Monitoring fullness of containers

1. A waste compactor monitoring system comprising:

a monitoring assembly;

a remote processing system; and

a communication connection connecting the monitoring assembly to the remote processing system; wherein

the monitoring assembly comprises a hub device and two or more sensors connected to the hub device and positioned on a waste compactor system, wherein a first sensor of the two or more sensors monitors a first condition of the waste compactor system and a second sensor of the two or more sensors monitors a second condition of the waste compactor system that is different from the first condition; wherein

the first sensor comprises a level sensor for detecting a level of hydraulic fluid in a reservoir; and wherein

the communication connection is configured to communicate the first and second conditions to the remote processing system.

2. The system of claim 1 wherein the two or more sensors comprise a pressure sensor connected to a hydraulic line of the waste compactor system, and wherein the hub device comprises a controller configured to determine fullness of a container of the waste compactor system based on pressure data from the pressure sensor.

3. The system of claim 1 wherein the two or more sensors comprise a proximity sensor positioned to detect the presence or absence of the waste compactor system or a container of the waste compactor system.

4. The system of claim 1 wherein the two or more sensors comprise a connection sensor configured to detect the presence or absence of a connection of the compactor system to power or to a fixed connection.

5. The system of claim 1 wherein the remote processing system comprises a scheduling system configured to autonomously schedule servicing of the container.

6. The system of claim 1 wherein the communication connection is configured to communicate sensor configuration information to the monitoring assembly.

7. The system of claim 1 wherein the hub device comprises a controller configured to analyze data from the two or more sensors and determine the first and second conditions of the waste compactor system.

8. A sensor assembly for a waste container monitoring system, the sensor assembly configured to connect to a hydraulic reservoir in a waste compactor, the sensor assembly comprising:

a breather cap configured to facilitate intake of air into the reservoir;

a sensing element configured to detect a level of fluid in the hydraulic reservoir;

a dip tube carried by the breather cap and positioned to support the sensing element inside the hydraulic reservoir; and

one or more wire leads connected to the sensing element and extending from the sensing element, through the dip tube, and through the breather cap, wherein the one or more wire leads are configured to provide a signal connection to the sensing element.

9. The sensor assembly of claim 8 wherein the sensing element comprises a float level sensor.

10. The sensor assembly of claim 8 wherein the sensing element comprises a reed switch or a limit switch.

11. The sensor assembly of claim 8 , further comprising an external connector element configured to operatively connect the sensing element to the waste container monitoring system.

12. The sensor assembly of claim 11 , further comprising one or more intermediate connector elements configured to connect the sensing element to the external connector element.

13. The sensor assembly of claim 8 , wherein the sensing element is further configured to detect a temperature in the hydraulic reservoir.