Topic: Level & Weighing

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Level Sensing Resources
Control's Monthly Resource Guide. This Month We Talk Level Sensing Field Intruments

Lumps, Clumps and Ratholes, Oh My!
Measuring the Level of Powders and Bulk Solids Can Be Entertaining but It Is NOT Easy

On the Level
ControlGlobal.com
Level Measurement Is Ancient Technology, Updated Now to Meet Today’s Demands.

Finding Freebies in Fieldbus
ControlGlobal.com
Can We Use the Standard Deviation Method to Flag a Suspicious Measurement?

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White Papers: In Depth Research

Information on the Amperometric Measurement of free Chlorine, Chlorine Dioxide and Ozone in Water
Author: Dr. Jürgen Schleicher, JUMO
Posted: 10/30/2008
For reasons of hygiene, drinking water, or any other water that people come into direct or indirect contact with, often has to be treated with compounds that destroy any micro-organisms contained in it. Chlorine, chlorine compounds or ozone are very often used as disinfectants. In this sensitive area, a high level of safety for the consumer is an absolute requirement, and for this reason, systems are used for fully automatic monitoring, control and recording of the disinfectant concentration.

Amperometric sensors provide the best means of monitoring the disinfectant concentration. This technical publication will present the electrochemical fundamentals and the application technology of such sensors in an easily understood form, for the interested reader.

Information on Measuring Ammonia in Water
Author: Dr. Jürgen Schleicher, JUMO
Posted: 10/30/2008
Measurement of the concentration of ammonia in aqueous solutions is a requirement in many application areas, such as for coolant monitoring and laboratory measurement. A fast and simple way of measuring ammonia can be achieved by using a membranecovered, gas-sensitive sensor that operates on a potentiometric principle.

But for successful measurement, several factors must be observed when handling and using of ammonia sensors. This brochure is intended to provide practical help for the users in these matters. A special emphasis is placed on the two application situations mentioned above.

Furthermore, the construction and mode of operation of the sensor is also briefly described.

Information on the Measurement of Hydrogen Peroxid and Peracetic Acid
Author: Dr. Jürgen Schleicher, JUMO
Posted: 10/30/2008
The methods of determination of hydrogen peroxide and PAA are not continuous measurements methods, but methods whereby the concentration is measured for samples taken at certain times.

These analytical methods are laboratory procedures requiring a considerable outlay in personnel and time.

In order to regulate the concentration of a disinfectant, it is advantageous if a electrical signal is available that is continuous and proportional to the concentration of disinfectant. This signal can then be used as the input signal for controlling a disinfectant metering system, i.e. the concentration can be completely automatically regulated.

A membrane-covered amperometric measuring cell can be used for monitoring the peracetic acid concentration and the concentration of hydrogen peroxide.

Information on pH measurement
Author: Dr. Jürgen Schleicher, JUMO
Posted: 10/30/2008
The pH value is the most frequently used process variable in analysis. The pH value is of outstanding importance in water and environmental analysis and in almost all sectors of industry. Whether the cheese in a dairy is of the right quality, the water in a drinking water supply causes corrosion damage, or the precipitation in a treatment plant for waste water from an electroplating process occurs at the optimal point, all depend on such parameters as the pH value.

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Timeless Resources

Field Instrumentation Technical Handbook Field Instrumentation Technical Handbook is a useful compendium of physical constants, tables and information no engineer responsible for field instrumentation should be without. It has been required reading in many companies for many years. Download your free copy now.