The absolutely sealed straight five-port cell is designed for oxygen- and moisture-sensitive measurements. The electrodes plug into socket connections inside the stainless-steel lid, so no air enters through the electrode feedthroughs.

Gas purging and vacuum are done through two valves on the lid; the valve connected to the sparger is the inlet. A sintered salt bridge or Luggin capillary cannot be added to this cell; a matching Ag/AgCl electrode is used as the reference (manufacturer data). For pressurized operation the cell bottom must be round.

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.

In the jacketed (double-layer) version an outer water jacket surrounds the inner cell. Water from a circulating thermostatic bath flows through the jacket via hose connections and keeps the electrolyte at a constant temperature during the measurement. Because the inner glass of the jacketed body is thinner, do not pressurize this version; vacuum and gas purging can be used.

Key Features

Jacketed (double-layer) body: constant electrolyte temperature with a circulating bath
Absolute sealing with socket (jack) electrode connections
Vacuum (below −100 kPa) and gas purging through valves
Sparged gas inlet; slight overpressure possible (≤0.5 MPa)
Nine volumes from 10 mL to 1000 mL
Used with an electrode set made to fit the cell

Technical Specifications

Cell type	Single chamber, absolutely sealed
Temperature control	Water jacket for a circulating thermostatic bath
Body	Borosilicate glass 3.3
Electrode connection	Socket (jack) in the lid, plugged in from inside
Vacuum / pressure	Below −100 kPa; max. 0.5 MPa (round-bottom body, manufacturer data)
Reference	Matching Ag/AgCl (no salt bridge / Luggin)
Volume options	10 mL, 30 mL, 50 mL, 100 mL, 150 mL, 200 mL, 250 mL, 500 mL, 1000 mL
Not included	Electrodes (sold separately)

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.