A flush toilet includes a toilet main body and a control unit. The toilet main body includes a skirt, a rear storage configured to store at least a part of the control unit, and an opening to which a drain pipe is connected is formed penetrating, in a front-rear direction, a portion below a center in a left-right direction of a rear wall of the skirt. The rear storage forms a discharge socket storage on a front side of the opening in a region below a center of the rear storage in the left-right direction. And a side wall surface in the discharge socket storage protrudes more in a center direction of the opening than a side wall surface in the opening, to reduce an opening cross-sectional area of the discharge socket storage to be smaller than an opening cross-sectional area of the opening.

Apparatus and methods are described for use with feces of a subject that are disposed within a toilet bowl. One or more light sensors receive light from the toilet bowl, while the feces are disposed within the toilet bowl. A computer processor detects a set of three or more spectral components that have a characteristic relationship with each other in a light spectrum of bile, by analyzing the received light, and detects a presence of bile within the feces, in response to detecting the set of three or more spectral components. The computer processor generates an output in response thereto. Other applications are also described.

A flush toilet includes: a toilet body; a function unit arranged in a rear part of the toilet body; a panel member covering a side surface of the function unit and including a protruding part protruding toward the toilet body; and a holding part causing the toilet body and the panel member to hold to each other by magnetic force. The toilet body includes: a reception part arranged under the protruding part and receiving the protruding part in a state where the panel member is attached to the toilet body; and a protrusion part extending upward from the reception part. When the panel member is attached to the toilet body, the protrusion part is in a position where at least a part of the protrusion part is overlapped with the protruding part in a rear view when the toilet body is viewed from behind.

A leak and/or overflow detection system for an aircraft may comprise a first sensor configured to be disposed in a toilet bowl, a second sensor configured to be disposed in a waste tank, a first acoustic emission sensor and a second acoustic emission sensor configured to be disposed upstream and downstream of a valve, or any combination of the first sensor, the second sensor, and the acoustic emission sensors. A controller may receive various data from the sensors and determine whether a leak and/or an overflow condition is occurring or about to occur.

Apparatus and methods are described for use with feces of a subject that is disposed within a toilet bowl (23), and an output device (32). One or more light sensors (60, 62, 64, 66) receive light from the toilet bowl, while the feces are disposed within the toilet bowl. A computer processor (44) analyzes the received light, and, in response thereto, determines that there is a presence of blood within the feces, and determines a source of the blood from within the subject's gastrointestinal tract. The computer processor (44) generates an output on the output device (32), at least partially in response thereto. Other applications are also described.

A detection range specification member for a human body detection sensor is provided in a washroom and is configured to specify a detection range of a human body detection sensor having an infrared sensor body configured to detect a human body. The detection range specification member for the human body detection sensor includes a material that reduces transmission of infrared rays, and is provided so as to cover at least a part of the infrared sensor body. The detection range specification member for the human body detection sensor is a sheet member that is configured to allow installation on a sensor surface side of the infrared sensor body.

A flush toilet includes a toilet body that includes a bowl part that receives waste, a functional part that is provided on a back side of the toilet body, a panel member that covers a side surface of the functional part, a magnet that is provided on one of the panel member and the toilet body, and a magnetic body that is provided on another of the panel member and the toilet body, where at least one of the panel member and the toilet body includes an attachment part that includes a recessed part for attaching the magnet or the magnetic body to the attachment part.

A flush toilet includes a toilet body that includes a bowl part that receives waste, a functional part that is provided on a back side of the toilet body, a panel member that covers a side surface of the functional part, a magnet that is provided on one of the panel member and the toilet body, and a magnetic body that is provided on another of the panel member and the toilet body, where at least one of the panel member and the toilet body includes an attachment part that includes a recessed part for attaching the magnet or the magnetic body to the attachment part.

A flush toilet includes a toilet body that includes a bowl part that receives waste, a functional part that is provided on a back side of the toilet body, a panel member that covers a side surface of the functional part, a magnet that is provided on one of the panel member and the toilet body, a magnetic body that is provided on another of the panel member and the toilet body, and a holding part that holds one of the magnet and the magnetic body so as to be capable of being moved or deformed toward another of the magnet and the magnetic body.

A flush toilet includes a toilet body that includes a bowl part that receives waste, a functional part that is provided on a back side of the toilet body, a panel member that covers a side surface of the functional part, a magnet that is provided on one of the panel member and the toilet body, a magnetic body that is provided on another of the panel member and the toilet body, and a holding part that holds one of the magnet and the magnetic body so as to be capable of being moved or deformed toward another of the magnet and the magnetic body.