Ceramic Outer Tube for D-Torch. Compatible with Thermo 6000/7000 Duo Series ICP-OES D-Torch (30-808-2844, 501694650). Compared to quartz outer tubes, the ceramic alternative has an extended lifespan, significantly reducing maintenance, cleaning, and downtime caused by torch failure. Incorporating a ceramic outer tube into your ICP torch has a range of benefits, particularly for the analysis of high-TDS sample matrices, fusions, wear metals in oil, hydrofluoric acid (HF) and volatile organics. In addition to providing durability, the ceramic outer tube on an ICP torch produces a hotter, more robust plasma, which reduces matrix effects and improves sensitivities and detection limits, compared to a quartz torch.When not in use, clean as per recommended guidelines, and store in original box.Optional quartz outer tube P/N NC2046973.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001