Dri-Ref™ reference electrodes were developed by WPI to have extremely low electrolyte leakage properties, hence the name “Dri-Ref.” In addition to this key feature, these electrodes exhibit stable and reproducible potential and low resistance. Stored in KCl when not in use, they have a long life expectancy. Low leakage is achieved by using KONBO™, a product combining modern ceramic and conductive polymer technology, as the liquid junction. Electrode resistance is low, an important consideration when making low-noise measurements.
Although the internal filling solution contains KCI, the low fluid leakage means Dri-Ref may be used in combination with ion selective electrodes, including those for K+ and Cl-, without significant contamination from the reference electrode.
The Dri-Ref electrodes are chemically resistant to strong acids and alkalines. Dri-Ref electrodes are not suitable for use in organic solvents. In addition, the long, thin FLEXREF may be easily manipulated to accommodate a difficult experimental setup.
SUPER-Dri-Ref
With a diameter of 2-mm, SUPER-Dri-Ref does not leak electrolyte at all. Exhibiting the electrical stability of a classic flowing junction reference cell, this electrode exhibits low resistance and a stable half-cell potential essentially independent of sample electrolyte concentration. SUPER-Dri-Ref is ideal for small volume and low salt concentration measurements.
Micro-Reference Electrode
Only 450µm in diameter and 1inch long, WPI’s new DRIREF-450 reference electrode can be used along with other sensors in space-restricted areas and very small sample volumes.
Luer-Tip Reference
The male luer fitting at the front of the
DRIREF-L
allows it to be easily connected to a female luer port (see WPI’s luer fittings) to form a tight seal — a very convenient installation for a flow-through system.
Comparison Chart of DriRef Specifications
| Electrode |
Length |
Diameter |
Construction |
Lead Length |
Connector
|
Resistance (typical) |
Filling Solution
|
Electrolyte Leakage (mL/hr)
|
| DRIREF-450 |
2.54cm
|
450µm |
Coated Glass
|
30 in. (76cm
|
2mm pin |
< 5KΩ
|
KCl |
— |
| DRIREF-5 |
9cm
|
4.7mm
|
Epoxy |
30 in. (76cm)
|
2mm pin
|
~500Ω
|
KCl |
>
~7.4×10-7
|
| DRIREF-2 |
13cm
|
2mm
|
Isoplast™
|
30 in. (76cm)
|
2mm pin
|
~2.7KΩ
|
KCl |
~5.7×10-8
|
| FLEXREF |
13cm
|
1.5 mm
|
Teflon™
|
30 in. (76cm)
|
2mm pin
|
~2.7KΩ
|
KCl |
~5.7×10-8
|
| SDR2 |
9cm
|
2 mm
|
PVC |
30 in. (76cm)
|
2mm pin
|
< 5KΩ
|
KCl |
— |
|
DRIREF-L
|
7.5cm
|
Standard Luer
|
Polypropylene |
30 in. (76cm)
|
2mm pin
|
~500Ω
|
KCl |
~7.4×10-7
|
| DRIREF-5SH |
3.5cm
|
4.7mm
|
Epoxy |
30 in. (76cm)
|
2mm pin
|
~500Ω
|
KCl |
~7.4×10-7
|
|
DRIREF-2SH
|
2cm
|
2 mm
|
Isoplast™
|
30 in. (76cm)
|
2mm pin
|
~2.7KΩ
|
KCl |
~5.7×10-8
|
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If you
have any questions regarding the use or specifications of Dri-Ref reference electrodes or other WPI products, give us a call toll-free at 866.606.1974 or email us at
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