7c23457e

Service Engineer joins JTS Team

Fri, 17 Oct 2025 06:31:12 GMT

We’re excited to welcome Alan Phillips to our service team. Alan joined us this summer and has already been making a big impact, helping customers get the very best out of their test chambers. ��
At JTS, we know that regular servicing is the key to keeping your equipment reliable, accurate, and compliant. That’s why we offer a comprehensive Service Package designed to:
✅ Extend equipment lifespan
✅ Prevent costly breakdowns
✅ Maintain testing accuracy & compliance
Our expert technicians provide:
�� Full functional checks
�� Calibration & performance verification
⚙️ Replacement of worn parts
�� Detailed service reports
With JTS, you get fast, efficient service from specialists who know your chambers inside out — so you can keep operations running smoothly with minimal downtime.
�� Ready to book your service?
Drop us a message or get in touch today for your quotation andrea@jts-test-chambers.co.uk

If you have any chamber requirements, please feel free to contact Rich on any of the details below

Richard Lewis – Sales Director – richard@jts-test-chambers.co.uk

Mobile – 07535 426129

Office - 01874 711209

MP for Brecon, Radnor and Cwm Tawe David Chadwick

Fri, 19 Sep 2025 10:24:01 GMT

James Technical Services Limited having been involved in electric car, battery development and testing over the past 7 years have now installed two 11kW charging points at the factory in Talgarth mid Wales. These points can be used by customers and employees ��

JTS have always been following the progress of the battery development and have purchased their first electric vehicle which will be used by the employees to carry out sales / site visits.

The container test chamber below is used by various car manufacturers for electric vehicle battery testing. This is just one example of a battery testing facility JTS can supply.

If you have any chamber requirements, please feel free to contact Rich on any of the details below

Richard Lewis – Sales Director – richard@jts-test-chambers.co.uk

Mobile – 07535 426129

Office - 01874 711209

Electrical Design Engineer

Gillian@jts-test-chambers.co.uk — Mon, 14 Jul 2025 15:18:29 GMT

Want to find out more ? https://www.workwales.co.uk/vacancies/ce1bed74-58dd-456d-9d77-b4f7e1c28b15

Talgarth Town Football Club

Tue, 15 Oct 2024 09:50:47 GMT

JTS were asked by local councillor William Powell to help out refreshing a storage container used by Talgarth Town FC juniors and ladies.

After some initial discussions and a quick cad mock up to agree the paint scheme the JTS team began to work on the project. This happened with the help of the Black Mountains College (Power) and Talgarth Building Supplies (Paint) and the JTS workforce.

As you can see the container has had a new lease of life and we hope the guys using the container like the paint work!

‘Good news TTFC under 10’s celebrated a home victory with the team having a photo and the container used as a back drop!’

If you have any environmental test chamber requirements, please feel free to contact JTS on the any of the details below

sales@jts-test-chambers.co.uk

Office - 01874711209

Electric Vehicle Charging at JTS

Mon, 22 Jul 2024 15:24:38 GMT

JTS have always been following the progress of the battery development and have purchased their first electric vehicle which will be used by the employees to carry out sales / site visits.

The container test chamber below is used by various car manufacturers for electric vehicle battery testing. This is just one example of a battery testing facility JTS can supply.

If you have any chamber requirements, please feel free to contact Rich on any of the details below

Richard Lewis – Sales Director – richard@jts-test-chambers.co.uk

Mobile – 07535 426129

Office - 01874 711209

JTS transfers to Employee Ownership

Tue, 30 Apr 2024 15:46:54 GMT

Welsh engineering company transfers to Employee Ownership

JTS Ltd is the only environmental chamber manufacturer in Wales, and one of very few remaining in the UK. With owners Glen and Sue James looking to step back, solutions were sought to enable the business to continue and evolve.

The proposal to transfer the Company to an Employee Ownership Trust was met with unanimous approval. With the support of Employee Ownership Wales, the move will enable the continued employment of a skilled and committed team.

New Managing Director, David Hunter, is looking forward to implementing plans for further developing the business, including offering apprenticeships, for the benefit of all employees.

