A fluid level sensing system comprises a sensor float assembly, a sensor control module comprising a sensor processor, and a sensor cable. An accelerometer arranged within the float chamber in a fixed orientation relative to a float axis. The accelerometer is capable of determining movement in at least first and second reference axes. The sensor cable is operatively connected between the float processor and the sensor processor. Movement of the float enclosure relative to the reference point is limited. The accelerometer generates and transfers to the float processor first and second sets of data representative of movement along the first and second reference axes. The float processor generates and transfers to the sensor processor pitch data associated with the float enclosure based on the first and second sets of data. The sensor processor generates a status signal and/or a control signal based on the pitch data.

A water-level measuring device using a gear ratio includes: a water pool filled with a liquid; a plot receiving buoyancy by being floated over a water surface of the liquid filled in the water pool; a cable connected to the plot and extending to the outside of the water pool; a first gear connected with the cable; a second gear connected with the first gear; a weight pendulum connected with the second gear and moving in up and down directions, wherein when a water level of the water pool descends, the weight pendulum ascends due to a weight of the plot, and when the water level of the water pool ascends, the weight pendulum descends due to the buoyancy of the plot.

A water-level measuring device using a gear ratio includes: a water pool filled with a liquid; a plot receiving buoyancy by being floated over a water surface of the liquid filled in the water pool; a cable connected to the plot and extending to the outside of the water pool; a first gear connected with the cable; a second gear connected with the first gear; a weight pendulum connected with the second gear and moving in up and down directions, wherein when a water level of the water pool descends, the weight pendulum ascends due to a weight of the plot, and when the water level of the water pool ascends, the weight pendulum descends due to the buoyancy of the plot.

A liquid level sensor includes a base member disposed above the liquid. A lever arm is pivotally attached to the base member. The lever arm is configured to interact with the liquid so that it has an angular displacement relative to the base member. The angular displacement is a function of the level of the liquid in the liquid channel. A sensor senses angular displacement of the lever arm. A communications circuit transmits the angular displacement of the lever arm to a remote location. In a method of detecting a liquid level, a float that is buoyant in the liquid is placed into the liquid and is coupled to a lever arm. An angular displacement of the lever arm relative to a base member is measured. The liquid level is a function of the angular displacement of the lever arm.

A liquid level sensor includes a base member disposed above the liquid. A lever arm is pivotally attached to the base member. The lever arm is configured to interact with the liquid so that it has an angular displacement relative to the base member. The angular displacement is a function of the level of the liquid in the liquid channel. A sensor senses angular displacement of the lever arm. A communications circuit transmits the angular displacement of the lever arm to a remote location. In a method of detecting a liquid level, a float that is buoyant in the liquid is placed into the liquid and is coupled to a lever arm. An angular displacement of the lever arm relative to a base member is measured. The liquid level is a function of the angular displacement of the lever arm.

A float assembly comprising a float traveling along a rod until making contact with either an upper or a lower adjustable stopper, so that an actuator lever having one or more counterweights in mechanical coupling with a switch, so that the float assembly may respond to the fluid level.

A liquid level measuring device for measuring a liquid level in a container, the device including a housing, a spool means mounted to the housing and movable during operation, a line attached to the spool means, the line windable onto and from the spool means, a float attached to the end or adjacent the end of the line, a sensor to detect a change in the tension in the line, the sensor is mounted to the housing and is operatively associated with the line, and a measuring means to measure the length of the line that is unspooled from the spool means when a predetermined change in tension in the line is detected, the predetermined change is when the float has reached the liquid level in the container, wherein in use, the line is unspooled from the spool means causing the float to move away from the housing, and wherein when a predetermined change in tension in the line is detected the measuring means measures the length of line that has unspooled from the spool means.

An overflow detection system for a grease trap or other receptacle is provided. The overflow detection system includes an overflow sensor. The overflow sensor can include a switch and a processor. The switch can include a float configured to float in a fluid in the receptacle, a surface that is separate from the float, and a resilient member coupled between the float and the surface. The switch can generate a signal in response to the float being within a predefined distance of (e.g., contacting) the surface. The processor can receive the signal from the switch and, in response, transmit a notification to a user device that is remote from the receptacle. The notification can indicate a high fluid level in the receptacle.

A fluid level sensing system comprises a sensor float assembly, a sensor control module comprising a sensor processor, and a sensor cable. An accelerometer arranged within the float chamber in a fixed orientation relative to a float axis. The accelerometer is capable of determining movement in at least first and second reference axes. The sensor cable is operatively connected between the float processor and the sensor processor. Movement of the float enclosure relative to the reference point is limited. The accelerometer generates and transfers to the float processor first and second sets of data representative of movement along the first and second reference axes. The float processor generates and transfers to the sensor processor pitch data associated with the float enclosure based on the first and second sets of data. The sensor processor generates a status signal and/or a control signal based on the pitch data.

A liquid level monitoring and transmission system includes a mechanical assembly in communication with the liquid in a container and a dual electronic encoder assembly in communication with the mechanical assembly for determining liquid level. The dual electronic encoder assembly includes a first encoder for encoding data indicative of fine level measurements and a second encoder for encoding data indicative of coarse level measurements. The system further includes at least one processor for controlling operation of the first and second encoders and for processing encoded data therefrom and a power control system.