Hanna Instruments Australia
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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Gel Filled ORP Electrode with Gold Contact and BNC Connector - HI4430B

$412.02

The HI4430B is a PEI body, single junction ORP electrode with a BNC connector. This electrode has a single ceramic junction in the outer reference cell and the ORP sensing pin is made with gold. This design consideration is ideal for ORP measurements of ozone and applications with other oxidants.

Durable PEI Body

Gel Electrolyte

Gold Sensing Pin

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 HI4430B uses a gold pin, PEI body, single ceramic junction and gel electrolyte.

Gold Pin

Gold Sensing Pin

The HI4430B ORP sensor is made with gold. An ORP sensor must be chemically inert; it cannot be oxidized 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: platinum and gold. Pure platinum and pure gold are both used in the construction of ORP sensors. The gold sensor signal is carried through the electrode body, and together with the reference signal is conducted to the measurement meter.

PEI Body

PEI Body

The body of the HI4430B is composed of polyetherimide (PEI) resin. The PEI body is suitable for a wide range of applications and excels in field measurements due to its durability. The shielding around the spherical glass tip minimizes breakage due to accidental bumping or dropping of the electrode. The PEI plastic is a high quality plastic that is chemically resistant to many aggressive chemicals.

Ceramic Junction

Single Ceramic Junction

The outer junction of an electrode, also known as a salt bridge, is necessary component of the electrical circuit. The movement of ions must flow through the junction for a steady reading. The outer reference has a single ceramic frit. The ceramic is a porous material that is easily fused with the glass body and has a similar expansion coefficient. A single ceramic junction has a flow rate of 15-20 μL/hour. Other junction types are available with higher flow rates and made with different materials.

BNC connector

BNC Connector

The HI4430B 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.

SKU HI4430B
Name Gel Filled ORP Electrode with Gold Contact and BNC Connector – HI4430B
Measurement Range ORP: ±2000 mV
Reference Cell Type single, Ag/AgCl
Junction Type/Flow Rate ceramic, single
Type of Electrolyte gel
Body Material PEI
Tip / Shape gold pin
Matching Pin no
Max. Pressure 2 bar
Temperature Operating Range -5 to 70°C (23 to 158°F)
Body Length/Overall Length 120 mm / 163.5 mm
Temperature Sensor no
Outer Diameter 12 mm
Cable coaxial; 1 m (3.3’)
Connector Type BNC
Amplifier no
Recommended Use oxidants, ozone

Gel Filled ORP Electrode with Gold Contact and BNC Connector – HI4430B

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.


Free standard delivery:

We offer free delivery within Australia, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient’s location.


Same-day express delivery:

Place your order before 1 PM Monday to Friday for the same-day express shipping. Delivery times may vary depending on the courier service and the recipient’s location.

Please note that we do not offer shipping to PO Box addresses.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Please note that we do not offer shipping to PO Box addresses.