INSTRUMENTS MEASUREMENT CONCENTRATION

Brand	Owner	Address	Description
SALTTESTR	COLE-PARMER INSTRUMENT COMPANY	625 EAST BUNKER COURT VERNON HILLS IL 60061	Instruments for measurement of concentration of inorganic salts in scientific and laboratory environments;SALT TESTER;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A pump generates a gas flow within a measurement passage having an orifice. A differential pressure sensor detects a pressure difference between both ends of the orifice. Switching valves are disposed in the measurement passage to create a first concentration measurement state in which the measurement passage is opened at both ends thereof and the gas flowing through the measurement passage is the atmosphere, and a second concentration measurement state in which the measurement passage is in communication at both ends thereof with a canister and the gas flowing through the measurement passage is a fuel vapor-containing air-fuel mixture provided from the canister. An ECU calculates a fuel vapor concentration by based on a pressure difference detected in the first concentration measurement state and a pressure difference detected in the second concentration measurement state.