The HI-3131B is a refillable combination ORP electrode for laboratory use and ORP titrations. This electrode has a BNC connector and 1m cable. This electrode has a single ceramic junction as part of the reference cell and a platinum ORP sensing pin. This design consideration is ideal for laboratories and general purpose ORP measurements, as well as for use as an indicating electrode in ORP titrations.

• Refillable electrode
• Single ceramic junction
• Platinum pin