new test tubes

NMR tubes (2D-barcode & constriction)

The production of reference samples, which have to be stored long-term stable and have to be marked, requires a suitable tube. Especially for this demand, we produce NMR tubes with pretapered melting positions, which simplifies sealing the tubes. Due to the tapered position the tubes can be ablated more quickly and with minimal heat exposure, which leads to a protection of the reference samples and simplifies the handling of the tubes for users. In addition, the tubes can be marked with 2D DataMatrix Code, which ensures an identification of the sample, even after years, thanks to the unique number. The code can be customized and be read without any problems with an appropriate camera and set-up. Since the marking is worked directly into the glass, the labeling is irreversible.


  • Borosilicate glass (e.g. DURAN©, PYREX©, SIMAX©)

Process of Production

  • Redrawing method combined with hot forming and laser structuring


  • Diameter: 5 mm (4,95 mm)
  • Lengths: 178/203 mm
  • Wall thicknesses: 0,24 mm/0,38 mm/0,5 mm


  • With lenticular bottom
  • With constriction
  • With 2D-barcode


  • Round


  • Easy ablation of standard samples
  • Longterm archiving
  • Irreversible marking in the glass


  • Analytics
  • Chemistry
  • Pharmacy
  • Medicine
  • Nuclear magnetic resonance imaging (NMR)
  • Glass tube with side-opening
  • Glass fibers with sphere formed end
  • NMR Tubes with thread for low vacuum applications
  • Mark tubes with special inner surface
  • Mini test tubes with extended flange
  • New preform for redrawing of capillaries
  • Test tubes with sagging at the bottom
  • Cloning cylinders with numbering
  • Large-volume theta cross-section capillaries
  • High tightness with new standard cap
  • Complex component made of quartz glass
  • Dropper pipettes in many sizes and designs
  • Packing glasses protected from light
  • Ampoules with built-in test leckage
  • Thick-walled sample vessels
  • Measuring ampoules with conical bottom
  • Special glass capillaries for measurements
  • Glass capillaries with constriction
  • Finely scaled glass cannulas
  • CNC processing of glass plates
  • New 5 mm NMR standard caps
  • Glass crucible for thermal analyses
  • Glass capillaries with graduation
  • Square capillary with 9 internal channels
  • 9-fold capillary made of borosilicate glass 3.3
  • Our tool for cutting glass capillaries
  • Diamond wire for cutting capillaries
  • Sight glasses (laser structured)
  • Very thick-walled capillaries
  • Polyimide coated filling needles
  • Ampoules with small volume
  • NMR tubes colored (UV protection)
  • NMR septum caps (increased denseness)
  • NMR tubes (barcode & constriction)
  • Mark tubes with perforated bottom
  • Test tubes with hole e.g. as vent
  • Test tubes with grooved rim
  • Oval capillaires (thin-walled)
  • Triangular capillaries (thin-walled)
  • Twisted capillaries by hot forming
  • Multi-channel capillaries (circular array)
  • Special light pipe made of glass
  • Luggin-capillary for measurements
  • Test mandrels (different materials)
  • Carpoules with special-rolled rim
  • Glass capillary for the stimulation
  • XRD-capillary with Luer-connector
  • Glass nozzle with seal-and retaining ring
  • Glass capillary with side-mounted connectors
  • Easily destructible glass ampoules
  • Glass rods with surface patterning
  • Long-conical focusing nozzles
  • Surface patterning of glass substrates
  • Laser sublimation-drilling in flat capillaries
  • Thin needles up to 180 ° flexible
  • Glass needles with curved tip
  • Polished to precision glass rings
  • Glass rods with partially-frosted surface
  • Sealing glass with high thermal expansion