Resources Contact Us Home
Gas detectors and gas analyzers utilizing spectral absorption

Image Number 6 for United States Patent #4746218.

Instrumentation to detect the presence of, or to measure the concentration of, a gas or pollutant in a gaseous environment. With the use of gas filter correlation techniques and energy beams having suitable wavelengths, the presence and concentrations of these can be detected and measured, not only in flowing streams such as in exhaust stacks, but above a ground area and around its perimeter. A calibration means using a retrodirective reflector is also shown.

  Recently Added Patents
Optical navigation device with image sensor and inner housing
Controlling generation of debug exceptions
Packaging article
Method for fabricating a nitrided silicon-oxide gate dielectric
Flame-proofed thermoplastic compositions
Topology discovery, control channel establishment, and datapath provisioning within an aggregation network with centralized control
Downhole telemetry system
  Randomly Featured Patents
Pipe cutter
Method of inhibiting virus
Equipment for the elimination of light particles, inks and air from a fiber suspension for the manufacture of paper
Methods and brake disc assemblies to increase the use of friction material
Modulation technique for transmitting a high data rate signal, and an auxiliary data signal, through a band limited channel
Blends of polyetherimides and block poly(esteramides)
Polymer compound, photoresist composition including the polymer compound, and resist pattern formation method
Intrauterine device
Authentication system and terminal authentication apparatus
Remote distance-measurement between any two arbitrary points using laser assisted optics