Abstract: To enable accurate measurement when a flow rate is measured using an ultrasonic signal. An ultrasonic flowmeter includes a first ultrasonic element and a second ultrasonic element, a damping pipe, a first ultrasonic propagator and a second ultrasonic propagator, which are arranged outside the damping pipe, and a flow rate measurement unit that measures a flow rate based on an ultrasonic signal transmitted and received between the first ultrasonic element and the second ultrasonic element. The first ultrasonic element, the first ultrasonic propagator, the damping pipe, the second ultrasonic element, and the second ultrasonic propagator are accommodated in a housing.

Abstract: Provided are a diffusion plate that diffuses light emitted from a light source, and a prism having a first surface to receive the light transmitted through the diffusion plate, a second surface to reflect the light in contact with a measurement target liquid, and a third surface to extract the reflected light. The light source, the diffusion plate, a light receiving lens, and an imaging element are accommodated in a holder that presses the prism from the inner side to the outer side.

Abstract: Provided is a displacement sensor having a modular structure that allows further downsizing. A housing of a head is made up of a main housing and a lid member, both of which are precision molded products made of a metal material. A first holder to which a light projector is bonded and a second holder to which a light receiver is bonded are individually positioned on and bonded to the lid member. This work is performed by a mounting device. Optical components such as a light projecting lens are also bonded to the lid member, and the lid member modularized by incorporating such optical components is assembled and welded to the main housing.

Abstract: A photoelectric sensor includes a connecting section for light projection to which a light propagation member for light projection optically coupled to a light emitting element is connected, a connecting section for light reception to which a light propagation member for light reception optically coupled to the light receiving element is connected, a signal generating unit configured to compare a light reception signal generated by the light receiving element and a threshold and generate a detection signal indicating a result of the comparison, a first light emitting element for indication optically coupled to the connecting section for light reception, and a mounting substrate on which each of the first light emitting element for indication and the light receiving element is positioned in the connecting section for light reception or one of the first light emitting element for indication and the light receiving element is positioned via the other.

Abstract: A photoelectric sensor includes a connecting section for light projection to which a light propagation member for light projection optically coupled to a light emitting element is connected, a connecting section for light reception to which a light propagation member for light reception optically coupled to the light receiving element is connected, a signal generating unit configured to compare a light reception signal generated by the light receiving element and a threshold and generate a detection signal indicating a result of the comparison, a first light emitting element for indication optically coupled to the connecting section for light reception, and a mounting substrate on which each of the first light emitting element for indication and the light receiving element is positioned in the connecting section for light reception or one of the first light emitting element for indication and the light receiving element is positioned via the other.

Abstract: Provided is an ultrasonic flow switch which can be stably mounted on pipe. A clamp part is mounted on an outer surface of the pipe. A casing part which integrally or independently holds the first and second ultrasonic wave elements is fixed to the clamp part by a sensor fixing screw. The clamp part is configured to restrict displacement of the casing part in an axial direction of the pipe and in a circumferential direction of the pipe and to allow displacement of the casing part in a radial direction of the pipe in a state where the casing part is not fixed.

Abstract: Provided is an ultrasonic flow switch which can be stably mounted on pipe. A clamp part is mounted on an outer surface of the pipe. A casing part which integrally or independently holds the first and second ultrasonic wave elements is fixed to the clamp part by a sensor fixing screw. The clamp part is configured to restrict displacement of the casing part in an axial direction of the pipe and in a circumferential direction of the pipe and to allow displacement of the casing part in a radial direction of the pipe in a state where the casing part is not fixed.