You searched for "Monitoring Module"
RS PRO
RS PRO Capacitive Barrel-Style Proximity Sensor, M12 x 1, 4 mm Detection, NPN Output, 10 → 30 V dc, IP67
Part: 184-5586
Liquid and plastic level detector with cable connection for tank monitoring.
RS PRO
RS PRO Capacitive Barrel-Style Proximity Sensor, M30 x 1.5, 15 mm Detection, 20 → 250 V ac, IP67
Part: 184-5636
AC-powered level and material sensor for tank monitoring and bulk handling.