<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> Our <a href="https://recorderchartsandpens.com/recorders">barton chart recorders</a> are known for their ability to measure and record pressure, differential pressure (DP), and temperature with accuracy and dependability. They are completely mechanical and run without the aid of outside utilities, making them portable or with inexpensive installation costs. A pen is used to write on paper, and it deflects in proportion to the signal. The outcome is a data graph or chart.