The MC 240-S45 set is intended for heavy-duty applications, designed for mounting on doors and gates etc. It includes the MC 240-C magnetic reed in an MC 200-4 aluminium housing and an extra strong magnet in an MC 200-41 housing to allow contact actuation with wider gaps. The MC 240-S45 set can be used with an MC T armoured sleeving accessory (MC T2, MC T4, MC T7).