He said “This is a fantastic opportunity for the skilled and loyal staff to have an investment in their future, the future of the business and build on the outstanding success of the first 28 years at JTS. I look forward to working with the team here who have all fully embraced the EOT process and all of us taking the business to the next stage of development. The support at Cwmpas has been invaluable to everyone involved in this process and they have helped and guided us all through to the final completion. I would recommend all companies to look at this option as there are no negatives and only positives for all concerned.”

Maximising test load capacity

Wed, 01 Feb 2023 16:42:57 GMT

An issue faced by many customers is how to achieve the most test capacity without impacting on chamber performance. Putting the maximum test load in and still achieving even distribution and stability is a challenge when building bespoke equipment.

Airflow is key and having a good understanding of how a customer will load their product ensures the best results are achieved.

For one JTS customer who’s test cycle lasts several months, incorporating steady slow ramps and long dwells, humidity distribution is critical. For them the distribution accuracy is so paramount the chamber is regularly calibrated using the 9 point mapping system. One probe is placed in each corner just away for the chamber wall and one in the centre, the allowable tolerance in this scenario is 2% rh. During tests if the humidity fluctuates out of specification in any area of the chamber, the test is aborted.

Bespoke racking can help resolve distribution issues and the rack on this recent project was built to ensure good even air flow and ensure stability.

With a temperature range of -20°C to +80°C and a humidity range of 20 to 98% the chamber spends a lot of time testing at high temperature and high humidity, over 95%. These conditions are harsh, so the test frame was built of stainless steel and to enable easy product loading, sliding compartments were incorporated in the design.

Fully loaded this racking weighs around 600kg, so a reinforced chamber floor was essential.

Reliability of chambers that do long term testing is essential, down time causes testing backlogs and unwanted stress. Time spent understanding what is required of a chamber and how it is going to be used, ensures JTS get the design and build correct.

This in turn enables us to keep to our mission, to design and build robust, innovative solutions for our customers - something to rely on.

Rising To The Challenge

Wed, 07 Sep 2022 19:44:13 GMT

The evolving test requirements for Electric Vehicle battery packs means test specifications are constantly being pushed to new boundaries. JTS has risen to these challenges with our range of containerised test chambers. With extensive experience in the design and build of reliable high-performance bespoke environmental test chambers we provide solutions to large multi-national companies, both here in the UK and overseas.

JTS has an ethos of working closely with customers and this proved invaluable with a recent design brief for a containerised test facility. The build specification required a temperature controlled test chamber, an office area for engineers and an area for refrigeration plant and the customer’s chiller.

Our design utilises a 30ft tunnel container with an additional personnel door for access to the office. A side window introduces natural light to the office and louvre panels facilitate a flow of fresh air through the plant area.

The 2m x 4m test area provides a controlled environment over a range of +20°C to +40°C, with capacity for test loads dissipating up to 10kw. The ceiling mounted air handling unit is fitted with a fan speed controller, allowing the customer to control the airflow within the chamber. A bunded anti-slip floor enables safe containment of any spilt test fluids, up to a depth of 100mm. Access for loading is via double doors at one end of the container and a fire rated personnel door gives access from the office. An array of IP65 rated 230V and 400v sockets are fitted either side of the test area for customer use.

For safety a 60 minute fire rated bulkhead is incorporated between the chamber and the 2m x 3.5m office area. Laminated insulation panels line this area and an aluminium anti-slip floor gives a clean bright working environment. Further enhancements include air conditioning, continual fresh air purge and emergency LED lighting.

The plant room at the end of the container houses a Bitzer Ecolite air cooled condensing unit and the cooling plant for the air conditioning system. Free space is also allocated in this area for the customer’s test load chiller and their Statx fire suppression system.

There will never be one design that fits all scenarios of testing. From containers to walk in rooms, floor standing to bench mounted, our wealth of experience and continuous product development enables JTS to engineer bespoke solutions.

Complex Installations

Wed, 13 Jul 2022 19:40:28 GMT

One of the exciting things about the work we do at JTS is the fact that no two projects are the same.

Customer needs can be varied and sometimes the solution seems impossible, but most are issues that can be resolved, especially if JTS are invited into discussions at the early stages of a project.

