Abstract: A light emitting device includes: a substrate; a light emitting element; a wavelength conversion layer; and a wall surrounding the wavelength conversion layer, having an opening portion exposing at least a part of a top surface of the wavelength conversion layer, and containing a light reflective material. The surface of the wall includes a top surface provided at a higher position than the top surface of the wavelength conversion layer, and an inner surface forming the opening portion. The wall includes a first portion surrounding the wavelength conversion layer, and a second portion provided over the first portion and surrounding the first portion. The opening portion is hollow. An angle of a corner portion between the top surface and the inner surface of the wall is in a range of 90 degrees or greater and less than 180 degrees.

Abstract: An abnormality detecting system includes equipment for detecting an abnormality which occurs therein and for transmitting an abnormal signal, and an abnormal signal processing unit for analyzing the abnormal signal received from the electric equipment. The abnormal signal processing unit is formed in a portable shape, and receives an abnormal signal from the electric equipment in a non-contact manner by means of radiowaves or infrared rays. The abnormal signal processing unit stores beforehand data relating to abnormalities and data corresponding to the received abnormal signal can be extracted and displayed. Further, the abnormal signal processing unit can transmit the received abnormal signal to an external component by means of radiowaves or infrared rays.