Clark Borosilicate Theta

Clark Borosilicate Theta

The properties of borosilicate glass make it the most popular material among researchers for the fabrication of electrodes and micro-pipettes.

  • Easy to fill
  • Two channels in a single diameter
  • High quality borosilicate glass
  • Outside diameters in 1.5 and 2.0 mm
  • Economical

Item# Description U.S. List Price Quantity
30-0116 Borosilicate Theta Glass, 1.5 mm OD, 0.23 mm Wall, 0.17 mm Septum, 75 mm L, Pkg. of 100
30-0114 Borosilicate Theta Glass, 1.5 mm OD, 0.23 mm Wall, 0.17 mm Septum, 100 mm L, Pkg. of 100
30-0115 Borosilicate Theta Glass, 1.5 mm OD, 0.23 mm Wall, 0.17 mm Septum, 150 mm L, Pkg. of 100
30-0119 Borosilicate Theta Glass, 2.0 mm OD, 0.30 mm Wall, 0.22 mm Septum, 75 mm L, Pkg. of 100
30-0117 Borosilicate Theta Glass, 2.0 mm OD, 0.30 mm Wall, 0.22 mm Septum, 100 mm L, Pkg. of 100
30-0118 Borosilicate Theta Glass, 2.0 mm OD, 0.30 mm Wall, 0.22 mm Septum, 150 mm L, Pkg. of 100
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The low softening temperature of this glass combined with its mechanical strength, chemical resistance, high electrical resistivity, and ability to withstand thermal stress make these capillaries the most widely used in the world.

Theta wall Clark borosilicate capillaries are offered with septum dimensions of 0.17 mm and 0.22 mm.

Micropipettes and microelectrodes manufactured from Clark glass are used primarily in intracellular and extracellular research. The end user can manufacture their own microelectrodes and micropipettes using standard pipette pulling and microforge techniques.

OD mmID mmWall Thickness mmTolerance
(mm)
LengthQty/PkgModelOrder #
1.5 1.17 0.23 ±0.05 75 mm 100 TGC150-7.5 30-0116
 100 mm 100 TGC150-10 30-0114
150 mm  100 TGC200-15 30-0115
2.0 0.22 0.30 ±0.10 75 mm 100 TGC200-7.5 30-0119
 100 mm 100 TGC200-10 30-0117
 150 mm 100 TGC200-15 30-0118
Specifications
Composition 80.9% SiO2, 12.9% B2O3,
4.4% Na2O, 1.8% Al2O3
Softening Temp 815°C
Dielectric Const 4.7
Septum Dimensions 0.17 mm for 1.5 mm OD
0.22 mm for 2.0 mm OD
Tolerance
(OD)
± 0.05 mm - 0.10 mm, depending on OD



OD mmID mmWall Thickness mmTolerance
(mm)
LengthQty/PkgModelOrder #
1.5 1.17 0.23 ±0.05 75 mm 100 TGC150-7.5 30-0116
100 mm 100 TGC150-10 30-0114
150 mm  100 TGC200-15 30-0115
2.0 0.22 0.30 ±0.10 75 mm 100 TGC200-7.5 30-0119
100 mm 100 TGC200-10 30-0117
 150 mm 100 TGC200-15 30-0118