Low voltage level controllers

A system, comprising:

• a vessel having a torque tube assembly;
• a low voltage level controller comprising a sensor head removably attached to the torque tube assembly;
• the sensor head comprising a first aperture positioned horizontally in the sensor head and extending from a front side of the sensor head to a rear side of the sensor head, the first aperture having a front portion circumscribed by a connection location and a rear portion configured to attach to a torque tube assembly;
• the sensor head comprising a second aperture positioned vertically in the sensor head and extending from a bottom side of the sensor head to the connection location of the first aperture, the second aperture configured to receive a proximity sensing switch;
• the low voltage level controller further comprising a proximity sensing switch positioned in the second aperture of the sensor head and configured to detect a torque tube sensing rod that protrudes from the torque tube assembly into the connection location of the first aperture of the sensor head;
• the low voltage level controller further comprising a control box located remotely to the sensor head, the control box comprising a solenoid;
• a fuel gas supply line;
• a dump valve line;
• a fuel gas ventilation line;
• a switching mechanism in electrical communication with the proximity sensing switch;
• and a battery in electrical communication with the switching mechanism and the proximity sensing switch;
• wherein the solenoid controls flow of fuel gas from the fuel gas supply line into the dump valve line and release of fuel gas from the dump valve line into the fuel gas ventilation line;
• and
• the system further comprising a remotely located dump valve on the vessel, the dump valve in fluid connection with the dump valve line.