Hanna Instruments

Scientific Equipment

Safety Data Sheets

SDS search & quick download

Free Delivery

Most of mainland GB for orders over £50. Other charges may apply - see more

Hanna Care

We take the long view, looking after existing customers as much as delighting new ones!

Certificates of Analysis

Download a copy of the certificate of analysis for your solution

HI-72911B Industrial Use pH Electrode

HI-72911B Industrial Use pH Electrode

Hanna HI-72911B Industrial Use pH Electrode

HI-72911B Industrial Use pH Electrode

£182.40 (exc. VAT) £218.88 (inc. VAT)

The HI-72911B is a titanium body, polymer filled, double reference junction pH electrode with a BNC + phono connector. This flat tip sensing portion of this electrode is made with general purpose glass.

The HI-72911B has a PTFE type junction along with a built-in temperature sensor. This design consideration is ideal for measuring the pH in boilers and cooling towers. The HI-72911B is designed for use with Hanna’s HI-98191 pH meter.

  • Unbreakable Titanium Body
  • Built-In Temperature Sensor for Automatic Temperature Compensation
  • Large Annular PTFE Junction with Increased Surface Area for the Reference Cell
  • HI-72911B Industrial Use pH Electrode information

    Hanna's extended description

    The HI-72911B is a pH electrode with titanium body recommended for use with cooling towers and boilers.

    This electrode is suitable for use with HI-981xx series of meters.

    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 HI-72911B is suitable to use with samples that measure from 0 to 80°C.

    Flat Tip Bulb

    The recessed flat tip bulb of the HI-72911B is easy to clean and prevents solids in solution from collecting on the sensor. Other tip shapes include conic for penetration and spheric for aqueous measurements.

    Titanium Body

    A titanium body increases immunity to electrostatic and magnetic fields. It also allows for strong corrosion resistance, even in seawater.

    PTFE Junction

    Porous polytetrafluoroethylene (PTFE) is a hydrophobic material that is available with different porosities. This type of junction is often used on electrodes with polymer electrolytes. Because of its chemical advantages, PTFE is widely used in industrial applications.

    BNC + RCA Connector

    The HI-72911B uses a BNC + RCA connector. This type of connector is universal in that it can be used on Hanna pH meters that have a female BNC connector for pH and RCA input for temperature.

    BNC Connection – BNC is one of the most commonly used connector types in pH meters and electrodes. Compatible with any meter or electrode that uses BNC connectors.


    Specifications list


    Body Material titanium
    Reference double, Ag/AgCl
    Junction / Flow Rate PTFE
    Electrolyte polymer
    Range pH: 0 to 13
    Max Pressure 3.0 bar
    Tip Shape flat
    Diameter 14 mm
    Body Length / Overall Length 110 mm / 150.5 mm
    Recommended Operating Temperature 0 to 80°C (32 to 176°F) - GP
    Temperature Sensor Yes
    Matching Pin No
    Amplifier No
    Digital No
    Cable coaxial; 1 m (3.3’)
    Connection BNC + phono
    Applications Boilers, cooling towers
    Warranty 6 months

    Questions & Answers

    Got a question to ask? Use this form to submit your question.
    Question will be displayed after moderation.
    Name* Product Question*
    No questions yet?
    Don 't be shy, be the first to ask.