Walchem WEL pH / ORP Electrodes

Walchem Intuition-9

WEL Series electrodes are cost-effective differential pH and ORP electrodes for industrial applications

Key benefits:

Modular in design with a rugged CPVC housing that contains the electronics; to which the pH and ORP cartridges can easily be connected or replaced in minutes without tools. The cartridges feature a unique threaded interlock connection and a double o-ring seal, ensuring a watertight fit and secure seating at all times.
  • Differential preamp
  • Universal mounting, easy to install
  • Easily replaceable electrode cartridges
  • Electronics are not discarded with the electrode
  • Optional ATC
  • Cartridge styles:
    • Flat surface
    • Bulb/rod
    • HF resistant
    • Low ionic strength pH cartridge
  • Resistant to electronic noise, ground loops
  • CE performance & safety certifications


Typical applications:

  • Bottle washing
  • Wastewater treatment
  • RO systems
  • Storm water
  • Cooling towers
  • Boilers
  • Fruit & veg processing
  • Drinking water
  • Pulp & paper
  • Metal finishing
  • Swimming pools
  • Hydrotherapy

Related products

  • Sensorex pH/ORP systems
    Digital communication for more process visibility

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Custom build solutions

Redefine simplicity and flexibility in cooling tower solutions with our plug-and-play service that delivers rapid installation.

We offer standard layout that serves as a solid foundation but we can be customise to meet the unique needs of any client site. We tailor the build to achieve optimal performance.

Our custom builds are popular as a comprehensive solution that's wired and seamlessly integrated meeting any site requirements. Email us today to learn more about our bespoke custom built solutions to speed up your installation and reduce operation or project downtime.


We specialise in delivering tailored product training to empower your team and enhance operational efficiency. Whether you prefer on-site sessions, at your company's location or the convenience of video conferencing, we've got you covered.

Our focus revolves around installation best practices, ensuring seamless product connectivity, and optimising maintenance procedures. Take the first step towards maximising your team's potential. Email us today to learn more about our bespoke training offerings, check availability, and embark on a journey to enhance your team's expertise.

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Sensys Ltd

Head Office
24 Vision Park
Preston Place
Upper Caldecote
SG18 9GQ

what3words: ///uptown.wisley.guests

01438 759 595

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