We have worked through an extensive list of site complication over the course of supplying chambers all over the UK – few are new to us.

The photos shown here were a project that involved installing a walk-in room on the first floor of the customers building, but the plant unit needed positioning on the roof of the building.

Obviously that element of the job was outside JTS areas of expertise, but we found a lifting specialist in the area that meant we were able to meet all the build requirements without any issues and delays to the project timeline.

If your project has a complex hurdle to overcome, don’t write it off as not possible, give us a call and discuss what the issues are. If we don’t have the specialist knowledge in house, we have a wealth of technical contacts we can call on for help and advice – together we can make projects possible.

Customer Relocation

Thu, 14 Apr 2022 13:20:26 GMT

JTS have recently worked with a great customer who needed help to resolve a dilemma.

They were in the process of relocating to a fantastic new facility but their current chamber was just not up to being moved again and the existing cooling plant was extremely dated and inefficient. The project had lost valuable time in the pre-planning stage and delivery was getting critical, so the customer needed to find someone that would be able to design, build and install the chamber in a tight time frame.

The chamber specification was for a walk in room with a footprint of approx. 3m x 4.5m, which can be programmed to cycle temperature between -20°C and +60°C with an average rate of change of 0.2°C/min.

The customer tests multiple Process Gas Chromatographs at any one time, so the inside of the chamber was fully fitted out with electrical sockets to power up the test items. An enhanced safety system with fresh air purge was incorporated in the design due to the nature of the chromatographs and the gases fed through them.

The new refrigeration system was located external to the main building, which resulted in a pipe run of approx. 50m between the plant and the chamber. JTS selected a 6hp Bitzer Ecostar unit for the cooling system, which along with its key features of good efficiency and low noise levels, also incorporates a weather proof housing, giving a smart modern look to the plant area.

For those who follow us on linkedin ( https://www.linkedin.com/company/james-technical-services-limited/ ) you would have seen that the site installation and commissioning took place over a full week. The project completed within the customers relocation time line and this relieved customer has since fed back their appreciation of the finished chamber, it performance and the professional processes JTS employed to resolve their dilemma.

PECM Featured Article

Thu, 06 May 2021 07:33:37 GMT

JTS are proud to feature as an Editor's Choice in the 50th issue of Process, Engineering, Control & Manufacture magazine published this week.

TEST CHAMBER SPECIALISTS

Engineered Solutions, designed and built in Britain

James Technical Services is an established independent, specialist manufacturer – designing and building high-performance environmental test chambers for a wide variety of industries.

Our mission is to work closely with our customers to provide innovative solutions for their product development and quality assurance. As such, we are delighted to have been working on a project with Grayson Thermal Systems who is the market-leading supplier of cooling, HVAC and e-mobility systems across a variety of industries.

The design brief was to build a large environmental test chamber to provide controlled temperature conditions between -30°C and +55°C with some test loads dissipating up to 30kw.

The combination of a ceiling-mounted cooling unit, fitted with three EC fans and a speed-controlled Ecostar Bitzer condensing unit ensure maximum efficiency in full and part load operations.

Double doors and a removable aluminium ramp give easy access to a test area that is 2.8m wide x 3.8m deep and 2m high. The high load-bearing anti-slip floor is fitted with drainage points to facilitate the safe containment of test fluids used within the customer processes.

One wall of the room is fitted with an inlet and an outlet port allowing the customer to connect their test product up to an external conditioned temperature and humidity cyclone air supply. This cyclone air is mixed and conditioned in an insulated enclosure adjacent to the main test area where humidity is introduced via a steam lance. To give full testing flexibility two insulated stainless steel bungs are provided to isolate the cyclone system when it is not required.

As with any bespoke design, it is key that the customer interface is accurate, informative and easy to navigate, so for this JTS use the Watlow F4T touch screen programmable controller which permits custom screens to be created. Taking full advantage of ethernet connectivity the chamber can be run and monitored from a PC anywhere on the network.

With the chamber installed and commissioned, Grayson Thermal Systems can look forward to a future of reliable testing backed by our after-sales support for scheduled maintenance and calibration, with a quick efficient response should a breakdown occur.

