Hydrogen reference electrodes

These reference electrodes are designed for any application involving electrochemistry. Their PTFE body makes them particularly suitable for the most demanding conditions and operating conditions: protic solvents, corrosive electrolytes, high temperatures…They also provide the advantage of being Hg-free, following RoHS recommendations.

Benefits of Reversible Hydrogen Electrodes (RHE)

• Mercury free
• Good for EIS
  • Resistance typically around 1 Ohm, whereas it is between 1 kOhm and 10 kOhm for traditional electrodes
• No contamination
  • Outlet of inner reference electrolyte (KCl, K2SO4, Hg+, Ag+) into test electrolyte. May contaminate your test liquid or introduce corrosion
• Wide pH (-2 to 16) and temperature range (-20 to 210 °C)
• Not sensitive to temperature or pH changes
  • The temperature of RE and WE can differ, as they are in two different liquids (reference electrolyte and test electrolyte).
  • pH effect on potential of working electrode has to be take into account. In the case of potential and pH changes during measurement continuous pH measurement essential
• No maintenance
  • Reference electrolyte has to be controlled regularly.
• Not breakable
  • Reference made usually out of glass (risk of breakage)
• No frit
  • Frit between reference and test electrolyte may fall out, get blocked, change during life time, let test electrolyte into the reference electrolyte.

HydroFlex® and MiniHydroFlex®.

The HydroFlex®, with an electrode shaft diameter OD of 8 mm, is compatible with EL-ELECTRO, EL-CORR, EL-FLAT cells using dedicated bridge tubes (see specification tab).

Both HydroFlex® and MiniHydroFlex® are compatible with Gaskatel voltammetric cells, FlexCell® also provided by BioLogic.

Hydrogen is contained within a cartridge that is easily replaceable. On the left, the HydroFlex®, and on the right, the MiniHydroFlex®.