Starting out in the 1930s as a company manufacturing metal conduit products, the company acquired hazardous area expertise from acquisitions and mergers during the 1970s and became part of the Chamberlin & Hill group at this time. Solenoids & Regulators Ltd had operated since the early part of the 20th century, and grew into manufacturing generator controls before producing motor control gear for use in hazardous areas. They were based in Balsall Heath, Birmingham, UK and became part of the Chamberlin & Hill group in 1979.

Our aim is a simple one-to provide safe, reliable quality products, designed for the rigours of hazardous area applications, be that an offshore environment or a simple workshop inspection pit. At the forefront of our design philosophy is how to make it easy for the customer to use Petrel products. You will notice amongst our products innovative design ideas to overcome real world situations both in ongoing routine maintenance and installation.