The new Stable-tip electrode
holders eliminate the final instability link in the electrophysiology
experimental setup. We’ve taken a thermally stable base
material and coated it with aluminaoxide. This coating has
two benefits: first, it is non-conductive so the holder does
not act as an electrical antenna; second, it is very resistant
to corrosion.
Under conditions of a high resistance electrode seal (gigaseal),
the ST series electrode holder has a noise level of 0.79–0.80
pA RMS (5kHz filter); polycarbonate measured 0.78–0.79
pA (reported using an Axopatch 200B in whole-cell mode). The
base material of the Stable-tip has a thermal expansion coefficient
of 23μm/m°C versus 70μm/m°C of a polycarbonate
holder. That is an improvement by a factor of three.
The Stable-tip electrode holders come with one (1) each of
Ag-wires and wire seals. The universal clamp design will accommodate a range of electrode glass from 1mm-2mm.
The use of fire polished glass is strongly recommended. The use of non-fire polished glass will wear out the seal prematurely.
NOTE: Pipette seals
are not required for the latest model ST-50. When ordering,
specify the headstage amplifier. If ordering for a Axon CV-4
the major diameter of the mounting feature is needed.
Model
Description
ST50-200/HS
Fits
Axon 200/700 & HS-2A amplifiers
ST50-BNC
Fits
amplifiers with BNC connectors
ST50-CV
Fits
Axon CV-4 amplifiers
Specifications
• High thermal stability
• Low noise
• Versions for BNC and threaded headstage attachment
