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H2 Microsensor

Highly sensitive hydrogen microsensor

The Unisense hydrogen microsensor offers you extraordinary sensitivity allowing reliable hydrogen measurement even in natural systems. The sensor is fast responding and the tip can be miniaturized down to 2-3 µm achieving high spatial resolution.

The microsensor construction makes it possible to use the hydrogen microsensor in a broad variety of research fields where high quality, non-destructive, fast and accurate measurements are required. The hydrogen microsensor is designed for research applications within:

  • Environmental sciences
  • Biomedical sciences
  • Biotechnology
  • Research on photochemical water splitting
  • Effect of H2 enriched drinking water

Microsensor technology

The hydrogen micro- and minisensors are all Clark-type sensors measuring hydrogen partial pressure. The working principle of the hydrogen microsensor is based on diffusion of hydrogen through a silicone membrane to a hydrogen oxidizing platinum anode. The reducing anode is polarized against an internal Ag/AgCl cathode. The resulting sensor signal is in the pA range and is measured by a high quality picoammeter e.g. the Unisense Microsensor Multimeter.

As hydrogen concentrations found in natural systems are generally very low, a low detection limit of the sensor is important. Generally the detection limit of the sensors is close to 0,02% of hydrogen (0,1 µM in water) but it is possible to make all but H2-10 and H2-25 sensors even more sensitive if they are provided with a large tip membrane. Low range sensors have more sensitivity to stirring due to the larger analyte consumption rate.

Ordering Information

Standard Glass Sensor Outside tip diameter
H2-10 8-12 µm
H2-25 20-30 µm
H2-50 40-60 µm
H2-100 90-110 µm
H2-500 400-600 µm
H2-500LR 400-600 µm - for low concentration range applications
H2-MR 400-600 µm
H2-N 1,1 x 40 mm - needle sensor
H2-NP 1,6 x 40 mm - needle sensor for piercing
H2-NPLR 1,6 x 40 mm - needle sensor for piercing and for low concentration range

Find complete hydrogen microsensor specifications, including warranty and expected life time, below and possible microsensor customizations and adaptations under Related Products found to the right.

View H2 Microsensor Specifications

Technical information

View sensor specifications

Related products

Sensor Customization

Sick, Torben et al (2018), Oriented Films of Conjugated 2D Covalent Organic Frameworks as Photocathodes for Water Splitting, Journal of the American Chemical Society, 2085 - 2092, vol. 140 Read abstract

Sherman, Benjamin D. et al (2016), A Dye-Sensitized Photoelectrochemical Tandem Cell for Light Driven Hydrogen Production from Water, Journal of the American Chemical Society, 16745 - 16753, vol. 138 Read abstract

Kajiya, Mikihito et al (2009), Hydrogen from intestinal bacteria is protective for Concanavalin A-induced hepatitis, Biochemical and Biophysical Research Communications, 316 - 321, vol. 386 Read abstract

Brand, Andreas et al (2007), Microsensor for in situ flow measurements in benthic boundary layers at submillimeter resolution with extremely slow flow, Limnology and Oceanography: Methods, 185 - 191, vol. 5

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Unisense user workshop

Unisense user workshop

Do you want to learn more about microsensors? We invite customers to join one of our user workshops here at Unisense. The program is a mix of theoretical lectures and hands-on experiments.

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