Our REF-12-0-A is an external reference electrode. It is not integrated in a soil Redox probe. It can be used in combination with our B-type analog soil Redox probes (e.g., ORP-30-1-B, ORP-40-4-B and ORP-80-4-B).
The advantage of an external reference electrode is that maintenance can be performed on the reference electrode (e.g., refilling the reference electrode with 3 M KCl gel) without retrieving the soil Redox probe(s) from the soil/sediment. The REF-12-0-A can be placed directly in the soil/sediment or in a (ground)water well, located near the soil Redox probe(s).
The REF-12-0-A can be used for both handheld and standalone (with datalogger) Redox measurements.
For handheld measurements it can, for example, be connected with a banana jack and adaptor (BNC to 2 x banana jack) to the Lutron YK-23RP mV meter together with a B-type analog soil Redox probe (e.g., ORP-30-1-B, ORP-40-4-B and ORP-80-4-B).
For standalone measurements it can be connected to a datalogger with an input impedance ≥ 10 Giga Ohm. One reference electrode can be used together with multiple soil Redox probes to perform Redox measurements in a monitoring network. We advise to use 2 reference electrodes. By monitoring the potential difference between the 2 reference electrodes, it can be determined when maintenance of the reference electrodes is necessary. See our soil Redox probe manual for suggestions for datalogger connections.
The reference electrode contains a harmless 3 M KCl gel for long-lasting soil Redox measurements. For more information see Electrolyte-100.
For more information, please contact us at email@example.com.