Full membership is open to companies who have been engaged in the Industry for a period of two years and who satisfy CoGDEM's Council as to their commercial and technical competence.

Associate membership is open to companies or individuals "active in the business of gas detection" but do not fall into full membership category. These include the UK's leading certification bodies, experienced gas detector consultants and others with a wide interest in gas detection. Their input and knowledge and contribution to CoGDEM is much appreciated.