derwent james safety equipment & consultancy

Providing outstanding sampling equipment, consultancy and expertise for your company.

Tel: 01332 673700 Mobile: 07968 512311 Email:

process industry safety

Latest News, Updates & Articles

2019 week counter

We’ll soon be taking delivery of a few more of our really useful week planners.  These “wheels” are a useful tool to have on your desk when planning ahead into 2019.  If you would like one then get in touch … [Continue Reading]


Happy Birthday!

Great excuse for a Friday cake. We are celebrating our 9th birthday this weekend. Time has flown by since we started Derwent James Ltd in 2009. We remain the Exclusive UK representatives for Dopak chemical sampling systems as well as … [Continue Reading]

derwent james ltd 9th birthday

Circor Sample Systems

Circor sample systems from Dopak. Represented exclusively in the UK by Derwent James Ltd. We have over 20 years experience in the design of emission free sampling systems and valves for sampling hazardous chemical liquids and gases. We are available … [Continue Reading]

Sampling Express

Dopak bottle septa

Dopak sampling systems use a variety of septa materials and sizes. Make sure you have the correct Dopak bottle septa when sampling your hazardous chemicals. Dopak have stock of all septa ready for shipment. So, as the UK reps for … [Continue Reading]

Dopak septa and septum

Chemical sample cylinder

Our extensive range of chemical sample cylinders are suited for chemical sample collection, safe transport and chromatographic laboratory analysis. The type of chemical sample cylinder we offer are available in different volumes and material of construction. Chemical sample cylinders are used for samples … [Continue Reading]

Chemical sampling cylinder

Chemical sampling cooler

A Dopak single coil, tube shell type chemical sampling cooler is an effective and efficient heat exchanger. This compact sample cooler design makes it easy to install protecting the chemical sampling system from high temperatures ensuring safe chemical sampling in … [Continue Reading]

Chemical sampling cooler

Dopak sample bottle part numbers

Dopak sampling systems can use a sampling bottle of a variety of sizes, materials and set sizes. The below tables contain Dopak sample bottle part numbers to help your search for the correct part number.  Use the below tables as … [Continue Reading]

dopak sample bottles

Spare parts for Dopak sampling systems

In order to maintain your Dopak sampling system in the best condition spare parts are available.  Part numbers and specifications are below. Ball Valves Needle assemblies No bottle no flow *NEW Sleeves Gearbox Handles Spring return handles Regulators Gauges Carbon … [Continue Reading]


Providing outstanding sampling equipment, consultancy and expertise for your company.