These convenient tank level indicators are ideal for storage tanks and transportable containers. They are easy to operate and offer a closed system for containers, which are transported frequently. A liquid level reading is taken by slowly pulling the tape out of the housing. When the liquid level point is reached, the tape locks-in at the position of the internal float. The level measurement is then read directly off the tape measure. After a reading is taken, the tape is securely stored in the housing. Units are available up to 60″ long in all Stainless Steel, stainless and Buna or Polypropylene. All units are 2″ NPT mounted with a 2″ diameter float.