The absolutely sealed small-volume H-type cell runs closed with about 10 mL of electrolyte per compartment. The electrodes plug into socket connections inside the PTFE lid. The cathode and anode compartments are separated by an ion exchange membrane. This keeps products formed at one electrode from crossing to the other electrode and reacting again, and lets you control the electrolyte, pH and gas atmosphere of each compartment independently.

The flanges of the two compartments are joined with a chain clamp; opening the clamp lets you change the membrane in minutes. The reference electrode sits in the same compartment as the working electrode, which reduces the ohmic (iR) drop in solution. Gas connections are hose barbs as standard; PEEK quick connectors are available on request. With the valve assembly fitted, all connections run through quick connectors with 3 mm PTFE tubing (manufacturer data).

In the absolutely sealed cell the electrodes plug into socket (jack) connections inside the lid, isolating the system completely from the outside. With valves fitted, the cell can be evacuated (below −100 kPa) or operated under slight pressure (max. 0.5 MPa, manufacturer data). The electrodes are made to fit this cell and must be ordered together with it.

The body is made of borosilicate glass 3.3, which has low thermal expansion (3.3 × 10⁻⁶ K⁻¹) and the highest resistance classes against water (HGB 1) and acids (S 1). Avoid sudden temperature differences above 120 °C to reduce the risk of breakage.

Key Features

10 mL per compartment, absolutely sealed
Socket-connected electrodes
Sub-surface gas sparger
Three options: single-layer, with sampling port, jacketed
Optional valve assembly and PEEK quick connectors

Technical Specifications

Cell type	Two-compartment H-type, absolutely sealed
Volume	10 mL per compartment
Body	Borosilicate glass 3.3
Electrode connection	Socket (jack) in the PTFE lid
Gas connection	Hose barb (standard); PEEK quick connector optional
Valve	Valve assembly sold separately (3 mm PTFE tubing)
Type options	Single-Layer, Single-Layer with Sampling Port, Jacketed (Double-Layer)
Not included	Electrodes and membrane (sold separately)

Valves are not included in the price. The valve kit for gas purging and vacuum is offered as a separate product (LM-EC-CELL-VALVE) and is ordered together with the cell.

Electrodes and membranes shown in the photos are for illustration only and are not included in the price. Compatible reference, counter and working electrodes and membranes are available in the Electrodes category of our site.

For volumes, dimensions or port layouts other than those listed, you can request a custom-made quotation through the Quotation Form.