September 1997

EDITORIAL
How to Be an Industry "Insider" Dorothy Rosa

FEATURES
True Accuracy of Humidity Measurement Pieter R. Wiederhold

Negative Temperature Coefficient Thermistors Part V: The Resistance Measuring Device and Thermistor Test Methods Gregg Lavenuta

Single-Sensor Measurement of Flow in Filled or Partially Filled Process Pipes John Flood

Electrolytic Measurement of Moisture in Natural Gas Teresa J. Lechner-Fish

A Refresher on Resistance Temperature Detectors J.R. Madden

Understanding Hall Effect Devices Bill Drafts

A Flow-Through Dielectric Sensor for Harsh Process Fluids Michael McBrearty

Instrumentation Amplifiers: A Tutorial Ed Ramsden

DA SYSTEMS
Achieving Cross-Platform Interoperability in Sensing and Control Systems Pradip Madan

DEPARTMENTS
   Calendar
   Research and Developments
   Literature
   Literature Showcase
   Product News
   Advertiser Index/Reader Service Card
   Wish List

ABOUT THE COVER

The pipes serving municipal and industrial water and wastewater treatment plants are not always filled to capacity. Facilities such as these typically incorporate sluice underpasses that can be kept full enough to permit the water flow rate to be measured. But this solution brings problems of its own-clogging and pressure loss in the line. A new approach, the Tidalflux, combines a magnetic flowmeter and a capacitive level sensor into a single noninvasive unit with no moving parts. The device is capable of measuring flow to an accuracy of 1% in both filled and partially filled pipes. For a description of how it works, see the article Single-Sensor Measurement of Flow in Filled or Partially Filled Process Pipes. (Photo courtesy of Krohne America, Inc.)