Dri-Ref --Reference Electrodes

Dri-Ref™reference electrodes, developed by WPI, exhibit stable and reproducible potential, low resistance and extremely low electrolyte leakage. When stored in KCl solution, they have long life.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, alkalies and organic solvents. In addition, the long, thin FLEXREF may be easily manipulated to accommodate a difficult experimental setup.

A
 DRIREF-450
E
 FLEXREF
B
 DRIREF-5
F
 DRIREF-L
C
 DRIREF-2
G
 DRIREF-5SH
D
 SUPER-DRI-REF,SDR2
H
 DRIREF-2SH
SUPER-Dri-Ref

Most recently, WPI's research staff has created an exciting new addition to the field of reference half-cell electrodes. SUPER-Dri-Ref, a reference electrode with a diameter of 2 mm, 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 450 µm in diameter and 2 inches long, WPI's new DRIREF-450 reference electrode can be used along with other sensors in space-restricted areas and very small sample volumes.

New Luer-Tip Reference

The male luer fitting at the front of this new DRIREF-L allows it to be easily connected to a female luer port (see WPI's luer fittings kit) to form a tight seal -- a very convenient installation for a flow-through system.

DRI-REF SPECIFICATIONS

DRIREF-5 DRIREF-5SH DRIREF-2 DRIREF-2SH FLEXREF SDR2 DRIREF-450 DRIREF-L
LENGTH 9 cm 3.5 cm 13 cm 2 CM 13 cm 9 cm 8 CM 7.5 CM
DIAMETER 4.7 mm 4.7 mm 2 mm 2 MM 1.5 mm 2 mm 450<µ> Standard Luer
CONSTRUCTION Epoxy Epoxy Isoplast™ Isoplast™ Teflon™ PVC Coated Glass Polypropylene
LEAD LENGTH 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)		 30 in.
(76 cm)
PLUG 2 mm pin 2 mm pin 2 mm pin 2 mm pin 2 mm pin 2 mm pin 2 mm pin 2 mm pin
RESISTANCE (typical) ~500 Ohms ~500 Ohms ~2.7 K Ohms ~2.7 K Ohms ~2.7 K Ohms <5 K Ohms <5 K Ohms ~500 Ohms
FILLING SOLUTION KCl KCl KCl KCl KCl KCl KCl KCl
ELECTROLYTE
LEAKAGE (ml/hr)		 ~7.4x10-7 ~7.4x10-7 ~5.7x10-8 ~5.7x10-8 ~5.7x10-8
-
-
 ~7.4x10-7
FLEXREF Flexible Dri-Ref, 1.5 mm diam.
DRIREF-2 Dri-Ref, 2 mm diam.
DRIREF-2SH Dri-Ref, 2 mm diam. (Short)
DRIREF-5 Dri-Ref, 4.7 mm diam.
DRIREF-5SH Dri-Ref, 4.7 mm diam. (Short)
SDR2 SUPER-Dri-Ref, 2 mm diam.
DRIREF-450 Micro-Dri-Ref, 450 µm diam.
DRIREF-L Reference Electrode with Luer Tip