The full magazine is available to view at https://joom.ag/Ku6I

Inside an Environmental test chamber

Thu, 15 Apr 2021 16:08:11 GMT

An environmental test chamber, often referred to as a climatic chamber, is an enclosure used to test the effects of specific environmental conditions. These tests are carried out on industrial products, materials, electronic devices, biological items and many other components.

The chambers operate by controlling the parameters of temperature and humidity, with a good airflow being an important part in achieving even distribution and uniformity.

Temperature Control

To achieve a set level of temperature the chamber must be able to both heat and cool to achieve and control at the desired level.

Heating – this is done using electrical heating elements sized accordingly to the chamber specification and positioned in the airflow to give even distribution and uniformity.

Cooling – this is done using a mechanical cooling system with close loop control. The main parts of a single stage cooling system are compressor, condenser, expansion valve, solenoid valves and cooling coil (Evaporator). Evaporators are sized to achieve a specific cooling duty and are generally located in a conditioning plenum to give even distribution into the test area. A single stage system will achieve temperatures down to -40°C.

A cascade system is a two stage cooling system and has the addition of a second compressor. The system uses two refrigerants, one type for the first stage and another for the second stage. A cascade system will achieve temperatures down to -65°C.

Humidity Control

To achieve a set level of humidity the chamber must be able to both humidify and dehumidify in order to achieve and control at the desired level.

Humidity – this is done by introducing steam into the test area, the steam is generated outside the test area and is pulsed into the conditioning plenum in a controlled manner.

Dehumidity – this is done by creating a controlled cold surface using the main refrigeration cooling system, moisture from the turbulent airflow is then condensed on to this cold surface.

All test chamber utilise these basic components and it is the expertise at JTS that pulls together the right combinations to ensure that the chambers we supply meet the customer specification.

Please get in contact to discuss your test chamber requirements, if one of our standard machines doesn’t meet the test specification we will be able to size a bespoke build that definitely will.

Covid-19 update

Thu, 15 Apr 2021 15:55:03 GMT

Here at JTS we have successfully navigated our way through the past 12 months of the pandemic. Having reacted quickly at the start, with working from home and some furlough, we were able to get our safety measure in place before striving to achieve another successful business year.

In Mid Wales we have been very fortunate that the vaccination programme has been meeting and exceeding Welsh Government targets, so here at JTS we are on the point of having 80% of our staff vaccinated with the last 20% on the short notice list.

Working with our external safety adviser, Dave Thomas of Thomas Safety Services Ltd, we were able to get our Covid-19 risk assessment completed and actioned promptly, enabling us to resume with our service work and site installation.

There will be further challenges for us all as we progress carefully through the next stages of living with the constant presence of Covid-19, but with our whole team onboard JTS are ready to meet the challenges with our proactive, safe and positive action plan.

So if you have chambers that need servicing and calibrating or you would like a sales visit to discuss a new project please get in contact.

Containerised Test Systems

Thu, 07 May 2020 12:13:44 GMT

JTS Ltd specialises in designing and building systems for temperature, humidity, rain, dust and vibration testing, with units ranging from small bench-top chambers to walk-in rooms, and air conditioning units to supply independent test rigs.

We work closely with our clients to build test solutions for individual company requirements, often involving innovative approaches.

One such project, currently, is for University of South Wales' Centre for Automotive and Power Systems Engineering (CAPSE). The team there are working with major companies to test new battery technologies, not only for the automotive industry but for National Grid and renewable energies too.

JTS has to date converted twelve 30 ft shipping containers into specialist self-contained ‘test cells’ for temperature and humidity testing at CAPSE’s Pontypridd site. Battery testing can be highly volatile and to minimise risk in this case, JTS engineers designed an innovative CO2 cascade system, capable of achieving a range of +80 / -40c at high rates of temperature change. As an inert gas, CO2 has a major advantage in this application over alternative refrigerants which are either highly flammable, less efficient or have a far higher GWP (Global Warming Potential).

Our relationship with CAPSE is ongoing, providing support and maintenance, and we’re now looking into training USW personnel to carry out simple troubleshooting and maintenance.

