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Glass Body General Purpose Reference Electrode Hanna Instruments HI5311

Product Information

Manufacturer: Hanna Instruments
Model: HI5311
Warranty: 12 months

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Description

The HI3131B is a glass body, refillable, single junction ORP electrode with a BNC connector. 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

Refillable Electrode

Double Reference Junction

Single Ceramic Junction

Platinum Sensing Pin

Platinum Pin
Hanna Instruments offers a wide variety of pH electrodes that are designed for many different applications. The type of glass used, body material, type of junction, type of reference and electrolyte used are just some of the design considerations.
The HI5311 uses a glass body, single ceramic junction and is refillable with 3.5M KCl.
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.
Single Ceramic Outer 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.
Refillable
The HI5311 is a refillable reference electrode. Since it is a double junction electrode the fill solution is the HI7082 3.5M KCl. This solution does not contain any silver as with single junction electrode. The absence of silver will prevent any silver precipitate from forming at the junction surface and clogging it. Clogging of the junction will result in drifty and erratic readings.
4 mm Connector
The HI5311 uses a 4 mm banana connector. This type of connector is easily plugged into the reference input on suitable meters. Other type of connectors include BNC, 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.

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Thông số kỹ thuật

Reference Cell Type	double, Ag/AgCl
Junction Type/Flow Rate	ceramic, single / 15-20 μL/h
Refill Electrolyte	3.5M KCl
Body Material	glass
Max. Pressure	0.1 bar
Temperature Operating Range	-5 to 100°C (23 to 212°F)
Outer Diameter	12 mm
Cable	1 m (3.3′)
Connector Type	4 mm banana
Recommended Use	general purpose