Ideal for titrations and general-purpose applications, this glass-body calomel reference electrode has a single ceramic junction in the outer reference cell and calomel references. In addition, this electrode features a 0.15" (4 mm) banana connector.
Ideal for titrations and general-purpose applications, this glass-body calomel reference electrode has a single ceramic junction in the outer reference cell and calomel references. In addition, this electrode features a 0.15" (4 mm) banana connector.
Glass body
The glass body is ideal for laboratory use. The glass is resistant to many harsh chemicals and is easily cleaned. The glass body also allows for a fast transfer of heat to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the equilibrium the steadier the reference potential.
Single ceramic junction
The outer junction of an electrode, also known as a salt bridge, is necessary component of the electrical circuit. The movement of ions must flow through the junction for a steady reading. The outer reference has a single ceramic frit. The ceramic is a porous material that is easily fused with the glass body and has a similar expansion coefficient. A single ceramic junction has a flow rate of 15-20 μL/hour. Other junction types are available with higher flow rates and made with different materials.
Refillable
The reference electrode is refillable. Since it is a double junction electrode the fill solution is the HI7082 3.5M KCl. This solution does not contain any silver as with single junction electrode. The absence of silver will prevent any silver precipitate from forming at the junction surface and clogging it. Clogging of the junction will result in drifty and erratic readings.
0.157" (4 mm) Connector
The reference electrode uses a 4 mm banana connector. This type of connector is easily plugged into the reference input on suitable meters. Other type of connectors include BNC, DIN, screw type, T-type, and 0.137" (3.5mm) to name a few. These types of connectors tend to be proprietary for a particular type of meter and are not interchangeable.
| Reference Cell Type | Single, Hg/Hg2Cl2 |
| Junction Type/Flow Rate | Ceramic, single / 15 to 20 μL/h |
| Refill Electrolyte | 3.5 M KCl |
| Body Material | Glass |
| Maximum Pressure | 0.1 bar |
| Temperature Operating Range | 23 to 140°F (-5 to 60°C) |
| Cable | 3.3' (1 m) |
| Connector Type | 0.157" (4 mm) banana |
| Body Length/Overall Length | 4.72/6.9" (120/175.5 mm) |
| Outer Diameter | 0.47" (12 mm) |
| Reference Cell Type | Single, Hg/Hg2Cl2 |
| Junction Type/Flow Rate | Ceramic, single / 15 to 20 μL/h |
| Refill Electrolyte | 3.5 M KCl |
| Body Material | Glass |
| Maximum Pressure | 0.1 bar |
| Temperature Operating Range | 23 to 140°F (-5 to 60°C) |
| Cable | 3.3' (1 m) |
| Connector Type | 0.157" (4 mm) banana |
| Body Length/Overall Length | 4.72/6.9" (120/175.5 mm) |
| Outer Diameter | 0.47" (12 mm) |
