![串联1 串联1](http://en.pat-tech.com/uploadfile/ueditor/image/202103/1616063730514323.jpg)
are mainly 1-core cables with these features:
■defined Ohm-resistance per meter
■constant heating power across the overall temperature range
■variable connecting voltage up to 750 V
■optimal monitoring by series connection of resistances
■simple heating circuit setup for long pipelines with only one feed
■low cabling works
■useable in explosion-endangered areas even in ATEX-certified design
■suitable for aggressive ambient conditions
Temperature range from -60 °C to +260 °C
![Series Heating System](http://pat-tech.com/uploadfile/thumb/812b4ba287f5ee0bc9d43bbf5bbe87fb/340x230_auto.jpg)