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pH Electrode

The Unisense pH electrode, here shown with a tip diameter of 100 µm.
The pH microelectrode can be mounted with a steel needle to make the glass sensor strong in the longitudinal axis.
The pH microelectrode must be connected to a reference electrode to obtain a sensor signal. Here robust reference electrode is sho...
The pH microelectrode signal must be amplified by a Unisense amplifier e.g. the laboratory pH/mV-Meter.
The pH sensor tip consists of two pieces of glass glued together. The pH glass is proton sensitive, thus the sensing part of the s...
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Miniaturized pH electrode

The Unisense pH electrode offers you a fast and reliable research tool. With tip sizes down to 10 µm, you can complete high resolution and non-destructive microprofiles in a wide range of microenvironments.

The pH microelectrode is designed for research applications within:

  • Environmental sciences
  • Biomedical sciences
  • Biotechnology
  • Food science e.g. cheese production
  • Microbiology

Microelectrode technology:

This microelectrode is a miniaturized conventional pH electrode based on selective diffusion of protons through pH glass, and the determination of potentials between the internal electrolyte and a reference electrode. The reference electrode can be either external (separate electrode) or internal; however, we only recommend internal references in applications where it is not possible to place two electrodes in the sample.

Ordering Information


Standard Glass SensorOutside tip diameter
pH-108-12 µm
pH-2520-30 µm
pH-5040-60 µm
pH-10090-110 µm
pH-200180-220 µm
pH-200C 180-220 µm (combination electrode with internal reference electrode)
pH-500400-600 µm
pH-500C400-600 µm (combination electrode with internal reference electrode)
pH-MR400-600 µm
pH-N1,1 x 40 mm - needle sensor
pH-NP1,6 x 40 mm - needle sensor for piercing

Find full pH microelectrode specifications below and possible microelectrode customizations and adaptations under Related Products found to the right.

View pH Microelectrode Specifications

Technical information

View electrode specifications

Related products

Sensor Customization

Portillo,M.C. et al (2010), Moonmilk Deposits Originate from Specific Bacterial Communities in Altamira Cave (Spain), Microbial ecology, 1 - 8, vol.

Liniger,M. et al (2003), Cleavage of trypanosome surface glycoproteins by alkaline trypsin-like enzyme (s) in the midgut of Glossina morsitans, International journal for parasitology, 1319 - 1328, vol. 33 Read abstract

Kamp,A. et al (2006), Anaerobic sulfide oxidation with nitrate by a freshwater Beggiatoa enrichment culture, Applied and Environmental microbiology, 4755 - 4760, vol. 72 Read abstract

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