75338664
Aug 11, 1997
May 8, 2001
HIGH QUALITY AIR FLOW AND TEMPERATURE CONTROL SYSTEMS COMPRISED OF FLOW INDUCED ELECTRONIC DIFFERENTIAL PRESSURE TRANSDUCERS AND SENSORS, ANALOG ELECTRONIC SIGNAL CONDITIONING CARDS, PROPORTIONAL/INTEGRAL ANALOG ELECTRONIC CONTROLLERS, AND ANALOG ELECTRONIC VALVE POSITIONING EQUIPMENT ALONG WITH AN AUTOMATIC FUME HOOD SASH POSITIONING SYSTEM, SOLD AS A UNIT FOR USE IN LABORATORIES AND OTHER PRECISION AIR FLOW AND CONTROL APPLICATIONS
Electrical and Scientific Apparatus