How to find the right level sensor for your application

Introduction:

"There are many applications involving level measurement in process plants. There are various types of level sensors available for this purpose. It is very difficult, to find out the perfect choice. To meet the specific needs of an application, either for liquid or solids in any container, one must take into account the physical/chemical properties of a substance in question.

• How to select right measuring technology

All level measuring instrument is based on certain characteristics of the process material, such as density, pressure, temperature, etc., and its suitability for the same is to be taken into consideration. One can narrow down the options by considering the following factors before selection of right level sensor for level measurement and its suitability.

1) Applications/ Purpose of Level Measurement -

a) Visual Indication:-Various types of Techtrol make level gauges can be used for visual indication only, where the electrical output is not required.

 b) Detection of high /low and intermediate level for alarm &control action: - Level switches are useful for detection of the level at a particular point. Techtrol has a wide range of switches available.

 c) Continuous level measurement & quantity establishment with remote indication|- Different types of Techtrol make transmitters are suitable for this application. Techtrol makes transmitters are capable of digital communication and can be interfaced to PLC and DCS systems.

Thus Pune Techtrol’s wide range of level measuring instruments includes Level Gauges (visual indication), Level Switches (alarm & control action) and Level transmitters (continuous level measurement).

2) Service Medium whose level is to be measured–

It can be liquid, slurry, interface level of two liquids with different densities or powders/ granules.

Liquids can be corrosive or non-corrosive. Accordingly, the material of construction can be selected. Liquid characteristics such as specific gravity, dielectric constant, viscosity, conductivity must be taken into consideration.