Available as microsized
For laboratory and in situ use

Reference microelectrode

Reference electrode for pH or Redox microelectrodes

Our reference electrodes are simple silver/silver-chloride open-ended electrodes designed to work with potentiometric microelectrodes, such as the pH and Redox microelectrodes. Read more...

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Technical Data
Ordering Information & Sizes
Manuals & Videos
Reference electrode

The right choice for your application

For measurements with Reference electrodes, it is important that the measuring sensor is in fluid contact with the reference. For most purposes this can be achieved with a large macro-reference. For some applications the sample is so small, e.g. a droplet, that the reference must be as small as the measuring microelectrode.

  • Our micro-sized reference electrodes are glass electrodes manufactured at Unisense.
  • For in situ use, Unisense manufactures a pressure-compensated macro electrode.
  • For laboratory use, Unisense provides a macro reference electrode from Radiometer Analytical.
Electrode and reference_1400x800
Cables & Connectors
Feature Standard Options Extra price for option selection
Total length 150-200 mm 70-350 mm 20-50%
Total length REF-RM Approx. 190 mm
Diameter 20 mm from tip <2mm (not REF-RM) <1 mm 10%
Diameter 50 mm from tip 8 mm <2 mm 20%
Shaft diameter 8 mm
Shaft protection diameter* 11 mm Can be omitted

*When mounted with in situ mini connectors, the shaft has no protection mounted, but fits directly into the in situ sensor mounts with pressure compensation. In situ sensors have a standard length of 130-160 mm.

Cables & Connectors
Item Standard Options Extra price for option selection
Cable Co-axial, 3mm
Cable length 1.5-2 m 0-20 m Yes, depends on length
Cable length REF-RM 1.3 m
Connector 4 mm banana plug LEMO or BNC
Connector REF-RM 4 mm banana plug BNC
In situ gold pin connector No Yes
Attribute Standard Extra price for option selection
Lifetime >1 year
Temperature range -10-40°C
Reference type Ag+ / AgCl 30%
Waterproof Yes
Ordering information & Sizes
Ordering information & Sizes
Reference Electrode Size and description Options Extra price for option selection
REF-RM 5 mm - robust reference electrode
REF-10 8-12 µm - microelectrode 3-5 µm | 25 µm | 50 µm 20%
REF-100 90-110 µm - microelectrode 110-400 µm 20%
REF-N 1.1 x 40 mm - needle electrode
REF-NP 1.6 x 40 mm - needle electrode for piercing
REF-ST-1/4 1/4'' steel tube
REF-SL-1/4 FT-cell 1/4'' Swagelok Tee
REF-SL-1/8 FT-cell 1/8'' Swagelok Tee
REF-PEEK-1/8 FT-cell 1/8'' PEEK Tee
REF-PEEK-1/16 FT-cell 1/16'' PEEK Tee
REF-FT-GLASS-6 Glass FT-cell 6 mm outer diameter
REF-FT-GLASS-8 Glass FT-cell 8 mm outer diameter
REF-Insitu 5 mm - in situ electrode
REF-Insitu-ST-1/4 1/4'' steel tube - in situ
REF-Insitu-SL-1/4 FT-cell 1/4'' Swagelok Tee - in situ