BT Signal Phones from Patlite Signal/JTEC have a maximum sound pressure level at one metre of 85dB. They also come with an adjustable volume control.
The phones can be mounted in one of three ways; directly to the panel enclosure with the detachable mount, directly onto the panel or flush mounted. The flush mounted phone is suitable for use in high-humidity areas and meets IP34 requirements.
One shot contact closure replays selected channels one time only and continuous contact closure replays selected channels repeatedly. These phones are also compatible with NPN open collectors and the message ROM can be replaced within the same type of product.
BT signal phones are ideal for outdoor use, in factories and facilities where there is high humidity and/or dust present.