HI12973 is a titanium body, gel-filled, single reference junction pH electrode with a quick DIN connector. The sensing part of this electrode is made of general purpose glass. HI12973 also features a cloth junction and a built-in temperature sensor and amplifier in a single probe design. This design consideration is ideal for measuring pH in municipal and industrial wastewater, swimming pools, and various field applications. HI12973 is designed for use with Hanna's HI991002 and HI991003 pH meters.

Titanium Body

Built-in temperature sensor

Cloth Junction

• Hanna Instruments offers a variety of pH electrodes designed for many different applications. The type of glass used to sense pH, bulb shape, body material, junction type, reference type, and electrolyte used are just some of the design considerations.

• HI12973 uses general purpose (GP) glass, a spherical bulb, a titanium body, and a cloth junction with gel electrolyte.

General Purpose Glass Formulation

As the name implies, general purpose (GP) glass is a standard glass formulation used for general purpose. A pH electrode with GP glass has a resistance of 100 megohms at 25°C and is suitable for measuring the pH of samples at ambient temperature. HI12973 is suitable for samples from 0 to 80°C.

Spherical Bulb

The spherical bulb is general purpose. Other tip shapes include conical for penetration and flat tip for surface measurements.

Titanium Body

The titanium body enhances immunity to electrostatic and magnetic fields. It also has strong corrosion resistance, even in seawater. The outer titanium electrode housing also serves as a matching pin. The matching pin is a differential measurement technique used to eliminate ground loops and common mode disturbances in the measurement system. In systems without a matching pin, currents in the sample can affect the reference half-cell voltage. The matching pin isolates these currents/magnetic fields from the reference electrode for safe, accurate pH measurement.

Cloth Junction

Cloth or fiber wick junctions provide a larger surface area than standard ceramic junctions. This is useful when measuring the pH of liquid samples with high solids content.

Quick DIN Connector

HI12973 uses a quick DIN connector. This type of connector is usually a proprietary connector for the meter provided and may not be interchangeable. Other types of connectors include BNC, screw-type, T-type, and 3.5 mm, etc.