The accuracy of Honeywell Truline chart recorder is improved by accepting directly connected process signals, which enable them to process data and construct the chart under real-world environmental conditions, avoiding the possibility of paper expansion due to temperature and humidity. The chart image is produced by the chart recorders using a single, dual, or "hot-stylus" type pen. These chart recorders' straightforward design makes them simple to use, even for unskilled operators, and their modular design makes it