Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method of and system for real time differential pulse detection










Image Number 10 for United States Patent #4500391.

An electrochemical detection cell which includes, in the order named, a stack of components constituted by a first membrane, an electrode carrier having reference and counter electrodes thereon, a membrane support, an electrode carrier having a sensing electrode thereon, and a permselective membrane. Whatman filter papers are positioned between the sensing electrode and both the counter electrode and reference electrode, these being positionable in a central rectangular opening of the membrane support. The cell allows air or gas ambient to address the membranes and effects application of an electrolyte to space between the electrodes by, for example, a wick which extends between an electrolyte-containing reservoir and the Whatman filter papers. A system for detecting a gaseous agent uses the aforementioned detection cell coupled with circuitry capable of applying a fixed DC voltage bias to the reference electrode and superimposing a train of DC voltage pulses on the fixed bias. Further circuitry is coupled to and responsive to signals from the sensing electrode. This circuitry determines the difference between the sensing electrode signal at the end of each pulse minus that just before each pulse. The difference is proportional to the concentration of the test gas in the atmosphere adjacent to the sensor, and is a more specific and sensitive indication of the test gas concentration than prior art sensors.








 
 
  Recently Added Patents
Using storage cells to perform computation
Graphical user interfaces and occlusion prevention for fisheye lenses with line segment foci
Three-dimensional shape data processing apparatus and three-dimensional shape data processing method
Authenticating messages sent between a vehicle and a central facility
System and method for providing dynamic navigation through a property to a selected destination
Peered proctoring
Engineered magnetic layer with improved perpendicular anisotropy using glassing agents for spintronic applications
  Randomly Featured Patents
Fluid treatment device and method
Technique for SC-FDMA signal generation
Electromagnetic fluid flow control valve
Optical information recording medium
Container having a tamper proof lid
Internal combustion engine
Delivering multiple optical signals using light that does not carry the data
Splash shield systems
Curved paint brush wiper for positioning on a plastic paint bucket
Method for treating depression