About

The company specialises in cryogenics, process engineering and new product development. The combination of engineering analysis and experience brings innovative and cost effective designs into reality to deliver cooling solutions from room temperature down to 1.5 K.

The skills encompass a broad range of technologies from helium liquefiers to liquid nitrogen, from cryocoolers to dilution refrigerators. This can be used to separate mixtures by cryogenic condensation either for pollution abatement or species purification.  Liquid helium cooled systems have been used for superconducting RF cavities on particle accelerators and superconducting magnets.

Charles is the principal technologist of the company. He graduated from Cambridge in 1984 with a degree in engineering and, having started work in the cryogenics sector, has over 35 years of relevant experience.  He has a proven track record of innovation and a reputation as an expert in cryogenics including a number of publications to his name.  He has given lectures in the UK, mainland Europe, the USA and China and is a Fellow of the Institution of Mechanical Engineers.

Monroe Brothers Ltd was re-started as an engineering consultancy in 1996 by Charles Monroe following his return to the UK after working as an engineer in Italy. Before this the company had a history in ship-owning and ship managing from 1920 to 1992. If you would like to know more about the earlier history … 

Charles Monroe Profile
"I thank you very much for the comprehensive reports for the quench analysis update and the excellent thermosiphon analysis. Your reports are very well presented, explained and fully valuable for our project.”
Frédérick Forest
Sigmaphi

Monroe Brothers Timeline

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1920
Monroe Brothers Ltd as a shipping company is founded
1992
Monroe Brothers Ltd is wound up
1996
Monroe Brothers Ltd is re-founded as an engineering consultancy
1999
Pollution abatement at AstraZeneca

One year hold time cryostat for a 400 MHz NMR superconducting magnet, Oxford Instruments

2001
Helium cooling for the synchrotron at Diamond Light Source, UK
2002
Cryostat at 2.2 K for the Discovery 900 MHz NMR superconducting magnet, Oxford Instruments
2005
Helium cooling system at 2 K for the Energy Recovery LINAC Prototype ALICE, Daresbury Laboratory, UK
2007
Alstom Sweden, Carbon Capture & Storage
2007
Oxford instruments helium recovery system
2011
Helium cooling system for the synchrotron NSLS II Brookhaven, USA
2012
Mechatech AVDS (Advanced Vacuum Drying System)
2012
Lectures on cryogenic design
2013
Sigmaphi, France Dipole and Quadrupole superconducting magnets for the Jefferson Laboratory USA
2013
GRE helium gas cooling systems at 150 K and 6 kW
2015
Tokamak Energy ST25 Superconducting Tokamak
2017
Nitrogen gas cooling systems for satellite testing at RAL Space
2021
Process system to extract the medicinal cannabis for 113 Botanicals

History of Monroe Brothers Ltd

The business was originally involved in ship owning and ship management. It was founded in 1920 by Kenneth Monroe shortly after he was demobilised at the end of the First World War…

Kyleglen II (WSPL Brownell Collection)