Working closely with clients ensures the best outcomes for individual test needs, whether the requirement is for standard or bespoke chambers, containerised systems, or walk-in rooms. With experience across a wide range of industries, and a client base including manufacturers such as Dyson, BAE Systems, TRW Automotive and Red Bull, we are ready to help you achieve the best environmental test solutions for your products.

Contact us if you have a special requirement, or are interested in knowing more about our containerised systems.

What is an environmental test chamber?

Wed, 06 May 2020 12:08:18 GMT

For an environmental test chamber engineer, the answer to an opening line of “What do you do?” can provoke one of two outcomes: curiosity - or a slightly glazed look and a wish of having never asked!

So, what is an environmental test chamber? In this short series we’ll introduce you to the how’s and why’s.

The simplest way to explain what a test chamber is, is to describe it as a highly insulated cupboard, fitted with various systems to simulate environmental conditions eg refrigeration for cold and humidity for damp. It can be small enough to fit on a bench – or big enough to hold a car or two. They are used to research, develop and manufacture many of the products in everyday use.

The chamber has a controller and can be programmed to give different cycles through hot and cold, dry and humid, even rain or dust or salt spray, according to requirements and specifications. The tests can also ensure adherence to certain Standards for products.

The test results help predict the potential lifespan of a product or material, and how well it will stand up to the conditions it will be expected to operate in. Test chambers can also be used to evaluate product quality and reliability, and to identify manufacturing weaknesses.

Examples of the products our test chambers have been used for:

• Deep sea pipeline valves (operation at cold temperatures);

• Traffic light sensors (need to be operational in all weathers);

• Office equipment (testing laminated materials);

• Electronic devices (how well will your phone operate in the rain…?);

• Smoke detectors, fire alarms & toxic gas detectors;

• Aerospace components (taking off in a hot desert, going up into cold atmosphere).

Click here to find out more about our test chambers, or call us if you have a requirement you’d like to discuss.

Next up: Inside a Test Chamber: how it works...

7c23457e

Service Engineer joins JTS Team

MP for Brecon, Radnor and Cwm Tawe David Chadwick

Electrical Design Engineer

Talgarth Town Football Club

Electric Vehicle Charging at JTS

JTS transfers to Employee Ownership

Welsh engineering company transfers to Employee Ownership

Maximising test load capacity

An issue faced by many customers is how to achieve the most test capacity without impacting on chamber performance. Putting the maximum test load in and still achieving even distribution and stability is a challenge when building bespoke equipment.

﻿ Airflow is key and having a good understanding of how a customer will load their product ensures the best results are achieved.

Rising To The Challenge

Complex Installations

One of the exciting things about the work we do at JTS is the fact that no two projects are the same.

Customer needs can be varied and sometimes the solution seems impossible, but most are issues that can be resolved, especially if JTS are invited into discussions at the early stages of a project.

﻿

We have worked through an extensive list of site complication over the course of supplying chambers all over the UK – few are new to us.

Customer Relocation

PECM Featured Article

JTS are proud to feature as an Editor's Choice in the 50th issue of Process, Engineering, Control & Manufacture magazine published this week.

Inside an Environmental test chamber

An environmental test chamber, often referred to as a climatic chamber, is an enclosure used to test the effects of specific environmental conditions. These tests are carried out on industrial products, materials, electronic devices, biological items and many other components.

Covid-19 update

Here at JTS we have successfully navigated our way through the past 12 months of the pandemic. Having reacted quickly at the start, with working from home and some furlough, we were able to get our safety measure in place before striving to achieve another successful business year.

Containerised Test Systems

JTS Ltd specialises in designing and building systems for temperature, humidity, rain, dust and vibration testing, with units ranging from small bench-top chambers to walk-in rooms, and air conditioning units to supply independent test rigs.

What is an environmental test chamber?

For an environmental test chamber engineer, the answer to an opening line of “What do you do?” can provoke one of two outcomes: curiosity - or a slightly glazed look and a wish of having never asked!

Airflow is key and having a good understanding of how a customer will load their product ensures the best results are achieved.