CHI150 Calomel Reference Electrode
Brand: CH Instruments | Category: Nanotechnology
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.
Selected manufacturer specifications
| Parameter | Value |
|---|---|
| Reference system | Saturated calomel electrode, Hg/Hg₂Cl₂ |
| Published reference potential | 0.241 V versus NHE at 25 °C |
| Electrolyte | Saturated KCl |
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)
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