INSTRUMENTS MEASURING ENVIRONMENTAL PARAMETERS

Brand	Owner (click to sort)	Address	Description
DETECTAIR	Greg Bertaux	475 19th Place Vero Beach FL 32960	Instruments for measuring environmental parameters, namely, portable air quality testing devices with battery or electric power, for use in residential, commercial, and industrial settings;DETECT AIR;
FLASHLINK	DeltaTrak, Inc.	6801 Koll Center Parkway, Ste. 120 Pleasanton CA 94566	Instruments for measuring environmental parameters such as barometers, thermometers, and hygrometers;FLASH LINK;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The invention relates to a capacitive sensor system for measuring environmental parameters by activating a capacitive array and causing fringe electric fields to intersect the surrounding environment. An oscillator is coupled to the capacitive array and the frequency of oscillation depends upon the capacitance of the array, which represents an environmental parameter. The sensor is suitable for measuring resistivity and dielectric constant parameters in geophysical, environmental, hydro-geological and related applications. The conductors of the capacitive array can be arranged around a perimeter for use, for example, in a borehole or the conductors can be arranged in the same plane for use, for example, beneath a raft in shallow water. In the situation where the boreholes are fluid-filled, there are economic and technical advantages in using the metal plugs (normally used to seal the probe housings at each end), as the capacitive array in galvanic contact with the fluid.