Gel Filled ORP Electrode with Gold Contact and BNC Connector

HI4430B

Gel Filled ORP Electrode with Gold Contact and BNC Connector

$229.99

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

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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 the 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 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

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. PEI plastic is a high-quality plastic that is chemically resistant to many aggressive chemicals.

Single Ceramic Junction

The outer junction of an electrode, also known as a salt bridge, is a 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

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 types 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.

Keep extra testing supplies on-hand

HI547-11PB General pH Calibration Bundle, pH 4 & 7 (Bottles) $77.99

HI5710-11PB General pH Calibration Bundle, pH 7 & 10 (Bottles) $77.99

HI64710-11 Laboratory Calibration Bundle $154.99

HI54710-11 pH 4.01, 7.01 and 10.01 Technical Calibration Solutions with Electrode Storage Solution and Cleaning Solution (5 x 500 mL) $119.99

Resources

Specifications

Specification Name	Detail
SKU	HI4430B
Description	gel-filled, combination ORP electrode w/ gold contact
Reference	single, Ag/AgCl
Junction / Flow Rate	ceramic, single
Electrolyte	gel
Max Pressure	2 bar
Range	ORP: ±2000 mV
Recommended Operating Temperature	-5 to 70°C (23 to 158°F)
Tip / Shape	gold pin
Temperature Sensor	no
Amplifier	no
Body Material	PEI
Cable	coaxial; 1 m (3.3’)
Recommended Use	oxidants, ozone
Connection	BNC