The professional Blue Line of welders is available with four types of temperature control. They can be also ordered with top of the line acoustic and visual signalling TraceWeld .
The above system provides the welding process times according to the material type and the pipe size.

The P-4a welder has the infinitely variable temperature settings from 180 to 280 °C. The temperature set point is achieved by turning the control button.
The P-4a welder with acoustic signalling TraceWeld provides the welding process times. The temperature settings is made by the inner part of the control button, while the process signalling times are given by entering the pipe size by the outer part of said button with click in positions for each pipe size settings.

The P-4b welder lets you set the welding temperature with a thumb switch with steps of 5 °C. The minimum set temperature is 100 °C. That would allow welding of materials with very low melting point.

The P-4c allows to set infinitely variable welding temperature and
acoustic signalling by the three push buttons. The temperature is shown on the display. The TraceWeld system is controlled by one multifunction push button, where the long push would set the pipe size and the short push would start the welding cycle timing.