Level sensors and transmitters are one of the important field instruments in the process industry. After suffering a decline in 2008 and 2009, the level sensors and transmitters market has bounced back to a growth phase. The global level sensors market is estimated to be $4,048.7 million in 2011 and is forecast to touch $5,319.5 million by 2018. The transition toward non-contact or electronic type of measurement from contact or mechanical type of measurements is continuing. Therefore, non-contact level sensors are the predominant technology in the total level sensors and transmitters market.