Lab Unlimited UK

The Carl Stuart Group was founded in 1984 by Stuart and Gillian Smith. From a small beginning our business has grown to encompass many services and products, covering different market sectors and geographical regions. The focus of our business, however, remains the same. We are a customer orientated company and strive to meet and exceed your expectations in everything we do.

As our portfolio grew we decided to present and promote our product and technical service offerings under distinct brands.  The Laboratory instrumentation, consumables and technical & integration services are promoted under Lab Unlimited.

The Lab Unlimited product portfolio offers laboratory/analytical products from more than four hundred leading manufacturers. A substantial part of this offering is published on this very site. We also produce a printed catalogue that can be requested by emailing us.

How YSI Sensors Work for in-situ Water Testing

How YSI Sensors Work for in-situ Water Testing

Watch a webinar series, made in partnership with Cleveland Water Alliance, covering the principles and practices in water quality monitoring, regarding YSI's Algae, Turbidity, Conductivity, pH & ORP, as well as Dissolved Oxygen sensors.

The Cleveland Water Alliance and YSI, a Xylem brand, created a 5-part educational webinar series on sensing technologies, for everyone working with water quality monitoring, from students and undergraduates to professionals.


The series covered the principles and practices of water quality monitoring, focusing each session on a different parameter: Algae, Turbidity, Conductivity, pH, Oxidation Reduction Potential (ORP), and Dissolved Oxygen.

In each webinar, an expert from YSI described why and what it is important to monitor for each parameter, how monitoring technologies for that parameter have evolved, and the underlying principles of how they work.

Also, real-world examples were presented, to showcase how each sensor type operates in practice, revealing benefits or limitations that all users should understand and be aware of.


Couldn’t attend the live presentations? No problem!


The live webinar series has now ended but you can still watch the recordings to learn more about how each different sensor works. Simply click the one you are interested in, to see the recording on the YSI website.

How Algae Sensors Work | June 11, 2019

How Turbidity Sensors Work | July 9, 2019

How Conductivity Sensors Work | August 6, 2019

How pH & ORP Sensors Work | September 10, 2019

How DO Sensors Work | October 8, 2019

Would you like to know more information regarding the YSI Sensors we have available? Be sure to check out our website or contact our Sales Team. We will be happy to help you with your queries.

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