Apparatus and methods for a sensor system are provided. The system may be configured to detect a dispensing of cash from an automated teller machine (“ATM”). The system may be configured to orient one or more sensors to capture a first information stream that includes the dispensing of cash. The system may be configured to detect a retraction of cash by the ATM. The system may orient one or more sensors to capture a second information stream that includes the retraction. The system may be configured to determine an estimate of cash collected by an ATM customer. The estimate may be based on a comparison of the first information stream and the second information stream.