According to one embodiment, a semiconductor light emitting device includes a substrate, a first electrode, a first conductivity type layer, a light emitting layer, a second conductivity type layer and a second electrode. The pumping volume of the hydraulic pump is regulated with the aid of a regulator device exposed to a regulating pressure which is regulated by an adjusting valve in conformity to a first and a second pressure. Since the transponder combines temperature and pressure information in the pressure data, the ratio NTNP is a direct indicator of pressure-only, and is also relatively insensitive to transponder power variations. 0, flexural strength is not lower than 20 Nmm2, dimensional change rate upon ten-day moisture release at 80\xb0 C. The light quantity characteristics represents a relationship between the first set data and a light emission quantity of the light emitting device.