving light of the infrared rays (heat
ray) radiated from the heat material (scorching
object). The transmitter is unnecessary.
It is a sensor that can be used under a severe
use condition that heat, steam, and dust,
etc. disperse like the ironworks and the heavy
industry site, etc.. It is easy to handle
this sensor by a small size, unnecessary cooling
and using a fiber optic cable as receiver.