HSRLB:
Heated Sample Line (Jumpers) are used when source sampling site has limited access and insufficient space for a traditional, rigid sample train. Apex Instruments manufactures short heated sample lines/jumpers for use between the heated filter assembly and the first impinger inlet.
![](https://en.emproco.com/wp-content/uploads/2020/12/Unheated-Sample-Line-Legend-HSRLB-10.2.17.jpg)