Compare Dri-Ref Reference Electrodes
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.
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.
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.
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|