pH Electrode for use with HI207 and HI208


The HI1291D is a PEI body, single ceramic junction pH electrode with a DIN connector for use with the HI207 and HI208 pH meters.This design consideration is ideal for general laboratory use.

•  Great for general purpose laboratory and education use
•  Made for use use with the HI207 and HI208 pH meters
•  No need to refill electrolyte.

  The HI1291D uses general purpose (GP) glass, spherical bulb, polyetherimide (PEI) body, single ceramic frit, and double junction.
General Purpose Glass Formulation
•  The measurement of pH at very high temperatures is detrimental to the sensitive glass bulb and will shorten the life of it.
•  A pH electrode with general purpose (GP) glass will have a resistance of 100 megaohms at 25°C while the resistance of LT glass is around 50 megaohms at 25°C.
•  As the temperature of the glass decreases in the sample, the resistance of the LT glass will approach that of GP glass.
•  If using GP glass, the resistance would increase above the optimum range, resulting in increased impedance and ultimately affecting the measurement.
•  The HI1291D is suitable to use with samples that measure from 0 to 70°C.

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

  PEI Body
•  The body of the HI1291D 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.

  DIN Connector
•  The HI1291D uses a DIN connector.
•  This type of connector is made only for the HI207 and HI208 pH meters.
•  Other type of connectors include BNC, 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.


    Description                                :  pH electrode
    Measurement Range                  :  pH: 0 to 13
    Junction Type/Flow Rate           :  ceramic, single
    Type of Electrolyte                    :  gel
    Body Material                            :  PEI
    Tip / Shape                               :  spheric (dia: 5.0 mm)
    Max. Pressure                            :  2 bar
    Temperature Operating Range   :  0 to 70°C (32 to 158°F) – GP
    Temperature Sensor                  :  yes
    Cable                                        :  coaxial; 1 m (3.3’)
    Connector Type                         :  DIN
    Amplifier                                   :  yes
    Recommended Use                   :  general purpose

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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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