Indicator device for application in explosive gas atmospheres has transmitter/receiver station for radio signals, indicator and flameproof case with bottom and top part with opening sealed with flexible silicon cover

摘要

An indicator device with a transmitter/receiver station for radio signals has an indicator (4) and a flameproof casing with bottom (1) and top (2) parts. The top part has an opening sealed with a flexible transparent silicon cover (3). The top and bottom parts and the cover are joined with rubber seals and/or connected by adhesive with the option of grooves, undercuts or sills.