The dew point indirect evaporative cooling technology, its driving potential is the difference of dry-bulb temperature and dew point temperature, in theory, the air can be lowed to below wet-bulb temperature and approach dew point temperature, this technology can be very cool range.

According to W D Bigelow's sterilization theory, a programmable DAQ system based on PC (Personal Computer) open loop was built to provide continuous measurement of cold spot temperature and accumulate its F value during can sterilization process.