CHI151 Mercury/Mercurous Sulfate Reference Electrode
Brand: CH Instruments | Category: Nanotechnology
The CHI151 is the mercury / mercurous sulfate reference electrode in the CH Instruments range, running on Hg2SO4 + 2e = 2Hg + SO4 2- at a published 0.64 V against NHE at 25 C. Saturated K2SO4 is the filling solution and a ceramic liquid junction carries the contact, with the published drawing showing a 9.0 mm diameter chamber 37 mm long above a 5.3 mm diameter stem 50 mm long. CH Instruments direct users to refill with saturated K2SO4 and to store the electrode standing in the same solution.
Selected manufacturer specifications
| Parameter | Value |
|---|---|
| Reference system | Mercury / mercurous sulfate |
| Published reference potential | 0.64 V versus NHE at 25 °C |
| Electrolyte | Saturated K₂SO₄ |
The stated potential is tied to the manufacturer’s temperature and electrolyte conditions. Confirm laboratory handling requirements and application compatibility. Checked 2026-09-29.
Manufacturer reference document (opens in a new tab)
Confirm your configuration
Share the details you know so we can prepare a comparable, itemised offer.
- Exact host instrument/model and intended experiment
- Mechanical, electrical, optical or material compatibility as applicable
- Required dimensions/range, connectors, included parts and quantity
Get a Quote
Request an itemised quotation covering the proposed configuration, availability, lead time and agreed supply and support scope.
Useful details to share
- Materials, sample dimensions and process or measurement goal
- Required performance and existing instrument interfaces
Share what you know. You can start with your name and a phone number or email; final specifications can follow.
Not sure which configuration you need? Help me choose
Contact Vvon Technologies Limited about CH Instruments equipment requirements in Bangladesh.
Phone: +8801805987890 | Email: info@vvon.com.bd
More from Accessories & Modules
- CHI152 Alkaline/Mercury Oxide Reference Electrode
Built as Hg/HgO/1M NaOH, the CHI152 is the reference electrode CH Instruments publish for highly alkaline electrolytes, quoted at 0.098 V against NHE at 25 C for HgO + H2O + 2e = Hg + 2OH-. Its outer body is Teflon, which CH Instruments state keeps it strong in high alkaline solution, and users may swap the 1M NaOH for 6M NaOH or 6M KOH provided the concentration stays at or below 6M. The chamber ships filled with distilled water for transport safety and must be refilled before first use, and the published drawing gives an 11 to 15 mm diameter head 40 to 45 mm long over a 6.4 mm diameter stem 60 to 65 mm long ending in a white ceramic junction.
- CHI150 Calomel Reference Electrode
Published in full as the CHI150 Saturated Calomel Electrode (SCE), this reference electrode works on Hg2Cl2 + 2e = 2Hg + 2Cl- and is quoted at 0.241 V against NHE at 25 C. Its saturated KCl filling solution meets the test solution through a ceramic liquid junction, and the published drawing gives a 9.0 mm diameter upper chamber 37 mm long over a 5.3 mm diameter lower stem 50 mm long. CH Instruments instruct users to top up with saturated KCl when the level falls and to store the electrode dipped in saturated KCl after use.
- CHI172-xxx Electrode leads for model number xxx
CHI172-xxx is the generic ordering code for a set of electrode leads, where xxx is replaced by the instrument model number, for example 600 or 710B. CH Instruments publish one photograph for the CHI172 electrode leads covering the family. Separate part numbers exist where a particular series needs its own lead set.