- Used in dirty water applications, the 3SPD24-ROD Checkpoint SmartProbe sensor has set points for Pump 1 On, Pump 2 On, All Pumps Off and High Alarm. This provides a Duplex Pump Down function and High Alarm using three switch outputs.
- Programming logic provides a sequence on and all off function for Pumps 1 and 2. Each pump will turn on when water contacts its respective sensor rod and both pumps will turn off when water is below the All Pumps Off sensor rod.
- The sensor uses a differential between the Pump 1 On and All Pumps Off to determine when the Pump 1 is needed and a similar differential between Pump 2 On and All Pumps Off. This hysteresis allows for the control over On and Off functions using a single switch output for each pump.
- This sensor has three power supply options. See Power Supplies below for details.