Fujikin Inc.

Kosuke Sugimoto

Masaaki Nagase

Nobukazu Ikeda

Kouji Nishino

Kaoru Hirata

Atsushi Hidaka

Masafumi Kitano

Keisuke Ideguchi

Kazuyuki Morisaki

Takashi Fukawa

Hidekazu Ishii

Wataru Ashino

Provided is a concentration measurement device that can be miniaturized without using an optical fiber. The concentration measurement device including a measurement cell having a gas flow path and an optical path intersecting the gas flow path; a light source for emitting light inside the optical path, the light sourcebeing installed at one end of the optical path; a first photodetector for detecting a light emitted from the light source as a reference light, the first photodetector being installed at a side of the light source and rearward from a distal end of the light source in a light emitting direction along an optical axis of the light source; a second photodetector for detecting a light emitted from the light source for measuring light absorption, the second photodetector being installed at another end of the optical path.

Density measurement device

A diaphragm valve includes a body () having a flow path (), a seat () formed in the flow path (), a metal diaphragm () for opening and closing the flow path (), a pair of clamping parts () and () for claiming peripheral edge portions of the metal diaphragm () to fix the metal diaphragm () to the body (), and an actuator () for abutting the metal diaphragm () to the seat () or separating the metal diaphragm from the seat (), wherein a fluorine resin coating is formed on a seat side surface () of the metal diaphragm () at least in a contact region (B-A) with the seat () in a region (C) surrounded by a clamping region (D-C) between the seat side surface () and one of the pair of clamping portions (), excluding the clamping region (D-C).

Diaphragm valve

Growing community of inventors

Osaka, Japan

Kosuke Sugimoto