An Auto Firedamp Detector and Alarm MKII.
This is an auto firedamp detector and alarm – Ministry of Power firedamp detector approval No.12. It detects firedamp gas from 0% to 3%.
The unit has a hanging hook and a magnetic lock to access the battery housing.
Manufactured by English Electric, made in England by the E. E. Co Ltd.
Made from various materials such as metal, glass and steel. Size 12″ x 3″ x 3″ inches.