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HI-3133B ORP Half-Cell Electrode, Glass Body, Refillable

HI-3133B ORP Half-Cell Electrode, Glass Body, Refillable

Hanna HI-3133B ORP Half-Cell Electrode, Glass Body, Refillable

HI-3133B ORP Half-Cell Electrode, Glass Body, Refillable

Ideal for general laboratory use
6 months warranty
£197.50 (exc. VAT) £237.00 (inc. VAT)

The HI-3133B is a glass body ORP half-cell electrode with a BNC connector. This sensing electrode is made with a platinum pin and is to be used in conjunction with a reference half-cell electrode. This design consideration is ideal for use in ORP titrations as well as for general purpose measurements.

  • Half-Cell Design
  • BNC Connection
  • Platinum Pin
  • 1m cable
  • HI-3133B ORP Half-Cell Electrode, Glass Body, Refillable information

    Hanna's extended description

    Hanna Instruments offers a wide variety of ORP electrodes that are designed for many different applications. The type of material used for the sensing pin, type of glass used for body material, type of junction, type of reference and electrolyte used are just some of the design considerations. The HI-3133B uses a platinum pin and glass body.

    Platinum Sensing Pin

    The HI-3133B ORP sensor is made with platinum. An ORP sensor must be chemically inert; it cannot be oxidised or reduced itself. It must also have the proper surface characteristics to promote rapid electron exchange, a property known as high exchange current density. Two noble metals have proven to work well for this purpose: pure platinum and pure gold are both used in the construction of ORP sensors. The platinum sensor is often preferred because it is mechanically simpler and safer to produce. Platinum can be welded to glass and has the same thermal coefficient. The platinum sensor signal is carried through the electrode body, and together with the reference signal is conducted to the measurement meter.

    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.

    BNC Connector

    The HI-3133B uses a BNC connector. This type of connector is universal in that it can be used on any pH meter that has the female BNC probe input. Other type of connectors include DIN, screw type, T-type, and 3.5mm to name a few. These types of connectors tend to be proprietary for a particular type of meter and are not interchangeable.

    BNC Connection – BNC is one of the most commonly used connector types in pH meters and electrodes. Compatible with any meter or electrode that uses BNC connectors.

    All electrodes and probes have 6 months warranty. See our warranty and returns policy explained.


    Specifications list


    ORP Half Cell Platinum
    Range mV; 20 to 40°C (68 to 104°F)
    Connector BNC
    Tip Shape Platinum pin
    Body Material Glass
    Cable Coaxial

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