Refillable Double Junction pH Electrode with BNC Connector For Fluoride Applications


The HI1143B is a glass body, refillable, double junction pH electrode with a BNC connector. This electrode has a single ceramic junction in the outer reference cell and the pH sensing portion is made with fluoride resistant glass.

This design consideration is ideal for samples with fluoride.

•  Double Junction Design
•  Fluoride Resistant Glass
•  Refillable Electrode

  The HI1143B uses Fluoride Resistant (HF) glass, spherical bulb, glass body, single ceramic frit, double junction and is refillable with 3.5M KCl.
Fluoride Resistant Glass Formulation
•  The measurement of pH in samples containing fluroide is detrimental to the sensitive glass bulb and will shorten the life of it.
•  HF resistant glass is designed for use in aggressive applications that have fluoride ions for extended life.

  Spherical Bulb
•  The spherical bulb is for general purpose use.
•  Other tip shapes include conic for penetration and flat tip for surface measurements.

  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 electrode reaches equilibrium, the steadier the reference potential.

  Single Ceramic Double Junction Reference
•  The HI1143B is a double junction design. pH electrodes are available as single junction or double junction.
•  The junction 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.

•  The HI1143B is a refillable probe.
•  Since it is a double junction pH 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.

  BNC Connector
•  The HI1143B has 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.


    Body Material                          : glass
    Reference                                : double, Ag/AgCl
    Junction / Flow Rate               : ceramic, single / 15-20 μL/h
    Electrolyte                               : 3.5M KCl
    Range                                     : pH: 0 to 10
    Max Pressure                           : 0.1 bar
    Tip Shape                               : spheric (dia: 9.5 mm)
    Diameter                                 : 12 mm
    Body Length / Overall Length  : 120 mm / 175.5 mm
    Recommended Operating

Temperature                            :

-5 to 60°C (23 to 140°F)
    Temperature Sensor                : no
    Matching Pin                           : no
    Amplifier                                 : no
    Digital                                     : no
    Cable                                      : coaxial; 1 m (3.3’)
    Connection                             : BNC
    Applications                            : strong acid and base
    Warranty                                 : 6 months

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To make your order, please contact us at  info@polyscientific.com.my or call us at +6 06 3350 690

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