Level sensors for metering system container

A material metering system, comprising:

• a first pressure sensor assembly configured to indicate a low material level in a container;
• a second pressure sensor assembly configured to indicate a substantially full material level in the container;
• and
• a controller communicatively coupled to the first and second pressure sensor assemblies and configured to engage a transfer of material to the container in response to the low material level indication from the first pressure sensor assembly and to disengage the transfer of material to the container in response to the substantially full material level indication from the second pressure sensor assembly:
• wherein each pressure sensor assembly is substantially scaled and includes a filter configured to block material from entering the sensor assembly.

A material metering system, comprising:

• a first pressure sensor assembly configured to indicate a low material level in a container;
• a second pressure sensor assembly configured to indicate a substantially full material level in the container;
• and
• a controller communicatively coupled to the first and second pressure sensor assemblies and configured to engage a transfer of material to the container in response to the low material level indication from the first pressure sensor assembly and to disengage the transfer of material to the container in response to the substantially full material level indication from the second pressure sensor assembly;
• wherein the first and second pressure sensor assemblies each comprise a reed switch.

A material metering system, comprising:

• a container configured to receive material through an opening within an upper portion of the container;
• a first sensor assembly disposed within a lower portion of the container and configured to output a signal indicative of contact with the material;
• a second sensor assembly disposed within the upper portion of the container and configured to output a signal indicative of contact with the material;
• and
• a controller communicatively coupled to the first and second sensor assemblies and configured to engage a transfer of material to the container in response to the signal from the first sensor assembly indicative of contact with the material and to disengage the transfer of material to the container in response to the signal from the second sensor assembly indicative of contact with the material;
• wherein the first and second sensor assemblies each comprise a diaphragm sensor configured to detect contact with a substantially dry powder;
• wherein each diaphragm sensor comprises a substantially sealed enclosure including a filter configured to block material from entering the enclosure while facilitate the passage of air.