Siemens 3UG4501-1AA30, Analog Monitoring Relay Fill Level Monitoring Resistance Monitoring From 2 To 200 Kohm Overshoot And Undershoot 24 V Ac/Dc Dc And Ac 50 To 60 Hz 2-Point Or 1-Point Control Tripping Delay 0.5 To 10S 1 Co Contact Screw Terminal Replacement Product For 3Ug3501-1Ac20