About Castell

Who we are 

Castell is part of the Sentric group, which consists of three sister companies – Kirk in the US, Castell in the UK and STI in France. Sentric group produces uncompromising safety solutions for businesses whose people and equipment operate in harsh and safety critical environments.  

The Sentric group is part of the Halma Group. 


What we do

Keeping people safe has been at the forefront of our mind at Castell since our very beginning and is the essence of everything we believe and do.

From power generation & distribution, heavy plant works to loading bays and many industries in between, we believe that everyone has the right to be safe at work.

Close collaboration with our customers has built our experience over 100 years, and with this knowledge we help you to reduce and manage your risks.  This improves safety practices & culture, can offer efficiency gains and reduces costs associated with workplace accidents.

We provide a range of safety components working in synergy to build a solution of trapped key interlocking to suit virtually any application. This enforces the operator to follow a safe procedure or process every time, safeguarding your people and assets.

Find out more about trapped key interlocking here.

Who we help

Our range of products have been developed to provide our customers with interlocks of the highest quality and integrity, protecting personnel and assets in high risk  operating environments.

Castell products are found in a vast range of sectors (energy, industry, manufacturing, transport) and applications (loading bay safety, machine guarding) around the globe.

We help diverse stakeholders, from health and safety, compliance, project, operations, logistics, procurement managers and engineers to directors, who seek cost-effective safety solutions to prevent accidents, keep people and machinery safe at work, and safeguard processes.

How can we help you

Castell’s approach to working with customers is deeply rooted in understanding the safety issues found in modern industrial environments. Recognising how safety impacts operations is an important step to designing components that deliver fast safe access ensuring that efficiency is maintained and output rates are secured.

Our product range includes mechanical interlocks, motor sensing interlocks, valve interlocks, time delay key release units, key exchange boxes and access interlocks. The proper application of our products ensures that a process is followed and cannot be circumvented or short cut.

What our customers say

Backed by FTSE 100 Halma

Halma plc is a global group of life-saving technology companies. Our companies provide innovative solutions to many of the key problems facing the world today, from water security to preventable blindness.

Halma’s business is spilt into four sectors. Process Safety products protect people and assets at work. Infrastructure Safety saves lives, protects infrastructure and enables safe movement. Our medical technology enhances the quality of life for patients and improves quality of care delivered by providers. Our Environmental and Analysis companies focus on products and technologies for analysis in environmental safety and life sciences markets.

The group is a FTSE 100 company with over 6,300 employees in more than 40 subsidiaries worldwide. Together we have a Purpose that drives everything we do: Growing a safer, cleaner, healthier future for everyone, every day.

For more, visit the Halma website: https://www.halma.com/