About us

Who we are…

TJB Systems Ltd was founded over 20 years ago. Its main core business has been steam test equipment, although we have dabbled and still engage in contract electronic design and programming.
A bit of history …

What we do…

We teamed up with Keith Shuttleworth & Associates Ltd to supply hospitals and pharmaceutical companies the world over with steam testing equipment.

Very proud that even our earliest equipment is still in use today. We still support, maintain and service equipment after all these years. Preferring to keeping equipment running than discarding them to the scrap heap.


Our Mission…

We are now embarking on the next adventure. Steam Quality Innovations.

Taking steam quality testing to the next level.

Our Story

Steam quality testing for sterilizers was first introduced back in the 1970’s as part of the NHS HTM documentation. The equipment developed was based around what they thought most hospitals would have available to them. It was to say the least crude and very basic. You needed great care and luck to be able to get accurate repeatable results. Unfortunately the equipment set up defined in the regulations has remained unchanged since.

While using the antiquated set up in the late 1990’s we said. “This system is very unreliable, we can do better.”

And that was the start of the SQ series of test equipment.

We developed the kits based around real world needs. With a very knowledgeable understanding of the requirements of what a test engineer needs.

As it turns out we were the first to develop the new system and bring it to market.

The SQ1P has been in production since then. It has established itself as the de facto standard that other equipment are compared against.

Since then we have improved the equipment to make the test engineers life even easier. No longer do you need to source large amounts of cooling water. The SQ1E is an air cooled system. It comes complete in a compact portable case that enables you to easily transport the equipment to site, and then use the case and included stand to set up and start testing with the minimum of fuss.

Over the last few years we have been busy, spending many £1000’s on R/D and developing new products.

Our latest is the SQI-TM1, a high quality dual input PT100 temperature meter. Like all our equipment it was designed from an engineer’s perspective. It includes a large screen, robust probes and leads and a dedicated test feature that will record all the vital figures and save them for use later. No more fumbling with pens and paper halfway up a ladder. It can also produce a graph enabling easy diagnosis of issues.

To complement the SQI-TM1 we developed the SQI Test and Report app.

Available on Android and Windows the software seamlessly links to the SQI-TM1 to capture all the important temperatures. The software also enables you to capture all the other test data and calculate the results.

The SQI Test and report software as the name suggests will take that data and in a few clicks produce reports to your format. The SQI-TM1 and the Test and report apps are a game changer for the industry.


Timothy Box - MD - circular portrait

Timothy Box


After an apprenticeship in Johnson Matthey, Tim joined the NHS working as an engineer in local hospitals. Then moving into a Sterile Services Department, in charge of the boilers and sterilizers. The job kept him busy at both ends of a sterilizer. Gaining valuable first hand understanding of the technical and the user aspects of sterilization. Something he values to this day. After moving into the pharmaceutical industry he saw a business opportunity in the newly emerging market for steam test equipment. As a product designer he has designed many products used in a diverse range of industries from Automotive to the Pharmaceutical industry

Debbie Box - Company Secretary - circular portrait


Company Secretary

Multitasking wonder woman. Holding down many jobs including our Accounts

Gabi Mihaila - R&D - circular portrait

Gabi Mihaila

Head of R/D and Software Development

Gabi started his career as an Radio Officer onboard merchant ships then he decided to continue in telecommunication and joined ERICCSON on Fiber Optics projects Since then, Gabi gained more than 12 years experience in Telco industry. Since 2004 he started with micro-controller firmware development and hardware design for various electronic devices.  He is responsible for the implementation of certain projects electronic CAD/CAM design, firmware development and software integration.