Hg/HgO Reference Electrodes for Alkaline Solutions
An Hg/HgO electrode, also written HgO reference electrode or mercury oxide electrode, is the usual reference electrode for alkaline electrolytes such as KOH and NaOH, including alkaline water electrolysis and AEM studies. METNMAT sells Hg/HgO electrodes with glass, PTFE and PEEK bodies, in Ø4 mm and Ø6 mm.
METNMATFlow Cell Accessories - Mercury Oxide Reference Electrode Hg/HgO Glass Rod Ø4 × 70
₹7,080/ pc · incl. GST
MOQ: 1 pcMade to order
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GST invoice
METNMATHg/HgO Reference Electrode (Ø6 × 60 mm, PTFE Rod)₹38,940/ pc · incl. GST
MOQ: 1 pcIn stock
GST invoice
METNMATHg/HgO Reference Electrode (Ø4 × 60 mm, PEEK Rod)₹43,660/ pc · incl. GST
MOQ: 1 pcIn stock
How to use an Hg/HgO electrode
- Potential
- About +0.098 V vs SHE in 1 M KOH, the value most alkaline electrolysis papers use.
- Filling solution
- Match it to your electrolyte, commonly 1 M KOH or NaOH.
- Body
- PTFE or PEEK resists hot, strong alkali better than glass.
- Handling
- It contains mercury. Follow your lab's rules for storage and disposal.
Price list
| Product | Price incl. GST |
|---|---|
| Flow Cell Accessories - Mercury Oxide Reference Electrode Hg/HgO Glass Rod Ø4 × 70 | ₹7,080 |
| Hg/HgO Reference Electrode (Ø6 × 70 mm) | ₹23,600 |
| Hg/HgO Reference Electrode (Ø6 × 60 mm, PTFE Rod) | ₹38,940 |
| Hg/HgO Reference Electrode (Ø4 × 60 mm, PEEK Rod) | ₹43,660 |
Frequently asked questions
What is the price of Hg/HgO reference electrodes in India?
Prices for METNMAT's Hg/HgO reference electrodes run ₹7,080 to ₹43,660 including GST, with free shipping within India and a GST invoice. Each product page shows its exact price.
Why use Hg/HgO in alkaline solutions?
Its reaction involves hydroxide ions, so it is stable in KOH and NaOH, and it leaks no chloride into the cell.
How do I convert Hg/HgO to RHE?
At 25 °C, E(RHE) = E(Hg/HgO) + 0.098 V + 0.059 × pH, with 0.098 V as the electrode's potential in 1 M KOH. Calibrating your own electrode is more accurate.