TOA Gas Warning LED Displays with Acoustic Signalling are used for signalling alarm conditions internally in underground car parks.

The Alpa SZOA Optical – Acoustic Signaller is a device designed to indicated alarms and capable of collaborating with any master control unit manufactured by Atest Gaz.

Visual-acoustic Alpa SZOAmini is a device used to signal alarms in public buildings such as gas boiler houses or halls heated radiators.

Signaller LTT2 is a device dedicated to optical and acoustic signalling of the presence of hazards in the particular industrial installation. Devicde can be installed in Zone 2 (II3G 3D) of gas and dust hazardous area.

Signaller LTT4 is a 4- segment's device dedicated to optical and acoustic signaling of the presence of hazards in the particular industrial installation.

The flameproof SOLED3 signaller is a device for optical signaling in potentially explosive atmospheres, using light signals (different colors).