The Soba Ex looks exactly the same as the Soba HR HY and performs the same functions, however, its particular conception allows it to be ATEX certified.
HR HY (High Resistance, ATMI exclusivity) 3x1mm2 H07RN-F certified cable
Compulsory for multilevel regulation in sewage pumping stations with explosive risks 0, 1, 2 (gas) & 20, 21, 22 (dust). The Soba Ex must be obligatory connected to an intrinsically safe relay.