What is a Transducer ?
Transducers play an important role in the field of instrumentation and control engineering. Any energy in a process should be converted from one form into another form to make the…
What is LVDT ?
Linear Variable Displacement Transducer (LVDT): A very basic transducer which is always useful in the field of instrumentation, I have studied about this in my college days. Now let me…
Strain Gauge Load Cell
Principle of Strain gauge load cell When steel cylinder is subjected to a force, it tends to change in dimension. On this cylinder, if the strain gauges are bonded, the…
Bimetallic Thermometer
A bimetallic strip is made up of metal A and B, having different thermal expansion co-efficient. It is bonded together. These thermometers use the following two principles: 1. All metals…
Bourdon Tube Pressure Gauge
Bourdon tube pressure gauge when an elastic transducer ( bourdon tube in this case ) is subjected to a pressure, it defects. This deflection is proportional to the applied pressure…
Elastic Diaphragm Gauge Principle
Principle of Elastic diaphragm gauges when an elastic transducer (diaphragm is this case) is subjected to a pressure, it deflects. This deflection is proportional to the applied pressure when calibrated.…
Strain Gauge Pressure Sensor Principle
Strain Gauge Pressure Sensor Principle : When a closed container is subjected to the appilied pressure, it is strained (that is, its dimension changes). Measurement of this strain with a…
Types of Control Systems
There are two types of control systems namely: Open loop control systems (non-feedback control systems) Closed loop control systems (feedback control systems) Open Loop Control System If in a physical…
Example of Feedback System
Home furnace control system must control the temperature in the room and kept it constant. As in open loop system a timer is used to switch on the furnace for…
Pneumatic Load Cell Principle
Principle of Pneumatic Load Cell If a force is applied to one side of a diaphragm and an air pressure is applied to the other side, some particular value of…
