With the retirement of Ray and John Gill, as of October 1st 2022, ACM Instruments has transferred from Applied Corrosion Monitoring Ltd. to ACM Instruments Ltd.

We have also moved up the road, to the beautiful village of Cartmel. Home of Cartmel Races and the world famous Cartmel Sticky Toffee Pudding. Close to the lovely old Georgian Manor house, Aynsome Manor Hotel.

ACM Instruments Ltd. Director, Andrew Haworth, is a long term employee of ACM Instruments and has provided technical support for our products for the last 33 years.

Word from our new director:
I am happy to have the opportunity to continue the company started by Ray and John Gill.  I would like to thank all the past and present employees of ACM Instruments and our customers for their support.  


ACM Instruments was founded in the summer of 1985 and incorporated as Applied Corrosion Monitoring Ltd on 25th November 1985 but still trades as ACM Instruments. Using a common background of physics and electrochemistry at UMIST, John and Ray Gill (having designed electronic warfare solutions at Racal) formed Applied Corrosion Monitoring Ltd. Initial products were manual potentiostats and ZRAs generally acknowledged to be less easy to perfect than computer controlled equipment (where a trims file can hide a multitude of sins) and established our reputation in the precision end of the market.

The quality of our instrumentation has always been of utmost importance, working with our customers and improving them all the time. Basics of all our instrumentation is a floating potentiostat and ZRA in a shielded enclosure and a shielded power supply. We even give our plastic boxed instruments (such as our Field Machine) a special conductive coating to shield from those outside interferences.

Build our potentiostats in to noisy PCs, no, not us. We may build a PC into our instrument (separately screened, naturally) and by adding internet connection either via a LAN, phone line or mobile phone, our new internet control software gives you a reliable system, where data can be retrieved from any PC connected to the internet, giving you the ability to change your test parameters without leaving your office (or home).

Our range of instrumentation has dramatically increased since 1985.  Most instrumentation started off as bespoke to meet the demands of the end user. Gradually some of these instruments have become standard products due to being able to meet most of our customers needs. We offer laboratory instrumentation such as Gill AC, Gill 8 or 12, Weld Tester and Pot 16. We also provide weatherproof on-site and portable instrumentation, such as the Field Machine which was first developed in 1993. 

Our telephones are often answered by one or other of the directors. No one is more committed to the products and good name of a company than the owners of the business. We like to experiment ourselves and love to hear the results of your tests. Good old fashioned politeness and genuine care for customers are the rule not the exception. Pick up the phone or send an e-mail to and give us a try or why not take a trip to the Lakes and visit us.


Company Information

Trading Name ACM Instruments
Registered Name & Office

ACM Instruments Ltd
The Silver Works
Aynsome Lane,
LA11 6HH

Company No 13938770
Date of Incorporation 24th February 2022
Country of Origin United Kingdom
Company Type Private Limited Company
VAT No GB 423 3614 25