Honeywell's Truline recorder is a one to four-channel, microprocessor-based, circular chart recorder. Its "one-pen" stylus printhead produces up to four analog traces and prints alphanumeric chart data on a blank heat-sensitive chart. All four traces share the same time line reference which the Truline prints. This eliminates the error caused by pen alignment offsets in conventional pen designs. Since the Truline prints the chart and generates the analog traces at the same time, there is no error due to variations in chart size caused by changes in temperature and humidity. With microprocessor electronics and single printhead, the Truline recorder is easily configured by users to meet a variety of application requirements - from metals to food processing. Models with up to four input channels accept inputs from any one of a variety of sensors or transmitters within the configurable range limits. Also, models are available with one or two independent digital controllers to generate controlled output signals which will operate valves, dampers, heating elements, etc. for process control.

Honeywell Truline circular chart recorders accept directly connected process signals which allow them to process data and create the chart under actual environmental conditions, eliminating the risk of temperature and humidity expansion of the paper and enhancing its accuracy. The chart recorders use single or dual pens or a “hot-stylus” type pen to produce the chart image. The simple design of these chart recorders makes them easy to operate even by inexperienced operators, and the modular construction makes them easy to maintain, modify and service. The bright, digital display and a dedicated configuration keypad bring further convenience to the user. These chart recorders come with NEMA 3 or NEMA 4 front face protection, making them suitable for tough production environments.