Command and signal unit series RS/RX are electrical device such as push button, pilot light, emergency mushroom push button, rotary switch, etc suitable for electrical junction boxes installed in classified hazardous area Zone 1 & Zone 21.

RX and RS series are similar except for the fact that RX series can be installed on e.j.b. with internal volume less than 2dm³. RS series can be installed on any electrical junction box with volume greater than 2dm³ but lower than 160,6dm³ for gas group IIB and IIB+H2 and 62,9dm³ for gas group IIC. Both the series are made using different materials, but main parts are in nickel plated brass or in Stainless Steel AISI 316L (series RXI / RSI).