pH & ORP Sensors and Electrodes

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Electrode Glass

pH measurement is all about the glass that makes the sensing tip, and most of the performance aspects of the electrode are directly influenced by the glass formulation. Van London / pHoenix Corporation uses their own glass formulation known as GX-V. GX-V glass provides the following electrode performance specifications:

pH Range: pH 0 to 14 (Na+ <0.1N)

Response Time: 10 Seconds (95% Response) from pH 7.00 to pH 4.01

Glass Membrane Impedance: 20 Mohms at 25 degrees Celcius

In-Line & Submersible Electrodes

Model 821 Model P821 Sensor

Specially designed for convenience of electrode replacement where minimal troubleshooting and maintenance downtime are of prime importance. The P821 is suitable for virtually all applications where a high performance sensor is required, either in-line or submersible installation. The electrode features a detachable cable with an integral preamplifier which eliminates any ground loop problems. The preamp converts the high impedance signal into a stable, noise free signal.

Threaded Body Threaded pH/ORP Sensors

These inline pH and ORP electrodes are designed for mounting on standard 1” or ¾” pipe tees for continuous pH or ORP flow-through monitoring. They are constructed with a sealed solid polymer reference which requires no pressurization or refilling during use. With the large reference surface area, reference clogging is not a problem.

Model P721 Sensor

Designed for in-line mounting or submersible using a probe holder, these are a good general purpose electrode.

Tuff-Fet Tuff-Fet & Transmitter Non-Glass pH Electrodes

The Tuff-Fet™ sensor is a solid state, ion selective field-effect transistor or ISFET. This technology does not require a glass membrane, making it perfect for Food-Grade Applications.

Twist Lock Twist-Lock Series For pH Or ORP Applications

The Twist-Lock™ sensor and adapter is designed to convert a standard pipe tee into a low cost, low maintenance flow-through sensor assembly. Only a ¼ turn is required for field maintenance or sensor replacement; threading is eliminated. The adapter is available in a variety of materials & connection sizes for easy installation.

Differential Differential Series pH-ORP Sensors 

The Differential Series pH/ORP sensors have a glass reference system which allows the sensor(s) to be used in applications that poison conventional pH or ORP sensors.


Bio Tech

Fermprobe Fermprobe® Type Replacements pH/Redox Electrodes

This series of steam sterilizable and autoclavable pH electrodes and ORP electrodes has been designed to retro-fit the Broadley James Corp. FERMPROBE® ELECTRODE HOLDER.  These electrodes have been engineered as improved replacements using the same configuration as the original equipment.

Micro Autoclavable Micro Autoclavable Electrodes

This series of miniature steam sterilizable, combination pH and redox electrodes are designed for small bench top fermentors and culture apparatus. The electrodes are designed to fit all 12mm and 6mm electrode holders or rubber stoppers used in bench top fermentors.

Refillable Refillable pH and ORP Electrodes

This series of steam-sterilizable pH and ORP electrodes are designed for small fermentors where sterilization is performed in an autoclave in non-pressurized operation. The electrodes can withstand repeated sterilization up to 130°C and feature a detachable cable assembly insulated with a water tight connector.

Fermentation Sealed In-Situ Sensor For Fermentation

This new generation, low cost, steam sterilizable insertion sensor is specifically designed for low maintenance requirements.   The assembly is low profile and features an easily replaceable, sealed, combination pH or ORP electrode.



Laboratory Laboratory Electrodes

Van London-pHoenix Co. Laboratory electrodes are designed to be used in a variety of applications. These include water quality, soil pH, non-aqueous media, and education. Both glass and plastic body types are available.

Titration Titration Electrodes

The Van London-pHoenix Co. Titrate electrodes are specially designed for all existing Brinkmann, Metrohm and Schott titration systems. The electrode body is constructed with a glass ground joint that will fit their titration vessels.

Tuff-Tip Tuff-Tip Laboratory pH

The Tuff-Tip® is a robust alternative to the conventional laboratory pH electrodes where membrane breakage is a problem.
The Tuff-Tip® is compatible with almost all pH meters.


Direct Replacement Electrodes

Hach ABB (TBI) Replacements

This series of Van London-pHoenix pH and ORP sensors are designed to retrofit the TBI/Bailey sensor assemblies. They are manufactured with a unique solid polymer reference gel for extended life in the most severe applications.

Sensorex & Signet Endress + Hauser® Direct Replacements

This new line of direct replacements for E&H®-style electrodes is now available for a wide variety of pH or ORP applications. They are designed dimensionally to retrofit with existing installations. Expensive equipment changes are no longer necessary.

Invensys Hach® (Great Lakes)

Van London-pHoenix Co. electrodes are manufactured with our Solid Polymer Reference™ fill, the life of the electrode is prolonged and the overall performance of the electrode is enhanced.

Mettler Honeywell (L&N)

Van London-pHoenix Housings can be machined from numerous materials with several electrode guard designs and various insertion depths. Custom electrode designs can maximize sensor in harsh environments.

Honeywell Invensys (Foxboro)

Van London-pHoenix Co. electrode designs have been field proven in a variety of harsh applications. Replacement sensors are dimensionally matched to existing equipment so that no expensive retrofit changes are necessary.

Yokogawa Mettler (Ingold®) Direct Replacements

This new line of direct replacements for Mettler Ingold®-style electrodes is now available for a wide variety of pH or ORP applications. They are designed dimensionally to retrofit with existing installations. Expensive equipment changes are no longer necessary.

ABB Rosemount® Replacements

Van London-pHoenix Co. Rosemount® pH replacement sensors have been field proven in a variety of harsh applications. An inventory stocking arrangement reduces lead times from weeks to days. Housed electrodes generally consist of two parts: a 12mm glass-bodied electrode and housing machined to accept that electrode. Minimal factory assembly is required before shipment to the customer site.

Live Tap Sensorex® & Signet® Replacements

The low profile design allows the process flow to clean the pH / ORP sensor tip, and with the addition of the Van London-Phoenix Co. Tuff Tip™ the bulb is protected from physical damage.

E&H Yokogawa® Replacements

Van London-pHoenix Co. Yokogawa pH and ORP electrode replacement designs have been field proven in a variety of harsh applications. In most cases, direct replacements will outperform original equipment specifications.


H2O Rx Pty Ltd


+61 409 784 236


Last Updated: 30 June, 2017