![Check Out The Depth Ray Tank Level Monitor](https://cole-pumper.imgix.net/https%3A%2F%2Fwww.pumper.com%2Fuploads%2Fimages%2F2014-02-27_12.31.13.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=48b127a3e7c762c6971085ecbd505218)
Several years ago, John Eldredge Sr., the owner of Eldredge Equipment Services, and his son, John Jr., were growing increasingly frustrated with the technology on the market for determining depth in tanks of their fleet of vacuum trucks. So the pair took matters into their own...