Principle of GAS measurement

         Principle of GAS measurement

Generally, molecules absorb their own vibration and rotation spectrum when being radiated of infrared rays. Gas concentration in the sample is measured by using non-dispersive infrared ray analyzer by applying optical absorption at 7.3m(7,300nm) and 5.3m of infrared ray field.

Features of Gas Analyzer :

► Stable measuring can be made due to long life of infrared ray source.
► It has high response speed
► High-speed measuring can be made.
► It has less interference due to interruption ingredients.
► Easy maintenance can be made.
► It has good operation with high precision and multi-functions with microprocessor.
► It has built-in alarm function to output max/min contact output.
► Improvement of precision of Zero/Span calibration can be made easily by pressing each control key.
► Max. 1:20 range ratio is possible at standard two-range, by applying mass flow type detector with high speed and high reliability.
► Sample switching system and planetary differential system are also used for measuring besides standard system. Infrared ray source of light, rotation sector, sync signal, contact output, range identification signal, solenoid valve drive signal, output in the middle of calibration, transfer value, indirect compensation detector, detector AC voltage amplifier, gauge change, etc.

Types of Hydraulic Pumps

                          Types of Hydraulic Pumps

Many different methods are used to classify pumps. Terms such as positive displacement, non positive displacement, fixed delivery, variable delivery, low pressure, high pressure and other terms used to describe the pump. The first two terms are the fundamental terms to describe the pump. That is, all pumps are either positive displacement pumps or non positive displacement pumps. In other words, the method that is used to supply the energy to the liquid determines the category into which the pump is placed.
So, there are two main categories of pumps:

i. Roto-Dynamic pumps (non positive displacement pumps).
ii. Positive displacement pumps.

Pumps duties may be range from a low pressure of a fraction of a bar and small capacities of a few litters per minute to a high pressure of several hundred bars and large capacities so, each of those categories has sub-groups consisting different types of pumps as shown in the following diagram:

Basically, pumps that discharge (pump) liquid in continuous flow are referred to non positive displacement pumps (Roto-Dynamic pumps) and those pumps that discharge liquid separated by a period of no discharge are referred to positive displacement pumps